Seismic isolation and passive energy dissipation devices are advanced technologies used in housing construction to minimize seismic motion. Seismic isolation structures place quake-absorbing devices like laminated rubber in building foundations to block seismic motions from reaching the building, reducing intensity by up to 80%. Passive energy dissipation devices absorb and dissipate earthquake energy through components like viscous fluid dampers and friction dampers. Reinforced concrete cores running through buildings also increase seismic performance at lower cost. These advanced technologies enhance seismic resistance while reducing potential damage from earthquakes.
Structural systems in high rise building and analysis methodsDP NITHIN
This presentation is about the structural systems in tall buildings and also consists of overview of methods of analysis in tall buildings like linear and non linear seismic analysis.
A report format presentation of earthquake-resistance construction techniques, stressing upon the relevance of such techniques in the architecture industry.
The devastating Effects of earthquake is notable to all. Recently we all saw the destruction of nepal by the same. So if we increasing the resistance of building to earthquake we can reduce its effect as we cannot stop the earthquake!!!
It is the presentation based on pre- stressed concrete construction which includes each and every point and scope which may be useful to civil engineering students
Structural systems in high rise building and analysis methodsDP NITHIN
This presentation is about the structural systems in tall buildings and also consists of overview of methods of analysis in tall buildings like linear and non linear seismic analysis.
A report format presentation of earthquake-resistance construction techniques, stressing upon the relevance of such techniques in the architecture industry.
The devastating Effects of earthquake is notable to all. Recently we all saw the destruction of nepal by the same. So if we increasing the resistance of building to earthquake we can reduce its effect as we cannot stop the earthquake!!!
It is the presentation based on pre- stressed concrete construction which includes each and every point and scope which may be useful to civil engineering students
Earthquake resistant building constructiondaspriyabrata3
1 INTRODUCTION
2 EARTHQUAKE THEORY
3 EARTHQUAKE MAGNITUDE AND ENERGY
4 EFFECTS OF EARTHQUAKES
5 MAJOR EARTHQUAKES
6 NOTABLE EARTHQUAKES AND THEIR ESTIMATED
MAGNITUDE
7 HOW EARTHQUAKE RESISTANT CONSTRUCTION IS
DIFFERENT
8 SEISMIC DESIGN PHILOSOPHY
9 EFFECT OF EARTHQUAKE ON REINFORCED CONCRETE BUILDINGS
10 ROLES OF FLOOR AND MASONRY WALLS SLABS
11 STRENGTH HIERARCHY
12 EARTHQUAKE RESISTANT BUILDING
13 EARTHQUAKE DESIGN PHILOSOPHY
14 REMEDIAL MEASURES TO MINIMISE THE LOSSES DUE TO EARTHQUAKES
15 EARTHQUAKE RESISTANT BUILDING CONSTRUCTION WITH REINFORCED HOLLOW CONCRETE BLOCK(RHCBM)
16 STRUCTURAL FEATURES
17 STRUCTURAL ADVANTAGES
18 CONSTRUCTIONAL ADVANTAGES
19 ARCHITECTURAL AND OTHER ADVANTAGES
20 STUDIES ON THE COMPARATIVE COST ECONOMICS OF RHCBM
21 MID-LEVEL ISOLATION 32-34
22 EARTHQUAKE RESISTANCE BUILDING USING SEISMIC ISOLATION SYSTEMS WITH SLIDING ON CONCAVE SURFACE
23 DESCRIPTION
24 CONCEPT OF FRICTION PENDULUM BEARING
25 SLIDING PENDULUM SEISMIC ISOLATION SYSTEM
26 BACKGROUND OF THE INVENTION
27 BRIEF SUMMARY OF THE INVENTION
28 DETAILED DESCRIPTION OF THE INVENTION
29 ESTIMATION
30 CONCLUSION
31 BIBLIOGRAPHY
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
Eatrhquake response of reinforced cocrete multi storey building with base iso...eSAT Journals
Abstract A seismic base isolation is an earthquake resistant design method that is based on reducing the seismic demand and also the ductility demand. The basic concept of base isolation system is to increase the natural time period of the fixed base building and to protect the structure from the seismic effect. The main purpose of this work is to study the dynamic response of structure when subjected to different isolators. For this purpose, a three dimensional response spectrum analysis and time history analysis is performed using a commercial structural analysis software package called as SAP 2000 to study the influence of isolation damping on building. The main objective is to make a comparison between the fixed base building and various isolation systems such as friction pendulum isolator, lead rubber bearing (LRB) isolator and high damping rubber isolator, subjected to strong earthquakes to achieve an optimal design of the base isolation system. SAP 2000, a popular large scale explicit finite element analysis software used to stimulate the behavior of base isolated structure. In the present work, it was found that base isolation substantially increases the time period of structure and hence correspondingly reduces the base shear. The top displacement for fixed and isolated cases conspicuously shows the reduction in the case of isolated frame. The study shows that the bending moment and shear force values are reduced for base isolated frame when compared to fixed base building. From design consideration the steel requirement is reduced in base isolated structures when compared to fixed base building. Key Words: Isolators, SAP2000
Seismic Retrofitting and repairs and rehabilitationsKumarS250747
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion or soil failure due to earthquakes.
