自复位结构在土木工程的应用

Application of self-centering structures in civil engineering

自复位结构体系在人们对结构抗震性能要求日益提高和基于性能抗震设计理念的背景下获得了大量关注。自复位结构体系具有以下优点:1)减小或避免主体结构损伤;2)耗散地震能量和减小地震作用;3)最小化结构残余变形;4)减少震后修复费用及其间接经济损失。本文主要介绍了三方面的容:自复位介绍、形状记忆合金(SMA)及其应用、PT装置及其抗震性能、摇摆机制简介。

In the context of the increasing requires of structural seismic resisting and the concept of performance-based seismic design, self-centering systems have been gained lots of attention. Self-centering systems have following advantages: 1) reducing or eliminating the damage of main structure; 2) dissipating seismic energy and depressing the structural response; 3) minimizing the residual structural deformation; 4) Decreasing the cost for repair after earthquake and the indirect economic losses. Mainly four aspects were included: 1) introduction of self-centering concept; 2)application of shape memory alloy( SMA); 3) the seismic performance of post-tensioned( PT) devices; 4) brief introduction of rocking mechanism.