[1]LIU De'an,DING Mingbo,LU Jinhua,et al.Experimental Study on the Seismic Behaviour of the Gravity Railway Bridge Pier Strengthened with Unbonded RC[J].Journal of Seismological Research,2022,45(03):399-404.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0038
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Experimental Study on the Seismic Behaviour of the Gravity Railway Bridge Pier Strengthened with Unbonded RC
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
45
Number of periods:
2022 03
Page number:
399-404
Column:
生命线工程系统抗震防灾专栏
Public date:
2022-06-20
- Title:
- Experimental Study on the Seismic Behaviour of the Gravity Railway Bridge Pier Strengthened with Unbonded RC
- Keywords:
- quasi-static test; gravity railway bridge pier; seismic performance; post-earthquake reinforcement; unbonded RC
- CLC:
- U448.13; P315.9
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2022.0038
- Abstract:
- In order to study the seismic performance of the damaged gravity bridge pier of railways strengthened by unbonded RC,a scale model of the pier with reinforcement ratio of 0.2% is made,and a pseudo-static test on the pier is carried out.Low-cycle reciprocating load tests on the model are carried out before and after reinforcement,and the seismic performance indexes of the pier before and after reinforcement,such as hysteretic curve,skeleton curve,stiffness degradation and residual displacement of pier top,are compared and analyzed.The results show that:Local reinforcement of pier bottom with unbonded RC can effectively improve the energy dissipation capacity of the pier,thus keeping the failure surface from transferring to the unreinforced area.By unbonded RC reinforcement,the residual displacement of the pier top becomes small,and the strength,bearing capacity,stiffness and displacement ductility of the pier model are improved to a certain degree.The unbonded RC reinforcement can significantly improve the seismic performance of the gravity bridge pier of railways.This approach can serve as a reference for the repair of the earthquake-damaged piers.
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Last Update:
2022-07-01