International Scientific Journal of Engineering and Management

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SEISMIC RETROFITTING OF RC BRIDGES BY USING FRAGILITY CURVES

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 SEISMIC RETROFITTING OF RC BRIDGES BY USING FRAGILITY CURVES 

RAJKAMAL D H1, PRAKASH.P2, ASHWINI SATYANARAYANA3

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

2HOD, Department of Construction technology management, 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 -This paper discusses the evaluation of seismic vulnerability of bridges using fragility curves. It details how fragility curves offer a likelihood of a structure suffering damage beyond a particular damage threshold for different levels of ground motion. Moreover, the paper explores how fragility curves at the system level can yield a more comprehensive assessment of a structure's vulnerability by considering the interactions and dependencies among its different elements. Retrofitting techniques for bridges such as strengthening, base isolation, ductility detailing, displacement allowance, tuning, or re-articulating, and energy dissipation are also discussed. The paper reviews some recent studies, including the assessment of the seismic vulnerability of a benchmark structure and the investigation of the seismic damage of a reinforced concrete skewed bridge under a sequence of earthquake ground motions. Finally, the research discusses a set of papers on fragility functions and retrofitting techniques that can be utilized to evaluate and reduce the potential risks posed by earthquakes.

 

Key Words:  base isolation, ductility detailing, energy dissipation

 


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