SRHSHPC框架结构地震损伤试验研究

EXPERIMENTAL STUDY ON SEISMIC DAMAGE OF SRHSHPC FRAMED STRUCTURE

基于一榀型钢高强高性能混凝土(SRHSHPC)框架结构试件拟静力试验,观测了SRHSHPC框架结构在低周反复荷载作用下的裂缝开展和破坏模式,得到了框架结构的荷载位移曲线和骨架曲线,通过对试验现象的分析,揭示了SRHSHPC框架结构中梁、柱构件损伤与结构单层破坏之间的关系,引入节点位置权重系数,建立了结构单层地震损伤模型;通过对结构单层损伤与整体结构破坏之间的关系进行分析,建立了SRHSHPC框架结构地震损伤模型。计算结果与试验结果的对比表明:该文所建立的地震损伤模型能够较好地描述SRHSHPC框架结构的地震损伤演化过程与损伤程度,并反映构件损伤、局部结构损伤以及整体结构损伤三者之间迁移演化规律。

Based on the test of a SRHSHPC framed structure under a low cycle reversed loading, the crack propagation and failure mode were observed in this test. According to the tested load-displacement hysteretic curve and skeleton curve of the frame, the relation between component damage and storey damage was analyzed. The storey damage model was established by introducing a joint location weighting coefficient; through analyzing the relation between storey damage and structure damage, the structure damage model of the SRHSHPC frame was established. The comparison of the calculated results with test results indicates that the proposed seismic damage model can appropriately describe the damage degree and evolution process of the SRHSHPC framed structure, and the migration evolution law between local component damage, local structure damage and global structure damage is revealed.