压型钢板-竹胶板组合墙体抗震性能试验研究

EXPERIMENTAL STUDY ON ASEISMIC BEHAVIOR OF PROFILED STEEL SHEET-BAMBOO PLYWOOD COMPOSITE WALLS

提出了一种新型的轻质组合墙体结构——以压型钢板为骨架芯板,钢板两面用结构胶粘剂粘贴竹帘胶合板,两侧用厚竹板封边并用自攻螺钉固定的压型钢板-竹胶板组合墙体。以竹胶板厚度、钢板厚度、压型钢板波高等为参数,对5片组合墙体进行拟静力试验,观察各级荷载作用下竹板和钢板中的应变变化,得到了组合墙体的承载力指标以及延性系数、耗能系数等抗震性能指标,在此基础上进行了组合墙体的承载力分析。结果表明,竹板厚度对墙体的水平抗剪强度和刚度的影响不大,而芯部压型钢板的厚度和波高的变化对墙体承载力指标和抗震性能指标影响显著;根据弹性阶段组合墙体呈现的应力-应变关系,提出了组合墙体的力学简化模型及承载力计算方法,其计算值与试验值吻合较好。

The paper presents a new type of lightweight composite wall composed by gluing two pieces of bamboo plywood on the surface and a piece of profiled steel sheet in the core,closed the both sides of wall by two pieces of thick bamboo plywood and fixed them with self-tapping screws.Pseudo-static tests on a total of 5 composite walls,observed the change of strain in the steel sheets and bamboo plates at all level loads,acquired the bearing capacity,ductility,dissipative coefficient,and other indictors about aseismic performance,which took thickness of the bamboo plywood,thickness and wave-height of the steel sheet into account factors.The result shows that changes of thickness of bamboo plywood have little effect on the shear strength and stiffness of composite walls,but changes of thickness and wave-height of a profiled steel sheet make very sharp differences to bearing capability and aseismic performances of these walls.Based on the stress-strain curve within elastic range of composite walls,this paper proposes a simplified mechanical model and a calculation method for bearing capacity,and the calculated values of bearing capacity match well with the experimental ones.