Performance-based seismic design for retrofitting of bridge bents
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Chowdhury, Abu Obayed
issued: 2025-10-25T07:00:00Z
issued: 2024
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: An intended performance of a structure under different seismic hazard levels can be obtained by applying the performance-based seismic design (PBSD) approach. Various performance levels and the respective limit states need to be set for employing PBSD. These limit states corresponding to different performance levels are unavailable in the latest codes and guidelines for existing seismically deficient bridges. Being major components, multi-column bents have notable effects on the seismic behaviour of these bridges. Thus, a typical deficient bent is retrofitted with different alternatives such as carbon fibre-reinforced polymer (CFRP), steel, engineered cementitious composite (ECC), and concrete jackets, and the development of limit states for each alternative is sought in this research. Incremental dynamic analyses were performed to come up with the limit states expressed in terms of limiting drifts and damage indices for different performance levels of retrofitted bents. A detailed example has been developed to demonstrate a retrofit design for achieving the target seismic performance with the proposed damage states. Fragility analysis was conducted to achieve the conditional probabilities of exceeding various damage states at different hazard levels under various earthquake scenarios. The effects of various performance-based damage states and earthquake sources on the life-cycle cost and seismic resilience were assessed for retrofitting a deficient bridge bent in this research. Performance-based seismic loss and seismic resilience assessments of as-built bent and bents retrofitted with different retrofit options were executed for life-cycle performance comparison and optimum retrofitting technique selection. ECC jacketed bent had the least crushing probability in most situations. CFRP and steel jacketed bents were subjected to the smallest and highest seismic losses, respectively. ECC jacket was selected as the optimum option for retrofitting the deficient bent bec…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/89710
note: PERFORMANCE-BASED SEISMIC DESIGN FOR RETROFITTING OF BRIDGE BENTS by Abu Obayed Chowdhury M.E.Sc., Western University, 2007 B.Sc., Bangladesh University of Engineering and Technology, 2005 A DISSERTATION SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in THE COLLEGE OF GRADUATE STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) November 2024 © Abu Obayed Chowdhury, 2024 ii The following individuals certify that they have read, and recommended to the College of Graduate Studies for acceptance, the dissertation entitled: Performance-Based Seismic Design for Retrofitting of Bridge Bents submitted by Abu Obayed Chowdhury in partial fulfillment of the requirements for the degree of Doctor of Philosophy. Dr. M. Shahria Alam, School of Engineering Supervisor Dr. A.H.M. Muntasir Billah, University of Calgary Co-supervisor Dr. Kasun Hewage, School of Engineering Supervisory Committee Member Dr. Abbas Milani, School of Engineering Supervisory Committee Member Dr. Jian Liu, School of Engineering University Examiner Dr. Khaled Sennah, Toronto Metropolitan University External Examiner iii ABSTRACT An intended performance of a structure under different seismic hazard levels can be obtained by applying the performance-based seismic design (PBSD) approach. Various performance levels and the respective limit states need to be set for employing PBSD. These limit states corresponding to different performance levels are unavailable in the latest codes and guidelines for existing seismically deficient bridges. Being major components, multi-column bents have notable effects on the seismic behaviour of these bridges. Thus, a typical deficient bent is retrofitted with different alternatives such as carbon fibre-reinforced polymer (CFRP), steel, engineered cementitious composite (ECC), and concrete jackets, and the development of limit states for each alternative is sought in this research. Incremental dynamic analyses were …
has type: Thesis/Dissertation
date issued: 2025-02
is shown at: 10.14288/1.0447324
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Billah, A.H.M. Muntasir
type: Text
type: Still Image
identifier URI: http://hdl.handle.net/2429/89710