钢筋混凝土错列剪力墙结构抗震性能的试验研究(Ⅰ)

Experimental study on the seismic behavior of reinforced concrete staggered shear wall structures(Ⅰ)

一系列与楼层等高和开间等宽的墙板沿框架高度隔层错跨布置形成的错列剪力墙结构,是一种新型的复杂抗侧力结构。为了研究钢筋混凝土错列剪力墙结构的承载力与变形能力、延性等抗震性能指标及其变形和破坏机制,进行了3榀错列剪力墙结构模型和1榀传统的框架—剪力墙结构模型的对比试验。分析了侧向荷载下错列剪力墙结构的工作机理,对错列剪力墙结构试件的受力全过程、试件破坏时各层墙板的裂缝分布规律进行了研究。试验结果表明:错列剪力墙结构的抗侧刚度和承载力要比传统框架—剪力墙结构高;由于墙板的隔层错跨布置,使错列剪力墙结构中各构件的内力发生重分布;错列剪力墙结构中墙板布置X形斜撑钢筋,延缓了墙板裂缝的发生和发展,使墙板裂缝分布更均匀。

Staggered shear walls structures composed of story-deep and bay-wide discrete staggered panels along height of frame structures is a new kind of complicated structures. In order to study on the seismic behavior of this new kind of complicated structures, including its bearing capacity, deformation capability, ductility as well as failure mechanism, the comparison of the tests of 3 the reinforced concrete staggered shear walls structure and 1 reinforced concrete frame-shear wall structure subjected to the low cyclic reversed load are carried out. Working mechanism of the staggered shear walls structure under lateral load are analysized ,the full-range analysis and wall cracking failure modes of staggered shear walls structures are studied. The results of the tests showed that lateral stiffness and hearing capacity of the staggered shear walls structure are higher than that of conventional frame shear wall structure. staggered panels make the staggered shear walls structures redistribution of internal forces, X-shaped brace in staggered panels can delay the happen and development of wall cracking, and make cracking distribution more uniform.