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Innovative methods to improve the seismic performance of precast segmental and hybrid bridge columns under cyclic loading

Badar, Jahangir; Umar, Tariq; Akbar, Muhammad; Abbas, Nadeem; Shahzad, Qamar; Chen, Weizhen; Arshid, Muhammad Usman

Innovative methods to improve the seismic performance of precast segmental and hybrid bridge columns under cyclic loading Thumbnail


Authors

Jahangir Badar

Profile image of Tariq Umar

Dr. Tariq Umar Tariq.Umar@uwe.ac.uk
Senior Lecturer in Construction Project Management

Muhammad Akbar

Nadeem Abbas

Qamar Shahzad

Weizhen Chen

Muhammad Usman Arshid



Abstract

This paper investigates the seismic performance of prefabricated segmental bridge columns (PSBCs) with hybrid post-tensioned tendons and energy dissipation (ED) bars under cyclic loading. PSBCs with unbonded and hybrid bonded prestressed tendons and columns incorporating ED bars are designed to improve the lateral strength, energy dissipation, and limit the residual drift. The PSBCs under cyclic loading were investigated using the three-dimensional finite element (FE) modeling platform ABAQUS. The FE model was calibrated against experimental results, with an overall error of less than 10%. The seismic performance of the proposed PSBCs was evaluated based on critical parameters, including lateral strength, residual plastic displacement, and the energy dissipation capacity. The results show that bonding the tendons in the plastic hinge region as opposed to the overall bonding along the column leads to a better cyclic performance. The lateral strength, and recentering abilities are further improved by bonding tendons up to 2/3 of the length in the plastic hinge region, along with 100–300 mm in the footing. It was also found that selecting a longitudinal length of ED bars crossing multiple precast segmental joints and having a circumferential spread of 70–90% of core concrete results in a higher bearing capacity and energy dissipation compared to ED bars crossing the single joint.

Journal Article Type Article
Acceptance Date May 22, 2024
Online Publication Date May 31, 2024
Publication Date Jun 1, 2024
Deposit Date May 31, 2024
Publicly Available Date Jun 6, 2024
Journal Buildings
Electronic ISSN 2075-5309
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 14
Issue 6
Article Number 1594
DOI https://doi.org/10.3390/buildings14061594
Keywords prefabricated segmental bridge columns; seismic performance; numerical analysis; hybrid bonded tendons; ED bars; parameter analysis
Public URL https://uwe-repository.worktribe.com/output/12030960
Publisher URL https://www.mdpi.com/2075-5309/14/6/1594

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