新型自定心连梁的滞回性能及数值模拟研究  

Hysteretic properties and numerical simulation of new self-centering coupling beams

作　　者：苏佶智 佟振禹 李勇 于海丰[2,3] 张浩轩 潘钻峰 SU Jizhi;TONG Zhenyu;LI Yong;YU Haifeng;ZHANG Haoxuan;PAN Zuanfeng(Hebei Economic Research Institute of State Grid,Shijiazhuang,Hebei 050000,China;School of Civil Engineering,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;Hebei Province Housing Construction Projects Regeneration Technology Innovation Center,Shijiazhuang,Hebei 050018,China;Hebei Construction Engineering Quality Inspection Center Company Limited,Xiong′an,Hebei 071800,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]国网河北省电力有限公司经济技术研究院,河北石家庄050000 [2]河北科技大学建筑工程学院,河北石家庄050018 [3]河北省房屋建筑工程更新技术创新中心,河北石家庄050018 [4]河北省建筑工程质量检测中心有限公司,河北雄安071800 [5]同济大学土木工程学院,上海200092

出　　处：《河北科技大学学报》2025年第2期215-224,共10页Journal of Hebei University of Science and Technology

基　　金：国家自然科学基金(52078368);中央引导地方科技发展资金项目(236Z5408G);河北省自然科学基金(E2023208069);河北省高等学校科学技术研究项目(QN2024054)。

摘　　要：针对可更换连梁中的损伤部件在强震后由于残余位移过大而无法拆卸和更换的问题,提出一种基于形状记忆合金(shape memory alloy,SMA)杆的新型自定心连梁(self-centering coupling beam,SCCB)。首先,设计并测试了一种新型自定心摩擦阻尼器,研究其力学性能;其次,对同一SCCB试件进行了低周往复加载试验,探究了加载速率对其滞回性能的影响;最后,建立SCCB的有限元模型并进行参数化分析。结果表明:SCCB的滞回特性呈典型“旗帜”型,摩擦力为10 kN时,加载速率从1 mm/min提升到10 mm/min,滞回环面积减小了34.45%;增大SMA棒直径可以提高SCCB的刚度、承载力及耗能,并减少残余位移;增大SMA棒预拉力可以提高刚度和承载力,对耗能影响较小。SCCB有效提高了结构在强震后对残余位移的适应能力,为可更换连梁的设计提供了参考。Aiming at the problem that the damaged parts in replaceable beam cannot be disassembled and replaced due to excessive residual displacement after strong earthquakes,a new self-centering coupling beams(SCCB)based on shape memory alloy(SMA)rod was proposed.Firstly,a new self-centering friction damper was designed and tested to study its mechanical properties.Secondly,the low cycle reciprocating loading test was carried out on the same SCCB specimen to explore the effect of loading rate on its hysteresis performance.Finally,a finite element model of SCCB was established and parameterized.The results show that the hysteretic properties of SCCB show a typical"flag type".When the friction force is 10 kN,the loading rate increases from 1 mm/min to 10 mm/min,and the hysteretic area decreases by 34.45%;Increasing the diameter of SMA rod can improve the stiffness,bearing capacity and energy consumption of SCCB,and reduce the residual displacement;Increasing the pretension of SMA rod can improve the stiffness and bearing capacity,which has little influence on energy consumption.SCCB can effectively improve the adaptability of structures to residual displacement after strong earthquakes,providing reference for the design of replaceable beams.

关 键 词：金属结构 自定心 连梁 形状记忆合金 抗震性能 震后可修复性 

分 类 号：TU391[建筑科学—结构工程]