There are several techniques which have come forward nowadays by which an existing structures can be modified and make it less prone to earthquakes.
There is no such technique to make the structure fully earthquake proof but seismic performance can be greatly enhanced through proper initial design or subsequent modifications.
Seismic analysis of low to medium rise building for base isolationeSAT Journals
Abstract
Seismic isolation is an alternative to conventional design methods for dealing with earthquake loadings in relatively high frequency
structures, especially in low to medium rise buildings. One of the goals of seismic isolation is to shift the fundamental frequency of the
structure away from the dominant frequencies of seismic excitations and fundamental frequency of the fixed base structure. This
innovative design approach aims mainly at the isolation of a structure from the supporting ground, usually in the horizontal directions
in order to reduce the transmission of the earthquake motion to the super structure.
In this paper seismic analysis performed for a low to medium rise fixed base building and it was observed that the fundamental time
period of the fixed system are typically in the resonance range of 0.1 sec. to 2.0 sec. This results in amplification of the ground
acceleration causing severe damage to structures and their contents. To avoid such a situation, the period must be lengthened, by
increasing the flexibility of the structure by introducing seismic base isolators between the foundation and super structures. A six
storey structure under both fixed base and seismically isolated boundary conditions is studied to demonstrate the effectiveness of
seismic isolation. The comparative result shows that maximum floor acceleration, inter-storey drifts and storey shear forces are
reduced substantially for seismically isolated structure.
Keywords: Seismic base isolation, Seismic resistant design, Lead rubber bearings, Response spectrum analysis, Time
period.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Seismic analysis of low to medium rise building for base isolation copyeSAT Journals
Abstract
Seismic isolation is an alternative to conventional design methods for dealing with earthquake loadings in relatively high frequency
structures, especially in low to medium rise buildings. One of the goals of seismic isolation is to shift the fundamental frequency of the
structure away from the dominant frequencies of seismic excitations and fundamental frequency of the fixed base structure. This
innovative design approach aims mainly at the isolation of a structure from the supporting ground, usually in the horizontal directions
in order to reduce the transmission of the earthquake motion to the super structure.
In this paper seismic analysis performed for a low to medium rise fixed base building and it was observed that the fundamental time
period of the fixed system are typically in the resonance range of 0.1 sec. to 2.0 sec. This results in amplification of the ground
acceleration causing severe damage to structures and their contents. To avoid such a situation, the period must be lengthened, by
increasing the flexibility of the structure by introducing seismic base isolators between the foundation and super structures. A six
storey structure under both fixed base and seismically isolated boundary conditions is studied to demonstrate the effectiveness of
seismic isolation. The comparative result shows that maximum floor acceleration, inter-storey drifts and storey shear forces are
reduced substantially for seismically isolated structure.
Keywords: Seismic base isolation, Seismic resistant design, Lead rubber bearings, Response spectrum analysis, Time
period.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
CW RADAR, FMCW RADAR, FMCW ALTIMETER, AND THEIR PARAMETERSveerababupersonal22
It consists of cw radar and fmcw radar ,range measurement,if amplifier and fmcw altimeterThe CW radar operates using continuous wave transmission, while the FMCW radar employs frequency-modulated continuous wave technology. Range measurement is a crucial aspect of radar systems, providing information about the distance to a target. The IF amplifier plays a key role in signal processing, amplifying intermediate frequency signals for further analysis. The FMCW altimeter utilizes frequency-modulated continuous wave technology to accurately measure altitude above a reference point.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
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Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
The Internet of Things (IoT) is a revolutionary concept that connects everyday objects and devices to the internet, enabling them to communicate, collect, and exchange data. Imagine a world where your refrigerator notifies you when you’re running low on groceries, or streetlights adjust their brightness based on traffic patterns – that’s the power of IoT. In essence, IoT transforms ordinary objects into smart, interconnected devices, creating a network of endless possibilities.
Here is a blog on the role of electrical and electronics engineers in IOT. Let's dig in!!!!
For more such content visit: https://nttftrg.com/
The Role of Electrical and Electronics Engineers in IOT Technology.pdf
advanced construction technology - seismic isolation & passive-energy dissipation devices.
1. ADVANCED TECHNOLOGIES IN
HOUSING CONSTRUCTION
Dr.Nagham Ali Hasan
3rd lecture
1st semester
2018-2019
1. seismic isolation
2. passive-energy
dissipation devices.
2. In order to minimize seismic motion, damping walls
that absorb seismic energy are constructed within
the building. Damping structures can be divided into
the Active type, which uses energy such as
electricity and the Passive type, which uses physical
forces.
Compared to earthquake resistant structure,
damping structure can reduce seismic intensity by
70-80%.
3. seismic isolation
For example, the sliding-belt
isolation scheme الزلزالي التصميم
was developed in Russia around
1975, with its first application in
Kyrgyzstan in 1982.
The disengaging reserve
elements (DRE) االحتياطية العناصر
المفككةwere developed in Russia
in 1970 and first applied in 1972.
