钢板双面外包混凝土组合剪力墙栓钉拉力及弯矩需求

Tension force and bending moment demands on headed studs in C-SPW with concrete panels on both sides of steel plates

钢板外包混凝土组合剪力墙(C-SPW)是在钢墙板外侧浇筑钢筋混凝土板,通过抗剪栓钉将钢墙板与混凝土板形成整体共同受力的新型抗侧力构件。采用ABAQUS建立了钢板双面外包混凝土C-SPW有限元模型,设计了28个有限元算例,对其施加单调水平荷载,分析了墙板高宽比、钢板厚度、混凝土板厚度、栓钉直径、钢板屈服强度对钢板双面外包混凝土C-SPW栓钉拉力、弯矩的影响,以及较大拉力、弯矩栓钉分布规律;以墙板弹塑性层间侧移角2%前栓钉不受拉破坏或受弯破坏为准则,提出了栓钉拉力及弯矩需求计算公式。

Composite steel plate shear wall(C-SPW)consists of steel plate and reinforced concrete panel on one or both sides of the steel plate using headed studs,which is an effective lateral load resisting shear wall.In this paper,the finite element model of C-SPW with concrete encasement on both sides of the steel plate is established by ABAQUS and the responses of structural elements in 28 C-SPW specimens with different aspect ratio under monotonic lateral load are investigated.The effects of the steel plate thickness,concrete panel thickness,headed stud diameter and steel plate yield strength on the tension force and bending moment of headed studs are studied.Based on the finite element analysis results,available formulas for the demands on tension force and bending moment of headed studs in the design of C-SPW are proposed to make sure the headed studs are not destroyed until the drift ratio achieves 2.0%.