Base isolation system consists of isolation units with or without isolation components, where: Isolation units are the basic elements of a base isolation system which are intended to provide the aforementioned decoupling effect to a building or non-building structure. Isolation components are the ...
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Base isolation system consists of isolation units with or without isolation components, where: Isolation units are the basic elements of a base isolation system which are intended to provide the aforementioned decoupling effect to a building or non-building structure. Isolation components are the ...
base isolation systems
base isolation system in building
base isolation pdf
base isolation definition
base isolation foundation
base isolation cost
base isolation techniques
base isolation pads
interesting civil engineering topics
civil engineering topics for presentation
civil seminar topics ppt
civil engineering seminar topics 2018
seminar topics pdf
best seminar topics for civil engineering
seminar topics for mechanical engineers
latest civil engineering seminar topics
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
Shuttering in concrete construction is used as a mould for a structure in which fresh concrete is poured to harden subsequently curing
It is a part of formwork, or you may call it as derivative of formwork. Shuttering is a vertical temporary arrangement which is arranged to bring concrete in a desired shape.orFormwork which supports vertical arrangement is known as shuttering.
General Information of Retaining Walls about its type, design and functionality; This file does not comprise of detail study of the Retaining Walls but for a startup it may help students!!!
Analysis and design of pre engineered building using is 800:2007 and Internat...Pratik R. Atwal
Abstract: In this report, comparison is made between IS800:2007 & International standards. The entire range of preengineered building is studied while doing this comparison. A school building is designed using IS800:2007 & International standards by keeping the loading parameters similar, all the loads are applied accordance with Indian codes. An attempt is made to study the variation in tonnage as per IS800:2007 & International standards & possible reasons for variation in respective results.
در سال های اخیر، محافظت از پی به شکل فزاینده ای، تبدیل به یک تکنیک طراحی کاربردی در سازه ساختمان ها و پل زلزله قرار دارند، گشته است. انواع گوناگونی از سازه ها با استفاده از این شیوه ساخته شده اند و بسیاری دیگر نیز در فاز طراحی قرار داشته و یا در حال ساخت هستند. اغلب ساختمان های تکمیل شده و آنهایی که در حال ساخت هستند، به شکلی از اسباب حفاظتی لاستیکی در سیستم های خود بهره می برند.
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
Shuttering in concrete construction is used as a mould for a structure in which fresh concrete is poured to harden subsequently curing
It is a part of formwork, or you may call it as derivative of formwork. Shuttering is a vertical temporary arrangement which is arranged to bring concrete in a desired shape.orFormwork which supports vertical arrangement is known as shuttering.
General Information of Retaining Walls about its type, design and functionality; This file does not comprise of detail study of the Retaining Walls but for a startup it may help students!!!
Analysis and design of pre engineered building using is 800:2007 and Internat...Pratik R. Atwal
Abstract: In this report, comparison is made between IS800:2007 & International standards. The entire range of preengineered building is studied while doing this comparison. A school building is designed using IS800:2007 & International standards by keeping the loading parameters similar, all the loads are applied accordance with Indian codes. An attempt is made to study the variation in tonnage as per IS800:2007 & International standards & possible reasons for variation in respective results.
در سال های اخیر، محافظت از پی به شکل فزاینده ای، تبدیل به یک تکنیک طراحی کاربردی در سازه ساختمان ها و پل زلزله قرار دارند، گشته است. انواع گوناگونی از سازه ها با استفاده از این شیوه ساخته شده اند و بسیاری دیگر نیز در فاز طراحی قرار داشته و یا در حال ساخت هستند. اغلب ساختمان های تکمیل شده و آنهایی که در حال ساخت هستند، به شکلی از اسباب حفاظتی لاستیکی در سیستم های خود بهره می برند.
