设置SMA滑动摩擦阻尼器的自复位摇摆柱滞回行为拟静力试验研究  

Quasi-static experimental study on cyclic behavior of self-centering rocking column with SMA slip friction damper

作　　者：邱灿星 刘家旺 杜修力[1] QIU Canxing;LIU Jiawang;DU Xiuli(Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124

出　　处：《建筑结构学报》2023年第7期59-69,共11页Journal of Building Structures

基　　金：国家自然科学基金项目(51808317,52178267)。

摘　　要：为检验设置形状记忆合金(SMA)滑动摩擦阻尼器(shape memory alloy slip friction damper,SMASFD)的自复位摇摆柱的滞回性能,对其开展了拟静力试验研究。对摇摆柱的关键部件,即镍钛SMA螺栓和变摩擦斜面,分别开展了试验研究。设计并加工了缩尺比例为1∶2的摇摆柱试件并开展拟静力试验。试验结果表明:摇摆柱展现出了预期的柱底转动张开变形模式,试验结束后阻尼器和柱身均恢复至初始位置,并且各部件均未产生损伤;该自复位摇摆柱具有对称的“旗帜形”滞回曲线,力学性能稳定,自复位性能优越,并具备一定的消能能力。摇摆柱的弯矩-位移角关系的理论公式计算结果与试验结果吻合良好,可较好地预测摇摆柱在各阶段的力学特征。在ABAQUS和OpenSees中分别建立了精细化模型和高效计算模型,模型分析结果与试验结果吻合较好。This paper presented the quasi-static experimental study to examine the cyclic behavior of the self-centering(SC)rocking column with the shape memory alloy slip friction damper(SMASFD).The behavior of the key parts of the rocking column,namely,NiTi SMA bolt and variable friction surface,was tested.The cyclic behavior of a 1∶2-scale specimen of the rocking column was obtained through quasi-static test.It is shown that,during the test,the rocking column exhibits anticipated deformation mode,where the column base opens and rotates.After test,there is no damage,the column and SMASFDs return to their original position.The rocking column has a stable and symmetrical flag-shaped hysteresis curve,indicating it has excellent SC capacity and satisfactory energy-dissipation capability.The analytical method can predict the moment-drift behavior of the rocking column,and the result agrees well with the experimental data.The hysteretic characteristics of therocking column at different stages can also be well captured.In addition,refined model and efficient computational model were established in ABAQUS and OpenSees to further understand the cyclic behavior of the proposed rocking column,and good agreement can be found between the numerical and experimental results.

关 键 词：摇摆柱 形状记忆合金 自复位 拟静力试验 滞回行为 

分 类 号：TU352.1[建筑科学—结构工程] TU317.1