内藏钢桁架深连梁联肢剪力墙抗震性能试验研究

Experimental study on seismic behavior of a coupled shear wall with deep coupling beam and concealed steel trusses

进行了1个1/7缩尺、剪跨比为2.0的带矩形钢管混凝土叠合柱边框内藏钢桁架深连梁联肢剪力墙模型的低周反复荷载试验。分析了该剪力墙的承载力、延性、滞回特性、耗能能力等抗震性能,研究了内藏钢桁架对该联肢剪力墙抗震性能的影响。试验研究表明:内藏钢桁架深连梁联肢剪力墙具有较好的延性;内藏钢桁架混凝土连梁对提高剪力墙的承载力及延性作用显著;带钢管混凝土叠合柱的翼墙可充分发挥钢管混凝土叠合柱抗压能力强、承载力高、不易开裂、延性好的优势;该新型组合剪力墙实现了"强墙肢、弱连梁"的延性屈服机制。

One 1/7 scale specimen of coupled shear wall with deep coupling beam,steel tube-reinforced concrete columns and concealed steel trusses was tested under low-frequency cyclic loading,in which its shear span ration is 2.0.The load-carrying capacity,ductility,hysteretic property,energy dissipation and the effect of the concealed steel trusses on the seismic behavior are analyzed.The results show that the kind of coupled shear wall has better ductility,and the ductility and load-bearing capacity of the coupled shear wall can be improved greatly by setting the concealed steel trusses in the deep coupling beam.The wing walls with steel tube-reinforced concrete columns bring out the advantages of higher compression capability,higher load-carrying capacity,and better ductility.This composite shear wall has the better ductility yielding mechanism.