Simple Presentation Of BASE ISOLATION
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This document discusses base isolation as a means of protecting structures from earthquake forces. It describes different types of base isolators like elastomeric rubber bearings and friction pendulum systems. The most common configuration is to install isolators immediately above a diaphragm. While base isolation provides advantages like protecting structures and concentrating damage, it also has disadvantages such as being inefficient for tall buildings and requiring skilled labor.
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Base isolation.ppt [Autosaved] [Autosaved]
This document introduces base isolation as a seismic retrofitting technique. It defines base isolation as decoupling a structure's superstructure from its substructure using structural elements. The document discusses the principle of base isolation, which is to isolate the structure from ground movement. It compares base isolation to other retrofitting techniques, noting advantages such as reduced structural damage and maintenance costs. The document also outlines different base isolation systems using elastomeric bearings and sliding systems. Examples of base isolation projects and companies utilizing the technique are provided. The document suggests government initiatives and training to develop base isolation in India.
Base isolation Engineering
This document discusses base isolation as a seismic protection system for buildings. It defines base isolation as reducing the interaction between a structure and the ground by incorporating seismic isolation at the base. It describes the principles of base isolation, including allowing the ground to move without transmitting motions to the structure. It also outlines different isolation components like elastomeric isolators and sliding isolators. Examples of base isolation being used in real buildings in India are provided. The document concludes that base isolation is a reliable earthquake resistant design method when properly planned and developed isolation systems are used.
Base isolation and its Application By Mukesh Singh Ghuraiya
This document discusses base isolation systems and their applications for earthquake resistance. It defines base isolation as detaching a building from the ground to reduce transmitted earthquake motions. Common base isolation systems use devices like rubber bearings, steel dampers, and friction dampers placed between the foundation and structure. Base isolation provides safety, property preservation, and effective protection for stiff structures. Examples given of buildings using base isolation include Oakland City Hall, the Foothill Communities Law & Justice Center, and San Francisco City Hall. The document recommends base isolation for important structures like government offices, hospitals, schools, and cultural sites.
Base isolation case study PDF
This document provides an overview of base isolation, which is a seismic protection system that mitigates earthquake damage by isolating structures from ground motions. It discusses the concepts of base isolation, including introducing flexibility to reduce transmitted forces. Common isolation components like elastomeric and lead-rubber bearings are described. The document also covers principles, suitability, differences between isolated and fixed structures, and real-world applications of base isolation in over 1000 buildings worldwide.
Base isolation of structures
The document discusses base isolation as an earthquake protection system. It begins with an introduction to earthquakes and then defines base isolation as a system that uses flexible interfaces between a structure and its foundation to decouple the structure from ground motions during an earthquake. It describes various types of base isolation systems, including sliding and elastomeric bearing systems, and discusses considerations for implementing base isolation for structures. It provides an example of base isolation being used in a new hospital built after the collapse of a hospital during an earthquake in India.
Report on Study on Base Isolation Techniques.
Base Isolation technique is on of the advance technique used for construction of earthquake resisting sturcture.
All earthquake resisting structure are based on this technique.
This consit report on study of base isolation with its advantages disadvanges.
Earthquake and earthquake resistant design
This document discusses various earthquake-resistant features used in building design including:
1) Using beams as ductile weak links rather than columns through strong-column weak-beam design.
2) Improving masonry wall behavior by controlling wall dimensions and heights, ensuring proper construction and bonding, and adding horizontal reinforcement.
3) Using shear walls in reinforced concrete buildings to provide strength and stiffness throughout the building height.
Design Steps for Earthquake Resistant Structures
This document provides information about earthquakes and their causes. It discusses what earthquakes are, how they are caused by the movement of tectonic plates along faults, and defines key terms like epicenter. It describes the interior structure of the Earth and plate tectonics. Safety procedures during earthquakes are outlined. The types of earthquake waves and how they are measured on seismographs is explained. Finally, it discusses earthquake magnitude scales and seismic zoning in India.
