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通过5个不同高宽比、不同腹板配筋率的页岩陶粒混凝土剪力墙试件的低周反复荷载试验,研究页岩陶粒混凝土剪力墙的抗震性能及受力机理,分析页岩陶粒混凝土剪力墙破坏形态、滞回曲线、承载力、延性、耗能、刚度等。研究结果表明:页岩陶粒混凝土剪力墙具有较好的延性和受力性能;影响墙体破坏形态的主要因素是高宽比,其破坏形态与普通混凝土剪力墙及其它轻骨料混凝土剪力墙基本相似,破坏区域主要集中在距墙底墙肢宽度范围内;增大竖向配筋率有利于改善墙体的变形性能及提高墙体的承载能力;增加横向钢筋配筋率,墙体承载力并非呈比例增加。基于比拟桁架模型理论,考虑竖向分布钢筋的销栓作用,建立了页岩陶粒混凝土剪力墙斜截面承载力计算式,计算结果与试验结果吻合较好。
Through the low-cycle repeated loading tests of shale ceramisite concrete shear wall specimens with five different aspect ratios and different web reinforcement ratios, the seismic behavior and mechanics of shale ceramsite concrete shear wall were studied. Shale ceramsite concrete shear wall failure morphology, hysteresis curve, bearing capacity, ductility, energy consumption, stiffness and so on. The results show that the shale ceramisite concrete shear wall has good ductility and mechanical properties. The main factor that affects the failure mode of the wall is the aspect ratio. The failure mode of the shale ceramsite concrete shear wall is similar to ordinary concrete shear walls and other lightweight aggregate concrete The shear walls are basically similar, and the damage areas are mainly concentrated within the width of the wall from the bottom wall; increasing the vertical reinforcement ratio is conducive to improving the deformation performance of the wall and improve the bearing capacity of the wall; increasing the reinforcement ratio of transverse reinforcement, Wall capacity does not increase proportionally. Based on the truss truss theory and the pin function of vertical reinforcement, the calculation formula of bearing capacity of shale ceramisite concrete shear wall is established, and the calculated result agrees well with the experimental results.