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锁铆连接冷弯薄壁型钢剪力墙抗震性能研究

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锁铆连接具有力学性能好、连接效率高等优势,将其应用于冷弯薄壁型钢剪力墙,以改善该类剪力墙刚度差、承载力弱和工业化程度低等问题.通过对3个锁铆连接冷弯薄壁型钢剪力墙和1个螺钉连接冷弯薄壁型钢剪力墙进行低周往复加载试验,得到墙体的破坏模式、延性、耗能能力、承载力和刚度退化情况,研究铆钉间距(50～150 mm)对剪力墙抗震性能的影响;根据剪力墙的损伤状态和性能化设计目标,建议其弹性和弹塑性层间位移角限值;基于OpenSees有限元软件,提出锁铆连接剪力墙的非线性简化分析模型及整体结构的高效抗震性能分析方法;在此基础上,对整体结构进行增量动力时程分析,评估锁铆连接冷弯薄壁型钢结构的抗震性能.研究结果表明:锁铆连接冷弯薄壁型钢剪力墙的主要破坏模式包括钢板屈曲、锁铆连接失效、边立柱畸变屈曲和导轨撕裂;钢板边缘铆钉间距对其抗震性能有较大影响;减小铆钉间距可有效提高剪力墙的承载力、刚度、延性、变形和能量耗散能力,且可改善其刚度突变现象;采用1/300作为锁铆连接剪力墙弹性层间位移角限值、1/50作为弹塑性层间位移角限值安全可行;非线性简化分析模型可较精确地模拟剪力墙的滞回性能;锁铆连接冷弯薄壁型钢结构的抗震性能满足规范要求.
Seismic performance of self-piercing riveted cold-formed thin-walled steel shear wall
Self-piercing riveting(SPR)connections have superior mechanical properties and high connection efficiency,they are thus used in cold-formed thin-walled steel(CFTWS)shear wall to improve the stiffness,bearing capacity and low degree of industrialization of the wall.In this study,low-cycle reciprocating load tests were conducted for the three CFTWS shear walls with SPR and one CFTWS shear wall with screw connection.The failure mode,ductility,energy dissipation capacity,shear capacity and stiffness degradation of each specimen were obtained,and the effect of rivet spacing(50-150 mm)on the seismic performance of shear walls was studied.According to the damaged states of the shear wall and the performance design objectives,the limit values of the elastic and elastic-plastic story-drift angle were proposed.Based on the OpenSees finite element software,a nonlinear simplified analysis model of CFTWS shear wall with SPR and an efficient seismic performance analysis method of the whole structure were proposed.In addition,the incremental dynamic analysis of the entire structure was conducted based on the simplified model,and the seismic performance of CFTWS structures with SPR connections were evaluated.The results show that the main failure modes of the CFTWS shear walls with SPR include sheet buckling,failure of SPR,distortional buckling of end stud and track tearing,and the rivet spacing at the edge of the sheet is the key factor.Reducing the rivet spacing can effectively improve the shear capacity,stiffness,ductility,deformation and energy dissipation capacity of shear wall,and improve the sudden change of stiffness.Based on the results in this study,the limit value of the elastic and elastic-plastic story-drift angle can be suggested as 1/300 and 1/50,respectively.The nonlinear simplified analysis model can accurately predict the hysteretic properties of shear wall.The seismic performance of CFTWS structures with SPR connections meets the requirements of the code.

cold-formed thin-walled steel shear wallself-piercing rivetingquasi-static testFEAseismic performancecollapse resistance capacity

谢志强、樊颖、张爱林、周大兴、耿德宇、张向东、毕烨、董磊

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北京建筑大学土木与交通工程学院,北京10004

北京建筑大学北京节能减排与城乡可持续发展省部共建协同创新中心,北京 100044

中铁建设集团有限公司,北京 100040

民航专业工程质量监督总站,北京 100102

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冷弯薄壁型钢剪力墙 锁铆连接 拟静力试验 有限元分析 抗震性能 抗倒塌能力

国家自然科学基金项目北京市教育委员会科学研究计划资助项目北京建筑大学金字塔人才培养工程项目北京建筑大学科研培育项目-青椒计划

52008018KM202110016012JDYC20220804X23046

2024

10.14006/j.jzjgxb.2023.0338

建筑结构学报
中国建筑学会

建筑结构学报

CSTPCD北大核心
影响因子：1.546
ISSN：1000-6869
年,卷(期)：2024.45(11)