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Base isolation.ppt [Autosaved] [Autosaved]
This document introduces base isolation as a seismic retrofitting technique. It defines base isolation as decoupling a structure's superstructure from its substructure using structural elements. The document discusses the principle of base isolation, which is to isolate the structure from ground movement. It compares base isolation to other retrofitting techniques, noting advantages such as reduced structural damage and maintenance costs. The document also outlines different base isolation systems using elastomeric bearings and sliding systems. Examples of base isolation projects and companies utilizing the technique are provided. The document suggests government initiatives and training to develop base isolation in India.
Base isolation Engineering
This document discusses base isolation as a seismic protection system for buildings. It defines base isolation as reducing the interaction between a structure and the ground by incorporating seismic isolation at the base. It describes the principles of base isolation, including allowing the ground to move without transmitting motions to the structure. It also outlines different isolation components like elastomeric isolators and sliding isolators. Examples of base isolation being used in real buildings in India are provided. The document concludes that base isolation is a reliable earthquake resistant design method when properly planned and developed isolation systems are used.
Base isolation and its Application By Mukesh Singh Ghuraiya
This document discusses base isolation systems and their applications for earthquake resistance. It defines base isolation as detaching a building from the ground to reduce transmitted earthquake motions. Common base isolation systems use devices like rubber bearings, steel dampers, and friction dampers placed between the foundation and structure. Base isolation provides safety, property preservation, and effective protection for stiff structures. Examples given of buildings using base isolation include Oakland City Hall, the Foothill Communities Law & Justice Center, and San Francisco City Hall. The document recommends base isolation for important structures like government offices, hospitals, schools, and cultural sites.
Base isolation case study PDF
This document provides an overview of base isolation, which is a seismic protection system that mitigates earthquake damage by isolating structures from ground motions. It discusses the concepts of base isolation, including introducing flexibility to reduce transmitted forces. Common isolation components like elastomeric and lead-rubber bearings are described. The document also covers principles, suitability, differences between isolated and fixed structures, and real-world applications of base isolation in over 1000 buildings worldwide.
Base isolation of structures
The document discusses base isolation as an earthquake protection system. It begins with an introduction to earthquakes and then defines base isolation as a system that uses flexible interfaces between a structure and its foundation to decouple the structure from ground motions during an earthquake. It describes various types of base isolation systems, including sliding and elastomeric bearing systems, and discusses considerations for implementing base isolation for structures. It provides an example of base isolation being used in a new hospital built after the collapse of a hospital during an earthquake in India.
Report on Study on Base Isolation Techniques.
Base Isolation technique is on of the advance technique used for construction of earthquake resisting sturcture.
All earthquake resisting structure are based on this technique.
This consit report on study of base isolation with its advantages disadvanges.
Earthquake and earthquake resistant design
This document discusses various earthquake-resistant features used in building design including:
1) Using beams as ductile weak links rather than columns through strong-column weak-beam design.
2) Improving masonry wall behavior by controlling wall dimensions and heights, ensuring proper construction and bonding, and adding horizontal reinforcement.
3) Using shear walls in reinforced concrete buildings to provide strength and stiffness throughout the building height.
Design Steps for Earthquake Resistant Structures
This document provides information about earthquakes and their causes. It discusses what earthquakes are, how they are caused by the movement of tectonic plates along faults, and defines key terms like epicenter. It describes the interior structure of the Earth and plate tectonics. Safety procedures during earthquakes are outlined. The types of earthquake waves and how they are measured on seismographs is explained. Finally, it discusses earthquake magnitude scales and seismic zoning in India.
Microsoft Word - BASE ISOLATION
This document provides a summary of base isolation as a seismic retrofitting technique. It defines base isolation as decoupling a structure from its foundation to protect it during earthquakes. It describes different types of base isolators using materials like rubber, lead and steel. Advantages include reducing structural damage, secondary damage, and maintenance costs. Disadvantages include challenges implementing for tall buildings. Examples of base isolated structures worldwide and in India are given. The document concludes with suggestions for government initiatives to develop this technology in India.
