Evaluation of seismic performance of highway bridge system by Multi-State System approach

2007 ◽  
pp. 211-220
Keyword(s):  
Seismic Performance ◽  
System Approach ◽  
State System ◽  
Highway Bridge ◽  
Bridge System

Seismic fragility models of a bridge system based on copula method

2021 ◽  
pp. 875529302110525
Author(s):  
Libo Chen ◽  
Caigui Huang ◽  
Haiqiang Chen ◽  
Zhenfeng Zheng
Keyword(s):  
Seismic Performance ◽  
Marginal Distribution ◽  
Fragility Curves ◽  
Distribution Functions ◽  
System Level ◽  
Likelihood Method ◽  
Seismic Fragility ◽  
Distribution Model ◽  
Copula Models ◽  
Bridge System

Seismic fragility assessment widely uses a probabilistic measure for assessing the seismic performance of structural components or systems. This article proposes a copula-based seismic fragility (CBSF) method to derive the system-level damage probabilities of reinforced concrete bridges and to consider the correlation among seismic demands of components. First, the marginal distribution functions of the random variables are calibrated, and three Archimedean copula models are considered. Subsequently, the relevant parameters of the copula models are estimated using the semi-parametric maximum likelihood method. Next, the damage probabilities of a bridge system are calculated based on the joint distribution model with the most suitable copula model and the calibrated marginal distribution functions. Finally, the CBSF method is used to estimate the damage probability of a simply supported box girder bridge. The performance of the CBSF method is validated by a comparison of fragility curves obtained using the CBSF method and the probabilistic seismic demand analysis (PSDA) method. The comparative results demonstrate that the fragility curves obtained by the CBSF method are better than those obtained using the PSDA method. The proposed CBSF model can serve as a tool for assessing the seismic performance of structures and estimating the economic loss of existing bridge systems.

Assessment of the historic seismic performance of the New Zealand highway bridge stock

2020 ◽  
pp. 1-13
Author(s):  
Shong Wai Lew ◽  
Liam Wotherspoon ◽  
Lucas Hogan ◽  
Moustafa Al-Ani ◽  
Pavan Chigullapally ◽  
...  
Keyword(s):  
New Zealand ◽  
Seismic Performance ◽  
Highway Bridge
Sign in / Sign up

Export Citation Format

Share Document