The field of seismic design is a
subject that deals primarily with
life safety and uncertainty.
4. The building a massive and stiff construction would
make it earthquake resistant.
The stiffness or rigidity of the structural elements
would lead eventually to a fragile and sudden failure.
The increase of damping, redundancy of buildings,
ductility and seismic energy dissipation
زيادةالتخميد،والتكراروالليونةوالطاقةالزلزالية
were taken into consideration and well implemented
in seismic building codes.
5.
6. Damping
Structure
In order to minimize seismic motion, damping walls that
absorb seismic energy are constructed within the building.
Damping structures can be divided into the Active type,
which uses energy such as electricity and the Passive type,
which uses physical forces.
Compared to earthquake resistant structure, damping
structure can reduce seismic intensity by 70-80%.
Seismic Isolation
Structure
Commonly used for high-rise buildings as part of their foundation, this
structure places quake-absorbing devices (isolators) such as
laminated rubber that blocks seismic motions from reaching the
building. Quake-absorbing devices include laminated rubber, lead,
springs, dampers, ball bearings, etc. Furthermore, newly-invented
construction methods use a combination of these materials.
Seismic isolation structure can reduce seismic intensity down
anywhere from ⅓ to ⅕ (less than half) when compared to earthquake
resistant structure.
Earthquake
Resistant Structure
Seismic resistance structure allows main building structures,
namely, posts, walls and floors, to absorb seismic motions.
Buildings can be divided into Rigid Structure (constructed
rigidly in order to prevent collapse) and Flexible Structure
(the main structural parts of which bow flexibly in order to
spread the force of seismic motions).
9. SEISMIC ISOLATION
the technology idea is
to detach the building
from the ground in
such a way that the
earthquake motions
are not transmitted up
through the building, or
are at least greatly
reduced. Seismic isolation is a relatively new
approach in building design and is
based on the idea that it’s more
efficient to reduce the seismic
demand on a building rather than
increasing its earthquake
resistance capacity.
10. The base isolation:
increase the period of
vibration of a structure
(by increasing damping),
in order to reduce base
shear .
These characteristics
provide a reduction of the
considered seismic design
forces, therefore inter
story drifts are limited and
the risk of damage in
structural and non
structural building
elements is minimized.
11. theoretically, there would be no distribution and no amplification of
seismic forces, and therefore no inter-story drifts, this leading to
almost zero structural and non structural damage. A parallel
between a usual building and a base isolated one can be seen in
Figure 3 and Figure 4.
12. The principle of seismic isolation
is to introduce flexibility at the base of a structure
in the horizontal plane, while at the same time
introducing damping elements to restrict the
amplitude of the motion caused by the earthquake.
13. There are three basic elements in any
practical seismic isolation system. These
are as follows:
• A flexible mounting so that the period of vibration of
the total system is lengthened sufficiently to reduce the
force response
• A damper or energy dissipator so that the relative
deflections between building and ground can be
controlled to a practical design level
• A means of providing rigidity under low (service) load
levels, such as wind and minor earthquakes
من للحد الكفاية فيه بما اإلجمالي النظام اهتزاز فتره تطول بحيث مرن تصاعداستجابهالقوه
•مستو إلى واألرض المبني بين النسبية االنحرافات في التحكم يمكن بحيث الطاقة تبديد أو المثبطالعملي التصميم ي
•انخفاض ظل في الصالبة لتوفير وسيله(الخدمة)الصغيرة والزالزل الرياح مثل ، الحمل مستويات
14. The base isolated is
most applicable for
low-rise and medium-
rise buildings and
becomes less
effective for high-rise
structures.
15.
16. The applications of two
different isolation
systems:
1. Rubber-based isolation
system
2. Sliding-belt isolation
system
Rubber-based isolation system
1. The system consists of
laminated rubber bearings
2. The isolators are reinforced by
thin steel sheets.
3. The isolators are installed on
top of the basement walls or
the columns, or at the plinth
Building elevation showing the
locations of sliding bearings
(undercolumns) and vertical
stops
17. Sliding-belt isolation
systems: are installed at the
base of the building between the
foundation and the superstructure.
The sliding belt consists of the
following elements:
(a) sliding supports
(b) reinforced rubber restraints for
horizontal displacements
(horizontal stop),
(c) restraints for vertical
displacements (uplift)–vertical
stops.
18. PASSIVE ENERGY DISSIPATION DEVICES
The basic function in a building is to absorb or
consume a portion of the earthquake input energy,
thereby reducing energy dissipation demand on primary
structural members and minimizing structural damage.
The means by which the energy is dissipated is
either through:
1. the yielding of mild steel,
2. sliding friction,
3. motion of a piston or a plate within a viscous fluid,
4. motion of an orificed viscous fluid device, or
5. viscoelastic action of polymeric materials.
19. The most common types of passive devices
include :
1. viscous fluid dampers,
2. friction dampers,
3. metallic dampers, and
4. tuned mass dampers.
These devices can be effective against wind motions
as well as against earthquakes
critical structural details of the system
Typical building with DRE system in
Ukraine