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通过6个剪跨比分别为2.1、1.5和1.0的型钢高性能混凝土剪力墙的低周反复水平加载试验,研究了这种构件在压、弯、剪共同作用下的破坏过程和破坏机理;分析了剪跨比、轴压比、水平分布钢筋数量等因素对剪力墙的破坏形态、延性、滞回特性、承载力衰减等的影响。试验表明,在压、弯、剪共同作用下,型钢高性能混凝土剪力墙的破坏形态与其剪跨比、轴压比、型钢与水平分布钢筋的相对数量等因素有关,其中,剪跨比和轴压比是影响型钢高性能混凝土剪力墙延性的主要因素,在剪跨比相同时,水平分布钢筋数量相对较多,剪力墙的延性相对较好。
The failure process and failure mechanism of such members under the combined action of pressure, bending and shearing were studied through six low-cycle repeated horizontal loading tests of six high-performance concretes with shear-span ratio of 2.1, 1.5 and 1.0 respectively. The effects of shear span ratio, axial compression ratio, horizontal distribution of rebars and other factors on failure mode, ductility, hysteretic behavior and bearing capacity decay of the shear wall are analyzed. The tests show that under the combined action of pressure, bending and shearing, the failure mode of the high performance concrete shear wall is related to the shear span ratio, axial compression ratio, the relative number of steel bars and horizontal distribution rebar, among which the shear span ratio The axial compression ratio is the main factor that affects the ductility of the high performance concrete shear walls. When the shear span ratio is the same, the number of horizontally distributed rebars is relatively large, and the ductility of the shear wall is relatively good.