梁桥多级设防SMA减震装置

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (24) : 209-217.

论文

梁桥多级设防SMA减震装置

曹飒飒1，伍隋文2，孙卓1，王欢1，杨俊1

作者信息 +

A multi-level performance SMA-based isolation system in girder bridges

CAO Sasa1,WU Suiwen2,SUN Zhuo1,WANG Huan1,YANG Jun1

Author information +

文章历史 +

摘要

近场地震动输入下，减隔震桥梁会发生比较大的位移和残余变形，导致落梁等严重震害。拟提出一种新型多级设防SMA减震装置，由三级SMA索与铅芯橡胶支座并联组成；随地震强度增大，各级SMA索依次张紧，满足不同性能需求；基于OpenSees和Sap2000软件，探索多级设防SMA减震装置恢复力模型和滞回模型，对比分析两种软件对多级设防SMA减震装置的模拟效果。以某一连续梁桥为例，以SMA索截面积进行参数分析，研究其多级减震效果。结果表明，该装置具有较好的自复位、限位和耗能能力，兼具多级设防的优点。

Abstract

During the near-fault earthquake action, isolated bridges experience significant in-plane displacement and residual displacements, which may cause the bridge girders to unseating and even complete collapse.In this paper, a multi-level performance SMA-based isolation system was proposed.This device consists of 3-levels of SMA cables and conventional isolators, which are assembled in parallel.With the intensity of earthquake increasing, each level of SMA cables will be activated in a sequence to meet different performance requirements.Based on OpenSees and Sap2000 platforms, the lateral restoring force-displacement relationship and the hysteresis model of a specific SMA-based isolator was explored.The effectiveness of the two platforms for simulating the isolator was also investigated.Furthermore, a case study of a continuous bridge was conducted and parameter analysis about effective sectional area was conducted to testify the effectiveness of the isolation system in multi-level aseismic design.It turns out that this device has better displacement reduction, restoration, and energy dissipation capability.In addition, it has the advantages of multi-level performances, which ensures itself a bright prospect in application.

导出引用

曹飒飒1，伍隋文2，孙卓1，王欢1，杨俊1. 梁桥多级设防SMA减震装置[J]. 振动与冲击, 2019, 38(24): 209-217

CAO Sasa1,WU Suiwen2,SUN Zhuo1,WANG Huan1,YANG Jun1. A multi-level performance SMA-based isolation system in girder bridges[J]. Journal of Vibration and Shock, 2019, 38(24): 209-217

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