Seismic Damage Assessment of Prestressed Precast Segmental Piers Based on Material Strain

被引：0
作者：
Wang J. [1 ,2 ]
Ding S. [1 ]
Yang B. [3 ]
Peng T. [1 ]
Guan Z. [4 ]
Guo J. [1 ,5 ]
机构：
[1] School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang
[2] Key Laboratory of Roads and Railway Engineering Safety Control, Ministry of Education, Shijiazhuang Tiedao University, Shijiazhuang
[3] Engineering Management Center, China National Railway Group Limited, Beijing
[4] State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai
[5] State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2021年 / 43卷 / 12期
关键词：
Material damage; Prestressed precast segmental piers; Pseudo static test; Seismic damage assessment;
D O I：
10.3969/j.issn.1001-8360.2021.12.015
中图分类号：
学科分类号：
摘要：
In order to study the seismic damage performance of prestressed precast segmental (PPS) piers, firstly, based on the pseudo static test data, the damage evolution process and failure characteristics of PPS piers under cyclic horizontal loads were analyzed, and seismic damage mechanism of PPS piers was clarified. Then a damage assessment model based on damage of materials and degradation of stiffness was established by using the constitutive relation of damaged materials, to evaluate the damage of three test piers. Finally, the accuracy and applicability of the damage assessment method based on material strain for the PPS piers were verified by comparing with the results of stiffness degradation model at the component level and those of quasi-static tests. The results show that the seismic failure of PPS piers presents mainly three types: the compression failure of the joint concrete at the bottom of piers, the buckling or fracture of the energy dissipating reinforcement bars and the shear failure of the joints. The proposed damage assessment method based on damage of materials and degradation of stiffness for PPS piers can accurately assess the damage of integral piers, reasonably reflect the influence of prestressed tendons and segmental details on the damage of piers, and accurately evaluate the damage evolution trend of PPS piers. © 2021, Department of Journal of the China Railway Society. All right reserved.
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页码：121 / 129
页数：8
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