Effect of base isolation in multistoried rc irregular building using time his...eSAT Journals
Abstract Base isolation (BI) is a technique that has been used around the world to protect the building structures from the damaging effects of earthquake. The installation of isolator in building at base level significantly increases the time period of the structure, which means it reduces the possibility of resonance of the structure giving rise to better seismic performance of the building. The study is performed to compare the effectiveness of base isolation in plan irregular and vertical irregular multi-storied RC frame building. For this study, 15 storied R.C frame building is considered and Time History analysis is carried out using ETABS 2013 software. The Lead Rubber Bearing (LRB) is designed as per UBC 97 code and the same was used for analysis of base isolation system. The results obtained from the analysis were time period and base shear. Time period for the base isolated structures are higher than that of the fixed base structure. Due to the presence of isolator, Base shear is significantly reduced in each direction (X and Y direction) as compared to fixed base building. It has been found that when compared to plan irregular base isolated building the vertical irregular building gives better performance in high seismic prone area by using isolators at the base of the building.
Keywords: Base isolation, Lead rubber bearing, Time history analysis, Irregular building
Seismic base isolation in strengthening an existing retrofitted masonry reinf...eSAT Journals
Abstract Seismic base isolation is a fast advancing technology in which the superstructure is isolated from the entire structure or from the substructure by means of rubber bearing isolators or frictional sliding isolators. The main aim of the base isolation technology is to isolate the structure from the harmful effects of the ground accelerations or earthquake excitations. In this paper, the procedure for the selection of the three ground motions is briefly explained and they are used in analyzing a masonry – reinforced concrete office building for the Internal Revenue Service in the Huating County of the Pingliang City in China. The structure is first analyzed with the PKPM software to ascertain the structural internal forces are within reasonable limits but because this software cannot be used to advance analysis in the area of base isolation, Sap 2000 is used to remodel the structure, analyze, then apply the seismic base isolation. This office building has been strengthened to be fortified against ultimate bearing capacity failure as it is an existing structure. The lead rubber bearing isolators, LRB 400, LRB 500 and LRB 600 are used to isolate the building model and results from the structural response are compared, first amongst the time histories and then between the enveloped time histories and the response spectrum. The floor joint accelerations are observed to be reduced and the joint velocities as well, whereas the floor joint displacements are increased. The response spectrum alone is seen to not be an enough ground acceleration parameter in a seismic analysis and design of this model; as such it is recommended to include time history analysis. The maximum percentage decrease in acceleration and velocity can be seen occurring in the response spectrum, namely, 85.82% and 59.76%, respectively. The maximum percentage increase in the displacement is also evident in the response spectrum, 57.59%. In the time histories, the maximum is seen in Ec County Y-direction for the acceleration reduction at a value of 60.57%; Delta artif records a maximum velocity reduction of 28.42% in the Y-direction and finally, the Delta artif X-direction also records a maximum displacement increment, at a value of 26.36%.
ELASTOMERIC BASE ISOLATION SYSTEM FOR SEISMIC MITIGATION OF LOW-RISE STRUCTURESIAEME Publication
Seismic base isolation is a passive way of achieving seismic response control by introducing isolators between foundation and super structure. Isolator performs three functions: horizontal flexibility, energy dissipation and rigidity against normal lateral loads. Lead Rubber bearing isolators
performs these functions efficiently. By reducing the horizontal stiffness of the system, it increases the time period of the structure and decreases the spectral acceleration of the structure. The superstructure acts like a rigid body, thus inter storey drift is reduced. Such type of isolators are used
in practice in India, yet a proper design procedure based on IS code is unavailable. The paper presents design procedure for LRB adopting the procedure of IS 1893:2002 (Part-1) for earthquake resistant design of buildings.
