Reliability-based Seismic Assessment and Optimum Design of Bridges
碩士 === 國立臺北科技大學 === 土木與防災研究所 === 102 === The existing bridges in Taiwan are inevitably threatened by earthquake shock. How to study failure probability of the bridges is important. Conventional seismic design of bridge by deterministic analysis is unable to consider the uncertainties in both seismic...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2014
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| Online Access: | http://ndltd.ncl.edu.tw/handle/3pafmc |
| Summary: | 碩士 === 國立臺北科技大學 === 土木與防災研究所 === 102 === The existing bridges in Taiwan are inevitably threatened by earthquake shock. How to study failure probability of the bridges is important. Conventional seismic design of bridge by deterministic analysis is unable to consider the uncertainties in both seismic demand and structural capacity. Developing the reliability-based seismic assessment and design of bridges revealing the failure probability corresponding to various earthquake level is the core of this thesis.
Twenty-seven experimental results of cyclic loading test of reinforced concrete column were served as the statistical study of pushover analysis conducted by software of SERCB for Bridge 2012 associated with SAP2000. Accordingly, the variance of structural capacity determined by analysis is able to be calculated. On the other hand, statistical analyses of seismic hazard curves at different sites were performed to find variance of seismic demands with respect to different earthquake levels.
According to the above study, this thesis carried out two main reliability-based applications to bridges. The first one is to propose a realistic approach to evaluate the reliability indices as well as failure probabilities of the existing bridges corresponding to three earthquake levels. The second one is to develop an GA-based optimal design method of the bridge pier with the reliability index prescribed. The results obtained show that the proposed method can fulfill the reliability-based seismic assessment and optimum design of bridges.
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