基于形状记忆合金橡胶碰撞缓冲器的相邻单自由度结构地震碰撞减震分析  

SEISMIC IMPACT DAMPING MECHANISMS OF SHAPE MEMORY ALLOY PSEUDO-RUBBER ABSORBERS ON ADJACENT SDOF STRUCTURES

作　　者：张璞[1] 李素超[1,2] 方庆贺 王辰宇 王志远[1] ZHANG Pu;LI Suchao;FANG Qinghe;WANG Chenyu;WANG Zhiyuan(Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology,Harbin 150090,China;Department of Civil Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China)

机构地区：[1]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,哈尔滨150090 [2]哈尔滨工业大学(威海)土木工程系,山东威海264209

出　　处：《工业建筑》2021年第11期13-18,共6页Industrial Construction

基　　金：国家重点研发计划项目资助(2018YFC0809400);山东省自然科学基金面上项目资助(ZR2020ME247)。

摘　　要：相邻结构在强震作用下的碰撞会引起加速度放大、应力损伤甚至破坏。基于形状记忆合金橡胶的非线性应变硬化和摩擦耗能特性,对比研究相邻单自由度结构体系在安装/未安装形状记忆合金橡胶垫情况下的地震碰撞过程,分析形状记忆合金橡胶垫轴向刚度对结构碰撞减震指标的影响规律。研究表明:形状记忆合金橡胶碰撞缓冲器具有高弹性、高阻尼和非线性硬化的特性,能够延长碰撞作用时间,有效降低结构碰撞响应,降低幅度在90%以上;轴向刚度是其碰撞减震控制效果的敏感参数,减震控制效果随轴向刚度降低而增加。Impact of adjacent structures may cause acceleration amplification, stress damage even collapse during strong ground motions. Based on the characteristics of nonlinear strain hardening and friction energy dissipation in shape memory alloy pseudo-rubber(SMAPR), the seismic impact processes in adjacent single-degree-freedom(SDOF) structures with/without SMAPR absorber were compared, and parametric analysis was conducted to study the effects of axial stiffness of SMAPR on structure impact pounding response. The results showed that SMAPR was characterized by high elasticity, high damping and nonlinear strain hardening, which could prolong the impact time, and effectively reduce the impact response over 90%. Axial stiffness was the sensitive parameter to affect the control response, and the response of shock absorption increased with the decrease of axial stiffness.

关 键 词：形状记忆合金橡胶 非线性应力硬化 地震碰撞 单自由度结构 碰撞缓冲 

分 类 号：TU352.1[建筑科学—结构工程]