建筑结构学报2023，Vol.44Issue(12)：46-58,13.DOI:10.14006/j.jzjgxb.2022.0658
装配式冷弯薄壁型钢-轻质混凝土组合剪力墙抗震性能研究
Study on seismic behavior of assembled lightweight concrete-filled cold-formed thin-walled steel composite shear walls
摘要
Abstract
lo enhance the seismic performance of cold-formed thin-walled steel(CIS)composite wall filled with foam concrete,a novel type of lightweight concrete-filled CTS shear wall is proposed in this paper.The wall comprises rectangular CTS end studs filled with self-compacting lightweight concrete(SLC),high-strength foam concrete-filled CTS inner walls,and double-layer wall panels.Four full-scale specimens of lightweight concrete-filled CTS shear wall were subjected to reversed cyclic load.The influences of reinforced end stud,double interior stud and stud web openings on the seismic behavior such as failure mode,bearing capacity,lateral stiffness,deformation,ductility,stiffness and bearing capacity degradation,energy dissipation capacity,were investigated.The experimental results reveal that the specimens exhibit the shear failure characteristics,with oblique cracks observed in the wallboards and foam concrete.The lateral deformation during the elasto-plastic stage shows shear deformation,with the displacement angle ranging from 1/62 to 1/45 at peak load.Moreover,the adaptation of rectangular end stud and interior stud filled with SLC effectively prevents the local buckling failure,and significantly improves the shear bearing capacity and lateral stiffness of the walls.Additionally,increasing the number of openings in the stud webs prevents bond slip between studs and concrete core,leading to a noticeable enhancement in shear strength,lateral stiffness and energy dissipation capacity of the walls.It also delays the degradation of strength and stiffness.Based on the bearing capacity superposition principle,a shear bearing capacity calculation formula for this type shear wall was proposed,and the calculation results demonstrated good agreement with the test results.关键词
冷弯薄壁型钢剪力墙/轻质混凝土/拟静力试验/抗震性能/受剪承载力Key words
cold-formed thin-walled steel shear wall/lightweight concrete/quasi-static test/seismic behavior/shear bearing capacity分类
建筑与水利引用本文复制引用
徐志峰,陈海涛,王来,陈忠范,周世栋..装配式冷弯薄壁型钢-轻质混凝土组合剪力墙抗震性能研究[J].建筑结构学报,2023,44(12):46-58,13.基金项目
国家自然科学基金项目(51908341),国家自然科学基金面上项目(52078120),山东省高等学校青创人才引育计划项目(海洋土木工程材料与结构创新研究团队). （51908341）
