基于低摩擦和SMA的新型自复位支撑力学性能与设计方法  

Mechanical properties and design method of an innovative re-centering brace with low friction and SMA

作　　者：顾琦 宋固全[1] 胡淑军[1,2] 郭琪 姜俊 GU Qi;SONG Guquan;HU Shujun;GUO Qi;JIANG Jun(School of Civil Engineering and Architecture,Nanchang University,Nanchang 330031,China;Jiangxi Provincial Engineering Laboratory of Nearly Zero Energy Building,Nanchang 330031,China;Hongdu Construction Group CO.,LTD.,Nanchang330229,China)

机构地区：[1]南昌大学建筑工程学院,江西南昌330031 [2]江西省近零能耗建筑工程实验室,江西南昌330031 [3]洪都建设集团有限公司,江西南昌330299

出　　处：《南昌大学学报（工科版）》2019年第3期265-270,303,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(51768044;51908268);江西省自然科学基金资助项目(20181BAB206042)

摘　　要：结合形状记忆合金、扩孔型螺栓连接和低摩擦原理,提出一种强耗能、自复位、低残余变形的新型自复位支撑。采用校正的有限元方法对合理设计的新型自复位支撑模型进行分析,以得到其滞回曲线、应力、骨架曲线和累积耗能能力等,由此明确其力学性能。通过理论分析推导新型自复位支撑的力学模型和设计方法,且与有限元分析结果对比,验证力学模型的正确性。研究表明:新型自复位支撑呈现出饱满的滞回曲线,且残余变形较小,具有良好的自复位能力。An innovative recentering brace with low friction and SMA was developed to satisfy the higher seismic demand,which based on shape memory alloy (SMA),slotted bolted connection and low friction.The mechanical property of the innovative re-centering brace will be revealed using the verified finite element (FE) method,so the mechanical property and hysteresis curve of new re-centering brace,the re-centering system stress,skeleton curve and cumulative energy dissipation capacity of the innovative brace can be obtained.The mechanical model and optimum design method of new re- centering brace can be derived using theoretical analysis,and the proposed design method will be validated by comparing with the FE results.The results showed that the innovative re-centering brace can have full hysteresis curve and low residual deformation under cyclic loading,which have a good performance of re-centering.

关 键 词：自复位支撑 形状记忆合金 低摩擦 长圆孔 力学性能 

分 类 号：TU319[建筑科学—结构工程]