页岩陶粒混凝土剪力墙抗震性能试验研究

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。

Experimental study on seismic behavior of shale ceramsite concrete shear walls

With quasi-static tests,the seismic performance of five kinds of shale ceramsite concrete shear walls were studied.The effects of height-width ratios and reinforcement ratios of shear walls were considered.The failure pattern,hysteretic loops,bearing capacities,ductility,energy dissipation,stiffness of shale ceramsite concrete shear walls were analyzed.Analytical result indicates that the shale ceramsite concrete shear walls have good ductility and mechanical properties.The height-width ratio is the major factor affecting the failure mode of shale ceramsite concrete shear walls.The failure mode of shale ceramsite concrete shear walls is similar to common concrete shear wall and other light weight aggregate concrete shear wall.The failed regions of shale ceramsite concrete shear walls mainly concentrate within the width of the shear walls on the bottom above.To increase the vertical reinforcement ratio will help improving the deformation properties and the bearing capacity of shale ceramsite concrete shear walls.To increase the transverse reinforcement ratio can not proportionally improve the bearing capacity of shear walls.Based on the analogous truss model calculation theory and the dowel actions of vertical reinforcement for shear wall,the calculation formula of the bearing capacity for shale ceramsite concrete shear walls was established and the calculate results were compared with test results.