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本文根据石家庄市 KQ-79型轻板框架板-柱节点抗震性能的试验结果,对节点的 P-△曲线(荷载-位移曲线)进行了详细的分析。对节点在反复加荷下的刚度进行了研究,提出了刚度退化的经验公式。利用该公式和一些假定,对节点延性的计算方法进行了探讨。利用整体结构破坏试验中的顶点荷载-位移曲线,比较了单节点试件和结构的延性,表明该节点用于抗震的轻板框架结构可以保证结构具有足够的延性。
In this paper, the P-△ curve (load-displacement curve) of the node is analyzed in detail based on the test results of seismic performance of the KQ-79 light-weight frame plate-column joint in Shijiazhuang City. The stiffness of the joints under repeated loading was studied and an empirical formula for stiffness degradation was proposed. Using this formula and some assumptions, the calculation method of node ductility is discussed. The ductile load-displacement curves of the monolithic structure failure test were used to compare the ductility of the single-joint specimens and structures, which showed that the joints used for the seismic light-weight frame structure can ensure the structure has sufficient ductility.