Base isolation for Engineers
Base isolation is an earthquake protection system that involves installing seismic isolation bearings between a structure's foundation and superstructure. This significantly increases the natural period of the structure and adds damping, reducing the seismic response. Common base isolation bearings include elastomeric isolators and sliding isolators. Two examples given are the historic Oakland City Hall and San Francisco City Hall, which were retrofitted with base isolation systems after being damaged in the 1989 Loma Prieta earthquake. This helped preserve their historic integrity while improving seismic performance.
Base Isolation of Structure.
This ppt shows how earthquake from and methods to reduce earthquake force transmit to the structure.
Base isolation topic as per jntu syllabus for m.tech 1st year structures
Base isolation is a seismic protection system that places flexible bearings between a structure and its foundation. During an earthquake, the bearings allow the structure to move independently from the shaking ground, isolating it from seismic forces. Common base isolation bearings include elastomeric bearings and lead-rubber bearings, which are stiff vertically but flexible horizontally. Base isolation is effective because it lengthens a structure's period of vibration, reducing the accelerations and forces experienced, and protects both the structure and its contents from earthquake damage.
Dampers
Dampers are mechanical systems that dissipate earthquake energy by deforming or yielding. They absorb seismic energy, reducing forces on structures and controlling building oscillations. Common types include hydraulic dampers using fluid flow, electro-rheological fluid dampers using variable viscosity fluids, metallic dampers using hysteretic behavior of metals, steel dampers using frame deformation, and friction dampers using clamped friction surfaces. Shape memory alloys also dissipate energy through large strain recovery without damage. Dampers direct earthquake energy to dissipating devices within structures, transforming mechanical energy into heat.
Base isolation
Base isolation is a seismic protection system that separates a structure from its foundation, allowing the structure to remain largely motionless during an earthquake by absorbing shock through devices like friction pendulums and elastomeric bearings. There are various types of base isolators including low-damping rubber bearings, lead-rubber bearings, and sliding systems. Base isolation is most suitable for low to medium-rise buildings founded on firm soil, as it reduces seismic forces and prevents damage by permitting the ground and structure to move independently.
Earthquake resistant buildings in india
This document discusses techniques for building earthquake resistant structures in India. It covers various sources of earthquakes and methods to resist seismic activity, including both active and passive systems. Some specific techniques mentioned are shear walls, bracing, dampers, isolation, and using light-weight materials. Suggestions are provided such as avoiding weak column designs, including thick slabs and cross walls, and following building codes.
seismic control of structure
The document discusses base isolation, which aims to protect structures from earthquake damage by partially decoupling the structure from ground motion. It describes various types of base isolation systems, including elastomeric and sliding systems. Research is ongoing to develop natural base isolation using materials like soil and sand. Case studies demonstrate the successful application of base isolation in retrofitting historic structures and new construction. In conclusion, base isolation is a proven seismic protection method when isolation devices and planning are properly implemented.
BASE ISOLATION SYSTEM
This document discusses seismic retrofitting and base isolation systems. It defines seismic retrofitting as modifying existing structures to make them more resistant to seismic activity. The most widely used retrofitting method is base isolation, which involves inserting rubber or similar isolators between a building's foundation and superstructure. This allows for slight lateral movement during an earthquake to increase the building's natural period and reduce seismic forces. There are two main types of base isolators: sliding systems and elastometric isolators, with lead rubber bearings being a common elastometric isolator that uses lead plugs to dissipate energy and limit displacement. Base isolation has been used worldwide to reinforce historical structures and reduce earthquake damage to buildings and artifacts.
Base isolation techniques-Earthquake Engineering
The document discusses base isolation techniques for earthquake-resistant building design. Base isolation involves separating the structure from its foundation using a suspension system to reduce seismic demand on the building. There are several types of base isolation devices that provide flexibility, damping and resistance to vertical loads, including elastomeric bearings, lead rubber bearings, and flat or curved slider bearings. Elastomeric bearings use layers of rubber between steel plates to support vertical loads while allowing flexibility under lateral earthquake forces.
