Affiliation:
1. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
2. College of Civil Engineering, Tongji University, Shanghai 200092, China
Abstract
In order to improve the post-earthquake resilience of bridge structures, a Two-Stage seismic isolation method is proposed in this paper. According to the method, the restoring force and horizontal stiffness are smaller in the first stage and become much larger in the second stage. Therefore, a new kind of seismic isolation device, Two-Stage Friction Pendulum Bearing (TSFPB for short), is invented based on the traditional friction pendulum bearing (FPB for short). In this paper, the geometry configuration, sliding states and hysteresis characteristics of the bearing are first introduced with a theoretical approach. Then the hysteresis curve of the TSFPB is verified experimentally and the simulation method of the bearing in an FEM software is proposed. Last, a numerical analysis for an actual highway girder bridge is carried out to compare the seismic design method recommended in this paper with the conventional seismic isolation method. It is found that the Two-Stage seismic isolation method has an adaptive restoring force, horizontal stiffness and energy dissipation mechanism for different seismic intensity levels and better seismic performance compared with a conventional seismic isolation method. In addition, bridges with TSFPBs have smaller residual displacements and better post-earthquake resilience than those with traditional FPBs.
Funder
the Ministry of Science and Technology of China
the National Natural Science Foundation of China
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
Reference41 articles.
1. Zayas, V.A., Low, S.S., and Mahin, S.A. (1987). FPS (Friction Pendulum System) Earthquake Resisting System. Experimental Report, California Univ., Richmond. Earthquake Engineering Research Center, Earthquake Protection Systems.
2. Historical Development of Friction-Based Seismic Isolation Systems;Calvi;Soil Dyn. Earthq. Eng.,2018
3. Comparison of Different Models for Friction Pendulum Isolators in Structures Subjected to Horizontal and Vertical Ground Motions;Landi;Soil Dyn. Earthq. Eng.,2016
4. The Sliding Isolation Pendulum—An Improved Recentring Bridge Bearing;Braun;Steel Constr.,2009
5. Seismic Performance Assessment of a Single-Layer Spherical Lattice Shell Structure with Multifunctional Friction Pendulum Bearings;Zhuang;Int. J. Struct. Stab. Dyn.,2022
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献