Numerical Analyses on Seismic Performance of Precast Segmental Prestressed Bridge Columns

被引：0

作者：

Zhang K. ^{[1
]}

Jia J. ^{[1
]}

Guo T. ^{[3
]}

Cheng S. ^{[2
]}

Fan P. ^{[2
]}

机构：

[1] Key Lab. of Urban Security and Disaster Eng. of Ministry of Education, Beijing Univ. of Technol., Beijing

[2] Key Lab. of Transport Industry of Bridge Detection Reinforcement Technol. (Beijing), Beijing

[3] Key Lab. of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast Univ., Nanjing

来源：

Gongcheng Kexue Yu Jishu/Advanced Engineering Sciences | 2022年 / 54卷 / 06期

关键词：

area of prestressed tendons; initial prestressing level of prestressed tendons; precast segmental prestressed bridge column; reinforcement ratio of energy dissipation bars; seismic performance;

D O I：

10.15961/j.jsuese.202100905

中图分类号：

学科分类号：

摘要：

Precast segmental prestressed bridge columns have been widely applied in the region of medium and low seismicity in the United States, however, there are few applications in China. Due to the lack of seismic damage data and insufficient knowledge of their seismic performance, their application in high seismicity is limited. According to the existing quasi-static test of precast segmental prestressed bridge columns, the numerical model of the precast column under bending load was developed by software ABAQUS and the nonlinear behavior was verified by experimental results. Based on the verified numerical model, influences of three parameters, namely reinforcement ratio of energy dissipation (ED) bars, area of prestressed tendons and initial prestressing level on seismic performance of precast segmental columns were investigated. The results show that the results of the model are in good agreement with the experimental results. With the increase in the reinforcement ratio of ED bars, the energy dissipation capacity bearing capacity, and residual displacement increase severely. As the area of the prestressed tendon increases, the bearing capacity and post-yield stiffness increase significantly, whereas the energy dissipation capacity decreases. With the increase of the initial prestressing level, the bearing capacity of the column increases, but the damage at the bottom of the precast columns is more severe. Therefore, when the target displacement drift is less than 4%, the initial prestressing level should be less than 50% of the ultimate tensile strength of prestressed tendons to avoid serious concrete damage, and the reinforcement ratio of ED bars should be less than 1% to achieve quick repair of columns after an earthquake. The research results could provide technical support for the seismic design of precast segmental prestressed bridge columns and their application in strong earthquake areas. © 2022 Editorial Department of Journal of Sichuan University. All rights reserved.

引用

页码：176 / 184

页数：8

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