Earthquake resistance structures
tells about how the earthquakes are happen, effect of earthquakes on buildings and design methods to be followed to design earthquake resistance building.
Base isolation earthquake resistance wooden house
Base isolation is a seismic protection system that isolates structures from potentially dangerous ground motions during an earthquake. It works by incorporating seismic isolation devices, such as elastomeric bearings or springs, between the structure's foundation and subsoil. This allows the structure to move independently and reduces the transfer of seismic forces. The decoupling improves the structure's flexibility and response during an earthquake. Some advantages of base isolation include reduced seismic demand, lower structural costs, decreased displacements, improved safety, and reduced damage. It has been successfully used in several buildings in India, including hospitals. A case study examines using base isolation with springs and steel to seismic-proof a wooden house model.
earthquake resistant ppt
The document discusses earthquake resistant building design techniques. It begins by defining earthquakes and explaining seismology, the study of seismic waves. It then discusses different types of ground shaking caused by earthquakes like shaking, landslides, and liquefaction. It introduces earthquake zones and describes earthquake resistant design as designing buildings to resist seismic forces. Popular techniques discussed include shear walls, bracing, seismic dampers, isolation, bands, and rollers. Specific techniques like shear walls, bracing, dampers, base isolation, horizontal bands, and expansion joints are explained. Suggestions for earthquake resistant design and construction are provided.
Earth resistant design philosophy
This document discusses the earthquake design philosophy of making buildings resistant to earthquakes. It explains that earthquakes are divided into minor, moderate and strong shaking based on frequency and intensity. The goal of earthquake resistant design is to mitigate earthquake effects by designing structures to withstand smaller forces than actual earthquake forces. The document then outlines the expected damage to buildings under minor, moderate and strong shaking. It emphasizes designing key structural elements like beams and columns to be ductile to absorb energy and prevent collapse during earthquakes. Shear walls are also discussed as important seismic resistant elements.
Earthquake Resisting Structure Techniques
This document discusses techniques for making structures resistant to earthquakes, including base isolation and energy dissipation devices. Base isolation involves separating the building from the ground using flexible rubber devices to allow it to move independently during an earthquake. Energy dissipation devices, like seismic dampers, absorb seismic energy to dampen the motion of the building. Common types of base isolators are lead rubber bearings and spherical sliding isolators, while common seismic dampers include viscous, friction, and yielding dampers. Proper seismic design involves principles like avoiding brittle elements, providing strength throughout the building, and well-connecting the building to its foundation.
Shear wall
1) Shear walls are vertical elements that carry lateral loads like wind and seismic forces from the building down to the foundation, forming a box structure for support.
2) Shear walls should be placed on all levels of the building, including the basement, and symmetrically on all four exterior walls to form an effective structure. Interior walls can add strength when exterior walls are not sufficient.
3) Common types of shear walls include reinforced concrete, plywood, steel plate, and hollow concrete block masonry walls. Proper design and ductility improve shear wall performance during seismic events.
Earthquake resistant techniques
This document summarizes earthquake resistant techniques. It discusses conventional methods like strengthening buildings through stiffness and ductility. Advanced methods of base isolation and energy dissipation devices are explained. Case studies on buildings like Torre Mayor and Transamerica Pyramid are provided. Techniques under research like shape memory alloys, mussel fibers, visco-elastic dampers and rubber cloaking are outlined. Seismic zones and codes in India are briefly covered along with references.
blast resistant structures
This document discusses the design of blast resistant structures. It covers types of blasts, principles of blast resistant design such as maintaining safe stand-off zones and minimizing debris, and guidelines for analysis including redundancy and ductile structure elements. It also describes procedures for analysis using pressure-impulse diagrams and finite element methods. Acceptable damage levels from minor to major are defined. The key differences between blast and seismic loads are outlined, and it is concluded that while withstanding any attack is impractical, performance can be improved through appropriate design processes.
