装配式自复位钢框架-开缝钢板剪力墙结构试验研究

EXPERIMENTAL STUDY ON PREFABRICATED SELFCENTERINGSTEEL FRAMES WITH SLIT STEEL PLATE SHEAR WALLS

提出了一种新型带有开缝钢板剪力墙的装配式自复位钢框架结构,设计并完成该结构在低周往复荷载作用下的拟静力试验,研究其刚度、耗能性能、破坏模式以及复位能力。结果表明:该结构具有良好的开口闭合机制,震后自复位并通过更换钢板墙快速恢复主体结构功能。结构初始刚度高,耗能能力优。在水平荷载作用下,钢板剪力墙进入屈曲耗能,有效地保护框架主体结构。在达到规范规定弹塑性层间位移角限值1/50时试验结束,自复位钢框架基本处于弹性状态,残余开口较小,且试验过程中最大索力远小于屈服索力,为该结构能够承受更大的地震作用提供良好基础。

It proposed a new prefabricated self-centering steel frame with slit steel plate shear walls.A low-cycle reciprocated static loading test of the new structure was designed and conducted to study the stiffness,energy dissipation performance,failure mode and self-centering capacity.The results show that the prefabricated selfcentering steel frame had favorable gap opening and closing mechanism and could automatically re-center after the earthquake.The function of the main structure could be efficiently restored by replacing the slit steel plate shear walls.The structure possessed high initial stiffness and good energy dissipation capacity.Under horizontal loads,the slit steel plate shear wall was able to dissipate energy through the development of buckling and thus effectively protected the prefabricated self-centering steel frame.At the elastoplastic interstory drift limit of 0.02 rad(1/50)stipulated in the code,the prefabricated self-centering steel frame was essentially in the elastic state with small residual opening.During the test,the maximum cable force was far less than the yield force,which provided a good foundation for the structure to withstand a greater earthquake action.