Many structures have their fundamental frequencies of vibration within the range
of frequencies where the energy of most of the earthquake ground motions is a maximum. In such cases a structure will amplify the ground vibrations and produce accelerations, which increases from the base of the structure to its top. Besides producing undesirable levels of acceleration in the structure, these amplified structural motions can cause large stresses in structural elements and large relative displacements between different parts of the structure. This ....etc

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Bridges are lifeline structures. They act, as an important page link in surface transportation network and failure of bridges during a seismic event will seriously hamper the relief and rehabilitation work. There are many cases of damage of bridges in the past earthquakes all over the world. Due to their structural simplicity, bridges are particularly vulnerable to damage and even collapse when subjected to earthquakes. The fundamental period of vibration of a majority of bridges is in the range of 0.2 to 1.2 second. In this range, the structur ....etc

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SEISMIC RETROFITTING OF CONCRETE BUILDINGS

SEISMIC RETROFITTING

NEED FOR RETROFITTING

BUILDING DEFICIENCIES

STEPS TAKEN PRIOR TO RETROFITTING


NEED FOR RETROFITTING


MAKES BUILDING SAFER AND LESS PRONE TO DAMAGE

CONSTUCTION TECHNIQUES ARE IMPROVED

DURABILITY AND AESTHETIC APPEARANCE ARE REDUCED
AFTER DAMAGE

DEMANDS ON EXISTING STRUCTURES ARE INCREASING

UNEXPECTED EXTRA LOADS ARE TO BE CARRIED

MAKES IMPROVEMENTS TO AN ....etc

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Abstract:
This seminar is intended to evaluate the applicability of Nonlinear Static Procedure by implementing the Displacement Coefficient Method to bridges. For comparison purposes, the Nonlinear Dynamic Procedure (or nonlinear time-history analysis), which is considered to be the most accurate and reliable method of nonlinear seismic analysis, is also performed. A three-span bridge of 97.5 meters (320 ft) in total length was analyzed using both the Nonlinear Static Procedure/Displacement Coefficient Method and nonlinear time-history. Nine ....etc

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Bridges are lifeline structures. They act, as an important page link in surface transportation network and failure of bridges during a seismic event will seriously hamper the relief and rehabilitation work. There are many cases of damage of bridges in the past earthquakes all over the world. Due to their structural simplicity, bridges are particularly vulnerable to damage and even collapse when subjected to earthquakes. The fundamental period of vibration of a majority of bridges is in the range of 0.2 to 1.2 second. In this range, the structur ....etc

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Many structures have their fundamental frequencies of vibration within the range
of frequencies where the energy of most of the earthquake ground motions is a maximum. In such cases a structure will amplify the ground vibrations and produce accelerations, which increases from the base of the structure to its top. Besides producing undesirable levels of acceleration in the structure, these amplified structural motions can cause large stresses in structural elements and large relative displacements between different parts of the structure. This ....etc

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Abstract:
In this seminar the analysis of soil-structure interaction effects and of multiple support excitation on the seismic response of long-span cable-supported bridges are presented. The purpose of this seminar is to provide a better understanding of the dynamic performance of cable supported bridges under earthquake excitation, considering the spatial variability of the ground motion and the complex phenomena of soil-bridge interaction, so that such effects can be included in the design and rehabilitation process. Amplification of struct ....etc

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Abstract:
A seismic loss curve of a real-world building is obtained by means of state-of-the-art models for the impending ground motion, the structure, the damage of structural and nonstructural components, and the ensuing losses. In particular, the seismic hazard at the buildingâ„¢s location _Vancouver, Canada_ is described by a comprehensive probabilistic model. It is argued that this ground motion model is particularly appropriate in reliability analysis compared with the more common utilization of a limited set of scaled ground moti ....etc

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RISK BASED METHODOLOGY OF ASSESSING THE SEISMIC PERFORMANCE OF HIGHWAY SYSTEM
Presented by :
Chukhu Tacho
SCOPE OF THE SEMINAR
Introduction.
Methodology Description.
Recent developments of the methodology.
Demonstration Application.
Conclusion.
References.
INTRODUCTION
FUNCTIONS AND OBJECTIVES
Functions.
To estimate the damages caused by earthquake to highway system.
To provide cost and risk information for the future strategies planning.
To enable engineers to consider effects of EQ to highway system ....etc

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please send me ppts and complete document for seismic alert through gsm network technology(document should contain 40-50 pages) ....etc

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