钢管混凝土边柱-横肋波纹钢板异形剪力墙抗震性能试验研究

Seismic tests of specially-shaped shear walls with concrete-filled steel tubular columns and horizontally corrugated steel plates

为研究适用于中高层钢结构住宅中的钢管混凝土边柱-横肋波纹钢板异形剪力墙的抗侧力性能,针对C形剪力墙及增设竖向加劲梁和内置钢管混凝土柱构造的两种改进C形剪力墙开展了基于层间位移角控制的拟静力试验研究,考察了三种构造下剪力墙的承载力和失效模式、变形能力、刚度及耗能能力。研究表明:钢管混凝土边柱-横肋波纹钢板异形剪力墙有效实现了竖向荷载由钢管混凝土柱承担、水平抗剪由波纹钢板承担的分离式承载;波纹钢板在宽厚比较大时仍然会产生面外失稳,并造成受剪承载力的突降;设置加劲梁和内插方钢管混凝土隔断柱的复合墙体构造均能有效约束波纹钢板的失稳行为,使得波纹钢板实现剪切板域的剪切屈服并得到饱满的滞回曲线;两种改进构造下横肋波纹钢板异形剪力墙表现出良好的延性和耗能能力。

This paper presents a study on the lateral load resisting behavior of a specially-shaped shear wall system, which consists of concrete-filled steel tubular columns and horizontally corrugated steel plates and is proposed for use in mid-rise to high-rise residential buildings. One basic C-shaped shear wall and two improved C-walls with vertical stiffening beams or internal concrete-filled steel tubular colomns were tested under drift-controlled quasi-static cyclic loads. The load bearing capacity, failure modes, deformation modes, stiffness degradation and energy dissipation behavior were investigated and discussed. The results indicate that the specially-shaped shear walls possess the separate load bearing mode: the axial loads are withstood by the concrete-filled steel tubular columns and the horizontal loads are resisted by the horizontally corrugated steel plates. The corrugated shear plates with a high slenderness still have the out-of-plane buckling failure which is accompanied with the sudden load drop. The reinforcing measures with stiffening beams and the built-up construction with internal concrete-filled steel tubular columns can effectively restrain the buckling of corrugated shear plates, ensuring the all-section shear yielding of corrugated plates and the full hysteretic loops. Two reinforced specially-shaped horizontally corrugated plate shear walls present good ductility and energy dissipation capacities.