E型钢阻尼支座的设计与减震性能分析

The Design and Seismic Isolation Performance Analysis of Bearings with E- shape Metallic Dampers

研究目的:本文介绍了E型钢阻尼支座的工作原理、设计方法、应用实例,并对其进行了有限元分析和试验室测试,验证其设计及其应用的可行性。另外对E型钢阻尼支座进行了实桥减震性能分析,分析其设计地震和罕遇地震下的相对位移和桥梁内力,验证其耗能效果。研究结论:本文对于E型钢阻尼支座的设计计算方法与有限元分析和试验室测试结果基本一致,说明该设计的正确性和可行性。实桥分析结果表明:(1)E型钢阻尼支座可有效减小简支梁桥的墩顶相对位移和墩底内力,满足抗震要求;(2)其滞回曲线饱满,说明E型钢阻尼支座的型钢耗能部件已经进入塑性阶段,且发挥了良好的耗能特性;(3)E型钢阻尼支座可有效减小桥梁的地震响应,从而保护桥梁结构避免在地震中破坏;(4)E型钢阻尼支座可推广应用于采用减隔震设计的铁路桥梁中。

Research purposes： This paper introduces working principle, design method, and application examples of bearings with E - shape metallic dampers. Finite element analysis and laboratory test have been done to validate the teasibility on bridges, and analyses its relative displacement and inner force of bridge when design level earthquake and rare earthquake happen to validate its energy absorption. Research conclusions：The calculating method that this paper adopts is basically consistent with the results of finite element analysis and laboratory test, which shows validity and feasibility of design in this paper. Practical bridge test results shows that ： （ 1 ） Bearings with E - shape metallic dampers can effectively decrease the relative displacement on the top of pier and internal force on the bottom of pier, so as to meet seismic demand. （2） The hysteresis loop is full, which shows that bearings with E - shape metallic dampershave entered the plastic stage and played a good characteristic of energy dissipation. （3）Bearings with E -shape metallic dampers can effectively reduce seismic response of bridges, so as to protect bridges from structure damage in earthquake. （4）Bearings with E -shape metallic damperscan be used on railway bridges which adopt seismic isolation design.