International Scientific Journal of Engineering and Management

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SEISMIC ANALYSIS AND RETROFITTING OF BRIDGES BY USING FRAGILITY CURVES

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SEISMIC ANALYSIS AND RETROFITTING OF BRIDGES BY USING FRAGILITY CURVES

RAJKAMAL D H1, ASHWINI SATYANARAYANA2 ,PRAKASH.P3

1Student, Department of Civil Engineering, Dayanand Sagar College of Engineering, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru, Karnataka 560078, India

2Assistant Professor, Department of Civil Engineering, Dayanand Sagar College of Engineering, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru, Karnataka 560078, India

3Professor , Department of Civil Engineering, Dayanand Sagar College of Engineering, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru, Karnataka 560078, India

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Abstract -

Bridges, integral to transportation networks, face significant challenges from seismic events, impacting infrastructure resilience and public safety. This study focuses on developing fragility curves for bridges, providing a quantitative link between ground motion intensity and structural damage probability. Fragility curves offer insights into seismic vulnerability, considering factors like structural design, material properties, and local seismic conditions. The research explores various fragility curve development methods, emphasizing analytical approaches, and details Incremental Dynamic Analysis (IDA) as a vital tool. IDA, a parametric structural analysis, is employed to forecast bridge seismic responses, facilitating the derivation of fragility curves. The methodology guides bridge-specific IDA, involving seismic hazard assessment, structural modeling, and performance metric identification. By systematically evaluating fragility curves and considering retrofitting options, informed decisions can enhance the seismic resilience of bridges, contributing to the broader field of seismic risk assessment and infrastructure resilience.

 

Key Words:  resilience, Incremental Dynamic Analysis, retrofitting.

 


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