Shear wall
A shear wall is a vertical structural element used to resist horizontal forces such as wind and seismic forces. Shear walls are generally used in high-rise buildings where the effects of wind and seismic forces are more significant. Shear walls are usually provided along both the length and width of buildings and act like vertically-oriented beams that carry earthquake loads downwards to the foundation. Common types of shear walls include reinforced concrete, concrete block, steel, plywood, and mid-ply shear walls. Shear walls must provide the necessary lateral strength to resist horizontal earthquake forces and lateral stiffness to prevent excessive side-sway of the structure.
Earthquake resistent building construction ppt
This document summarizes techniques for earthquake resistant building construction. It discusses how earthquake resistant buildings differ from traditional buildings in their design. Some techniques discussed include using reinforced hollow concrete block masonry, which uses reinforced blocks as load-bearing walls and shear walls. Mid-level isolation is described as installing base isolation systems on intermediate floors of existing buildings. Slurry infiltrated mat concrete is presented as a new type of concrete being developed to prevent building collapse. Traditional earthquake resistant housing styles from various regions of India are also overviewed.
Base isolation
Base isolation is one of the most widely accepted seismic protection systems in earthquake prone areas. It mitigates the effect of an earthquake by essentially isolating the structure from potentially dangerous ground motions, especially in frequency range where building is mostly affected. This includes
Concept of Base Isolation
Principle of Base Isolation
Comparison of Fixed Base Structure and Isolated Base Structure
Types of Isolation Components
Base Isolation in Real Buildings
Applications of Base Isolation
Base isolation
1. Base isolation is a seismic protection technique where structures are supported by flexible bearing pads placed between the building and its foundation. This allows the building to move independently of the ground during an earthquake and reduces the forces transferred to the structure.
2. Common types of base isolation bearings include lead-rubber bearings and high-damping rubber bearings. Lead-rubber bearings consist of alternating layers of rubber and lead that provide flexibility and energy dissipation. High-damping rubber bearings use rubber with added fillers to increase inherent damping.
3. A hybrid bearing called a lead high-damping rubber bearing combines the initial rigidity of a lead plug with the continuous energy dissipation of
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Microsoft Word - BASE ISOLATION
This document provides a summary of base isolation as a seismic retrofitting technique. It defines base isolation as decoupling a structure from its foundation to protect it during earthquakes. It describes different types of base isolators using materials like rubber, lead and steel. Advantages include reducing structural damage, secondary damage, and maintenance costs. Disadvantages include challenges implementing for tall buildings. Examples of base isolated structures worldwide and in India are given. The document concludes with suggestions for government initiatives to develop this technology in India.
Base isolation for Engineers
Base isolation is an earthquake protection system that involves installing seismic isolation bearings between a structure's foundation and superstructure. This significantly increases the natural period of the structure and adds damping, reducing the seismic response. Common base isolation bearings include elastomeric isolators and sliding isolators. Two examples given are the historic Oakland City Hall and San Francisco City Hall, which were retrofitted with base isolation systems after being damaged in the 1989 Loma Prieta earthquake. This helped preserve their historic integrity while improving seismic performance.
Base Isolation of Structure.
This ppt shows how earthquake from and methods to reduce earthquake force transmit to the structure.
Base isolation topic as per jntu syllabus for m.tech 1st year structures
Base isolation is a seismic protection system that places flexible bearings between a structure and its foundation. During an earthquake, the bearings allow the structure to move independently from the shaking ground, isolating it from seismic forces. Common base isolation bearings include elastomeric bearings and lead-rubber bearings, which are stiff vertically but flexible horizontally. Base isolation is effective because it lengthens a structure's period of vibration, reducing the accelerations and forces experienced, and protects both the structure and its contents from earthquake damage.
