钢管束混凝土组合剪力墙压弯性能分析

Bending Performance Analysis of Steel Tube Bundle-Concrete Composite Shear Wall

采用水平低周往复拟静力试验方法,研究钢管束混凝土组合剪力墙受力性能。运用条带法对钢管束混凝土组合剪力墙压弯承载能力进行了数值计算分析,并建立了极限承载能力计算的简化计算公式。结果表明,条带法数值计算方法、简化计算公式的计算结果均与试验结果有较高的吻合度,可以用于实际构件的承载能力计算。在承载能力计算分析的基础上,分析了钢板厚度、钢材强度、混凝土强度等参数对组合剪力墙压弯承载能力的影响。研究表明,其他参数不变的情况下,提高混凝土强度和钢材强度均能一定程度地提高剪力墙的承载能力,且钢材强度影响较大;提高钢板厚度能够有效提高组合剪力墙的压弯承载能力和刚度。合理选择和设计组合剪力墙的参数,对改善和提高组合剪力墙的抗震性能十分重要。

The seismic behavior of steel tube bundle-concrete composite shear wall is studied by means of horizontal low-cycle reciprocating quasi-static test.The bending bearing capacity of steel tube bundle concrete composite shear wall is analyzed numerically using a strip method,and a simplified calculation formula of the ultimate bearing capacity is established accordingly.Both the strip method and the simplified calculation formula are verified by experimental results and proved to be applicable.The influences of steel plate thickness,steel strength and concrete strength are investigated on the bearing capacity of the composite shear wall.It is shown that the bearing capacity can be improved to a certain extent by higher concrete strength and higher steel strength especially.Increasing the thickness of steel plate can also effectively improve the bending bearing capacity and stiffness of the composite shear wall.It is crucial to determine and design the parameters of the composite shear wall reasonably in order to improve its seismic performance.