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.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
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However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Generating a custom Ruby SDK for your web service or Rails API using Smithyg2nightmarescribd
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Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
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Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
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In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
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LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
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Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
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2. Conventional Construction Practice
assumes Fixed Base Structures
The Dynamic Characteristics of Fixed Base Structures are
determined by the general characteristics of the structural
system
The Designer can only slightly adjust those Dynamic
Characteristics
As a matter of fact, most common Building Structures have
unfavorable Dynamic Characteristics that result in increased
Seismic Response
3. Earthquake Performance of Fixed
Base Structures
Conventional Fixed Base Structures can not be realistically
designed to remain elastic in large seismic events (more so
in regions of high seismicity)
Common practice is to design them so that they experience
damage in a controlled manner and have large inelastic
displacements potential
4. Unconventional Earthquake
Protective Systems
Base Isolation is the most common System
Earthquake Protective Systems
Passive Protective Systems Hybrid Protective Systems Active Protective Systems
Tuned Mass Damper
Energy Dissipation
Base Isolation
Active Isolation
Semi-Active Isolation
Semi-Active Mass Damping
Active Mass Damping
Active Bracing
Adaptive Control
5. The Concept of Base Isolation
Fixed Base
Base Isolated
Period
Response
Significantly Increase
the Period of the
Structure and the
Damping so that the
Response is
Significantly Reduced
6. Base Isolation in Buildings
Original Structure Isolated Structure
Isolation at foundation level
7. Base Isolation in Buildings
Isolator Components Between the Foundation and Superstructure
An Isolation Interface is formed
10. How exactly does Base Isolation
Work?
• Isolators have large
deformation potential
allowing for large drift on
the Isolation Interface
Most types of Isolators
exhibit nonlinear behavior
Lengthening of the Structure’s Period and increased
Damping that result in a large scale decrease of the
Seismic Response
11. Force – Displacement Relationship
at the Isolation Interface
actual hysteretic behavior viscoelastic idealization
12. Response of Base Isolated Buildings
versus Fixed Base Response
Drift on Isolation Interface
Reduced
Superstructure
Deformations
for Base
Isolated
Structure
13. Most Common Types of Isolation
Components (Isolators)
Isolation Devices
Elastomeric Isolators Sliding Isolators
Natural Rubber Bearings
Low-Damping Rubber Bearings
Lead-Plug Bearings
High-Damping Rubber Bearings
Resilient Friction System
Friction Pendulum System
18. Oakland City Hall
First high-rise government
office building in the United
States
Tallest Building on the
West Coast at the time of
its construction in 1914
-324 feet tall
Riveted Steel Frame with
infill masonry walls of brick,
granite and terracotta
Continuous Reinforced
Concrete Mat foundation
19. Oakland City Hall
Building was severely damaged during the 1989
Loma Prieta earthquake
Building is listed on the historic register – Retrofit
had to preserve the interior architecture and the
historic fabric of the building
Both conventional fixed-base and base isolation
retrofit concepts were studied
The most economical and effective method was
determined to be base isolation
20. Oakland City Hall
Isolation System:
111 rubber
isolation bearings
36 of them with
lead cores
Fixed Base Base Isolated
Earthquake Response
21. Oakland City Hall
Critical Construction Issues:
Temporary lateral bracing during construction period to
safeguard against possible earthquake occurrence
Symmetric work sequence was important to reduce the
possibility of torsional response in the event of an
earthquake
Vertical column displacement during jacking was
limited to around 0.10 inches to prevent damage to
superstructure finishes
22. San Francisco City Hall
Built in 1915
Today recognized as
one of the most
notable examples of
classical architecture
in the U.S.
Nearly 300 feet tall
Steel Frame with
concrete slabs
Spread interior
footings – Strip
perimeter foundation
23. San Francisco City Hall
The original design of the building incorporates a
“soft story” approach at the main floor, intended to
dissipate energy
This alongside other discontinuities in the
structural system make the dynamic
characteristics of the building unfavorable
The Building was severely damaged during the
1989 Loma Prieta earthquake
24. San Francisco City Hall
Four Retrofit Strategies were considered
Base Isolation
Fixed Base / Concrete Shear Walls
Fixed Base / Steel Braced Frames
Fixed Base / Steel Moment Frames
Flexible Story
27. San Francisco City Hall
Based on the results of the analysis, the
Base Isolation Scheme was selected as
best meeting the retrofit objectives and
providing the most favorable
performance for the least relative cost
Base Isolation is considered a particularly
effective strategy when applied to massive (and
rather stiff) structures