Dampers
Dampers are mechanical systems that dissipate earthquake energy by deforming or yielding. They absorb seismic energy, reducing forces on structures and controlling building oscillations. Common types include hydraulic dampers using fluid flow, electro-rheological fluid dampers using variable viscosity fluids, metallic dampers using hysteretic behavior of metals, steel dampers using frame deformation, and friction dampers using clamped friction surfaces. Shape memory alloys also dissipate energy through large strain recovery without damage. Dampers direct earthquake energy to dissipating devices within structures, transforming mechanical energy into heat.
Base isolation
Base isolation is a seismic protection system that separates a structure from its foundation, allowing the structure to remain largely motionless during an earthquake by absorbing shock through devices like friction pendulums and elastomeric bearings. There are various types of base isolators including low-damping rubber bearings, lead-rubber bearings, and sliding systems. Base isolation is most suitable for low to medium-rise buildings founded on firm soil, as it reduces seismic forces and prevents damage by permitting the ground and structure to move independently.
Earthquake resistant buildings in india
This document discusses techniques for building earthquake resistant structures in India. It covers various sources of earthquakes and methods to resist seismic activity, including both active and passive systems. Some specific techniques mentioned are shear walls, bracing, dampers, isolation, and using light-weight materials. Suggestions are provided such as avoiding weak column designs, including thick slabs and cross walls, and following building codes.
seismic control of structure
The document discusses base isolation, which aims to protect structures from earthquake damage by partially decoupling the structure from ground motion. It describes various types of base isolation systems, including elastomeric and sliding systems. Research is ongoing to develop natural base isolation using materials like soil and sand. Case studies demonstrate the successful application of base isolation in retrofitting historic structures and new construction. In conclusion, base isolation is a proven seismic protection method when isolation devices and planning are properly implemented.
BASE ISOLATION SYSTEM
This document discusses seismic retrofitting and base isolation systems. It defines seismic retrofitting as modifying existing structures to make them more resistant to seismic activity. The most widely used retrofitting method is base isolation, which involves inserting rubber or similar isolators between a building's foundation and superstructure. This allows for slight lateral movement during an earthquake to increase the building's natural period and reduce seismic forces. There are two main types of base isolators: sliding systems and elastometric isolators, with lead rubber bearings being a common elastometric isolator that uses lead plugs to dissipate energy and limit displacement. Base isolation has been used worldwide to reinforce historical structures and reduce earthquake damage to buildings and artifacts.
Base isolation techniques-Earthquake Engineering
The document discusses base isolation techniques for earthquake-resistant building design. Base isolation involves separating the structure from its foundation using a suspension system to reduce seismic demand on the building. There are several types of base isolation devices that provide flexibility, damping and resistance to vertical loads, including elastomeric bearings, lead rubber bearings, and flat or curved slider bearings. Elastomeric bearings use layers of rubber between steel plates to support vertical loads while allowing flexibility under lateral earthquake forces.
Earthquake resistance structures
tells about how the earthquakes are happen, effect of earthquakes on buildings and design methods to be followed to design earthquake resistance building.
Base isolation earthquake resistance wooden house
Base isolation is a seismic protection system that isolates structures from potentially dangerous ground motions during an earthquake. It works by incorporating seismic isolation devices, such as elastomeric bearings or springs, between the structure's foundation and subsoil. This allows the structure to move independently and reduces the transfer of seismic forces. The decoupling improves the structure's flexibility and response during an earthquake. Some advantages of base isolation include reduced seismic demand, lower structural costs, decreased displacements, improved safety, and reduced damage. It has been successfully used in several buildings in India, including hospitals. A case study examines using base isolation with springs and steel to seismic-proof a wooden house model.
earthquake resistant ppt
The document discusses earthquake resistant building design techniques. It begins by defining earthquakes and explaining seismology, the study of seismic waves. It then discusses different types of ground shaking caused by earthquakes like shaking, landslides, and liquefaction. It introduces earthquake zones and describes earthquake resistant design as designing buildings to resist seismic forces. Popular techniques discussed include shear walls, bracing, seismic dampers, isolation, bands, and rollers. Specific techniques like shear walls, bracing, dampers, base isolation, horizontal bands, and expansion joints are explained. Suggestions for earthquake resistant design and construction are provided.
