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为了研究预应力自复位混凝土框架结构的抗震性能,分别进行了一榀预应力自复位预制框架中节点和现浇框架中节点的低周往复荷载试验。试验结果表明:与现浇框架中节点相比,预应力自复位预制框架中节点损伤主要集中在角钢上,梁、柱构件及预应力筋基本保持弹性;预应力自复位预制框架中节点的残余变形远远小于现浇节点,能量耗散系数约为现浇节点的一半。
In order to study the seismic behavior of prestressed self-resetting concrete frame structures, the low-cycle reciprocating load tests of joints in prefabricated self-resetting prefabricated frames and nodes in cast-in-situ frames were carried out respectively. The experimental results show that compared with the joints in the cast-in-situ frame, the joint damage in the prestressed self-resetting prefabricated frame mainly concentrates on the angle steel, and the beams, columns and prestressing tendons maintain their elasticity basically. The residuals of the nodes in the prestressed self-resetting prefabricated frame Deformation is far less than the in-situ node, the energy dissipation factor is about half of the site.