摘要
防屈曲钢板剪力墙通常采用混凝土盖板作为防屈曲构件,单块混凝土板存在质量大、运输与安装困难的问题,可通过对盖板分块进行解决。为此,针对设置分块盖板的防屈曲钢板剪力墙抗震性能展开研究,设计并制作2片缩尺比为1∶3的分块盖板约束的防屈曲钢板剪力墙试件,研究其在水平往复荷载作用下的滞回性能,分析盖板横向分块和十字分块对防屈曲剪力墙承载力、延性和耗能能力等滞回性能的影响;采用有限元软件ABAQUS建立设置分块盖板的防屈曲钢板剪力墙模型,通过与试验结果对比验证模型的可靠性,并通过参数分析研究盖板分块形式(横向分块、竖向分块和十字分块)和分隔缝宽度(60~720 mm)对防屈曲剪力墙力学性能的影响。研究结果表明:设置分块盖板的防屈曲钢板剪力墙具有良好的滞回性能;相比传统非加劲钢板剪力墙,设置分块盖板可以显著提高结构的承载力和耗能能力;相比盖板不分块的防屈曲钢板剪力墙,设置分块盖板的剪力墙承载力和耗能能力略有降低,但墙体的延性得到提高。当盖板分块形成的非约束区域钢板高厚比大于20时,剪力墙的承载力出现明显下降,钢板塑性应变向非约束区集中,可能导致非约束区先于约束区发生破坏。因此,建议非约束区高厚比取值不大于20。
Concrete cover plate used in buckling-restrained steel plate shear wall(BRSPSW)is difficult for transportation and installation.This problem can be solved by dividing the single cover plate into multi-plates.To study the seismic behavior of BRSPSW with partitioned restraining panels,two 1∶3 scaled BRSPSW specimens with different partition modes were designed and manufactured.The hysteretic behavior of the specimens was tested under the cyclic load.The effect of partitioned restraining panels on the bearing capacity,stiffness,ductility and energy dissipation ability was investigated.The non-linear finite element analysis(FEA)software ABAQUS was applied to develop the model and test results were used for validation.The experimental and FEA results show that BRSPSWs with partitioned restraining panels have excellent hysteretic behavior.Compared to unstiffened steel plate shear walls,BRSPSW with partitioned restraining panels have a higher bearing capacity and energy dissipated ability.The partition of restraining panels reduces the bearing capacity and energy dissipation ability of BRSPSW slightly,but improves the ductility.When the height-to-thickness ratio of unstiffened zone is large,the pure shear field of the unstiffened zone transforms into tension field,which results in the decrease of the shear bearing capacity of the shear wall.And it may also cause the premature damage of the unstiffened zone.A maximum height-to-thickness ratio of 20 is recommended for the unstiffened zone of BRSPSWs with partitioned restraining panels.
作者
钟恒
侯健
郭兰慧
ZHONG Heng;HOU Jian;GUO Lanhui(School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2021年第S02期410-418,共9页
Journal of Building Structures
基金
国家自然科学基金(51578187)
吉林省科技发展计划重点研发项目(20200403181SF)
关键词
防屈曲钢板剪力墙
分块盖板
低周往复加载试验
有限元分析
滞回性能
buckling-restrained steel plate shear wall
partitioned restraining panel
low cyclic loading test
finite element analysis
hysteretic behavior
作者简介
钟恒,男,出生于1996年,工学硕士,主要从事组合结构剪力墙方向的研究。email:zhonghenghitce@163.com;通信作者:郭兰慧,男,出生于1978年,工学博士,教授,主要从事组合结构剪力墙方向的研究。email:guolanhui@hit.edu.cn