Earth resistant design philosophy
This document discusses the earthquake design philosophy of making buildings resistant to earthquakes. It explains that earthquakes are divided into minor, moderate and strong shaking based on frequency and intensity. The goal of earthquake resistant design is to mitigate earthquake effects by designing structures to withstand smaller forces than actual earthquake forces. The document then outlines the expected damage to buildings under minor, moderate and strong shaking. It emphasizes designing key structural elements like beams and columns to be ductile to absorb energy and prevent collapse during earthquakes. Shear walls are also discussed as important seismic resistant elements.
Earthquake Resisting Structure Techniques
This document discusses techniques for making structures resistant to earthquakes, including base isolation and energy dissipation devices. Base isolation involves separating the building from the ground using flexible rubber devices to allow it to move independently during an earthquake. Energy dissipation devices, like seismic dampers, absorb seismic energy to dampen the motion of the building. Common types of base isolators are lead rubber bearings and spherical sliding isolators, while common seismic dampers include viscous, friction, and yielding dampers. Proper seismic design involves principles like avoiding brittle elements, providing strength throughout the building, and well-connecting the building to its foundation.
Shear wall
1) Shear walls are vertical elements that carry lateral loads like wind and seismic forces from the building down to the foundation, forming a box structure for support.
2) Shear walls should be placed on all levels of the building, including the basement, and symmetrically on all four exterior walls to form an effective structure. Interior walls can add strength when exterior walls are not sufficient.
3) Common types of shear walls include reinforced concrete, plywood, steel plate, and hollow concrete block masonry walls. Proper design and ductility improve shear wall performance during seismic events.
Earthquake resistant techniques
This document summarizes earthquake resistant techniques. It discusses conventional methods like strengthening buildings through stiffness and ductility. Advanced methods of base isolation and energy dissipation devices are explained. Case studies on buildings like Torre Mayor and Transamerica Pyramid are provided. Techniques under research like shape memory alloys, mussel fibers, visco-elastic dampers and rubber cloaking are outlined. Seismic zones and codes in India are briefly covered along with references.
blast resistant structures
This document discusses the design of blast resistant structures. It covers types of blasts, principles of blast resistant design such as maintaining safe stand-off zones and minimizing debris, and guidelines for analysis including redundancy and ductile structure elements. It also describes procedures for analysis using pressure-impulse diagrams and finite element methods. Acceptable damage levels from minor to major are defined. The key differences between blast and seismic loads are outlined, and it is concluded that while withstanding any attack is impractical, performance can be improved through appropriate design processes.
Shear wall
A shear wall is a vertical structural element used to resist horizontal forces such as wind and seismic forces. Shear walls are generally used in high-rise buildings where the effects of wind and seismic forces are more significant. Shear walls are usually provided along both the length and width of buildings and act like vertically-oriented beams that carry earthquake loads downwards to the foundation. Common types of shear walls include reinforced concrete, concrete block, steel, plywood, and mid-ply shear walls. Shear walls must provide the necessary lateral strength to resist horizontal earthquake forces and lateral stiffness to prevent excessive side-sway of the structure.
Earthquake resistent building construction ppt
This document summarizes techniques for earthquake resistant building construction. It discusses how earthquake resistant buildings differ from traditional buildings in their design. Some techniques discussed include using reinforced hollow concrete block masonry, which uses reinforced blocks as load-bearing walls and shear walls. Mid-level isolation is described as installing base isolation systems on intermediate floors of existing buildings. Slurry infiltrated mat concrete is presented as a new type of concrete being developed to prevent building collapse. Traditional earthquake resistant housing styles from various regions of India are also overviewed.
