|Table of Contents|

Seismic Response Analysis of Bridge Structures with Precast Segmental Bridge Piers Based on Different Isolation Systems(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年04期
Page:
97-107
Research Field:
Publishing date:

Info

Title:
Seismic Response Analysis of Bridge Structures with Precast Segmental Bridge Piers Based on Different Isolation Systems
Author(s):
ZHAO Jian-feng;  MENG Qing-yi;  XUE Zhen-xing;  LIU Xue-fei
(School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China)
Keywords:
seismic resistance of bridge;  precast segmental bridge pier;  bridge structure;  isolation system;  dynamic time history analysis
PACS:
TU352.1
DOI:
10.19815/j.jace.2019.09054
Abstract:
In order to study the seismic responses of bridge structures with precast segmental bridge piers, based on OpenSEES finite element analysis software, the analysis models of continuous beam bridge with precast segmental bridge piers with top isolation and bottom isolation were established. The isolation effect of the isolated systems was evaluated by analyzing the dynamic characteristics, displacement, internal force, residual displacement, prestress of prestressed bar and joint pressure of the bridge model under three groups of ground motions with different intensities and characteristics. At the same time, suggestions for the design of pier bottom isolation bridges were put forward. The results show that both pier top isolation system and pier bottom isolation system can greatly reduce the displacement and internal force of the bridge in earthquake and prolong the natural vibration period of the bridge. The bridge structure with pier-beam consolidation and pier base isolation has longer natural vibration period, smaller epicenter displacement and residual displacement of pier top, which shows more superior isolation effect, the isolation advantage of pier base isolation system is more obvious in large earthquake. However, the precast segmental bridge pier in the bridge with base isolation system will have greater prestressed force change, prestressed force loss and joint vertical compressive force, and the isolation bearing should also have higher performance.

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Last Update: 2020-07-29