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Base isolation topic as per jntu syllabus for m.tech 1st year structures
Base isolation topic as per jntu syllabus for m.tech 1st year structures
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Base isolation is one of the most widely accepted seismic protection systems in earthquake prone areas. It mitigates the effect of an earthquake by essentially isolating the structure from potentially dangerous ground motions, especially in frequency range where building is mostly affected. This includes
Concept of Base Isolation
Principle of Base Isolation
Comparison of Fixed Base Structure and Isolated Base Structure
Types of Isolation Components
Base Isolation in Real Buildings
Applications of Base Isolation
Base isolation
1. Base isolation is a seismic protection technique where structures are supported by flexible bearing pads placed between the building and its foundation. This allows the building to move independently of the ground during an earthquake and reduces the forces transferred to the structure.
2. Common types of base isolation bearings include lead-rubber bearings and high-damping rubber bearings. Lead-rubber bearings consist of alternating layers of rubber and lead that provide flexibility and energy dissipation. High-damping rubber bearings use rubber with added fillers to increase inherent damping.
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This document discusses different types of cladding materials used in construction. It describes stone, timber, brick, metal, glass, and rainscreen cladding. Stone cladding uses thin stone layers attached to buildings for aesthetics. Timber cladding uses horizontal wood boards or shingles for a rustic look. Brick and metal cladding provide protection from weather elements while glass cladding allows light transmission and a sense of openness. Rainscreen cladding features an outer ventilated layer and inner insulating layer to manage moisture and energy efficiency.
Earthquake resistance in buildings
A report format presentation of earthquake-resistance construction techniques, stressing upon the relevance of such techniques in the architecture industry.
Earthquake
This document discusses techniques for making buildings earthquake resistant. It covers base isolation, which involves supporting a building on bearing pads to allow flexibility during earthquakes. It also discusses energy dissipation devices like friction dampers, metallic dampers, and viscoelastic dampers that can absorb seismic energy. The document provides details on how each technique works and their advantages, such as reducing displacement and maintaining structural performance during earthquakes. It concludes that base isolation and friction dampers are commonly used techniques for earthquake-resistant construction.
Curtain walls
Curtain walls are non-load bearing exterior walls that hang from the building structure. They allow for larger windows and more open floor plans compared to load bearing walls. Common materials for curtain walls are glass and aluminum due to their strength, light weight, and ability to limit heat transfer. Curtain walls are classified based on their method of construction, with common types being stick wall, unitized wall, and window wall systems. Proper design of curtain wall systems is important to handle loads, transfers stresses to the building structure, and prevents air and water infiltration.
Earthquake resistant structure
hie guys
Its a small presentation on Earthquake Resistant Structures
some basic fundamentals about its causes its effect and few techniques to resist it..
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Simple Presentation Of BASE ISOLATION
- 2. EARTHQUAKE is the shaking of the surface of the Earth
- 3. BASE ISOLATION is one of the most popular means of protecting a structure against earthquake forces
- 4. TYPES OF BASE ISOLATORS Elastomeric Rubber Bearing :Bearing formed by horizontal layers of synthetic/natural rubber in thin layers bound between steel plates.
- 5. TYPES OF BASE ISOLATORS High Density Rubber Bearing: This is another type of elastomeric bearings
- 6. TYPES OF BASE ISOLATORS Friction Pendulum System: It is sliding type system of isolation
- 7. LOCATION OF BASE ISOLATORS The most common configuration is to install a diaphragm immediately above the isolators. If the structure has basement is structure then the options are to install the isolators at top, bottom & mid-hit of the basement columns & walls.
- 8. ADVANTAGES OF BASE ISOLATED The most important advantages lie in the fact that it protects the structure from seismic activities The structures with base isolators are more predictable & hence they have high reliability as compared to conventional structures. In large seismic forces, the damage is concentrated in isolation systems where the elements can be substituted easily.
- 9. DISADVANTAGESOF BASE ISOLATED It is less efficient for high rise buildings. It requires highly skilled labors & engineer for its implementation. It can be applied partially to structures It can be done on the structures resting on soft soils.
- 10. APPLICATIONS LA city hall in the tallest base isolated building in the world
- 11. THANK YOU