型钢预制管混凝土柱抗震性能试验

发布时间：2018-07-16 20:44

【摘要】：为了解新型预制管混凝土柱抗震性能,制作了5根预制管混凝土柱,其主要参数是核心区配置的钢筋笼或型钢.研究其在低周往复荷载作用下的破坏过程、滞回曲线、骨架曲线、承载力、变形、延性及耗能等力学性能.研究结果表明:无论核心区是否配置钢筋笼或型钢,预制管混凝土的滞回曲线都很饱满,表明其耗能能力较强.核心区配置钢筋笼或型钢预制管混凝土柱的承载力和延性明显得到提高,平均极限承载力提高约25%,平均延性系数提高约20%.但核心区配置钢筋笼或型钢对预制管混凝土柱的抗裂承载力影响不大.同时研究表明,预制管混凝土柱的破坏后期耗能不仅与每级位移下的耗能,即单位位移等效黏滞阻尼系数有关,更取决于后期破坏时的循环次数.核心区配置钢筋笼或型钢使预制管混凝土柱后期耗能次数明显增多,表明具有更强的耗能能力.
[Abstract]:In order to understand the aseismic performance of new precast tubular concrete columns, five prefabricated concrete columns are made, the main parameters of which are reinforced cage or section steel in the core area. The failure process, hysteretic curve, skeleton curve, bearing capacity, deformation, ductility and energy dissipation were studied. The results show that the hysteretic curves of precast pipe concrete are full, regardless of whether the core area is equipped with steel cage or section steel, which indicates that its energy dissipation ability is strong. The bearing capacity and ductility of reinforced cage or precast steel pipe concrete columns in the core area are obviously improved, the average ultimate bearing capacity is increased by about 25 percent, and the average ductility coefficient is increased by about 20 percent. But the reinforcement cage or section steel in the core area has little effect on the crack bearing capacity of the precast tubular concrete column. At the same time, it is shown that the energy dissipation of precast tubular concrete columns is not only related to the energy dissipation at each stage of displacement, that is, the equivalent viscous damping coefficient of unit displacement, but also depends on the number of cycles at the later stage of failure. The energy dissipation times of precast tubular concrete columns are obviously increased by the reinforcement cage or section steel in the core area, which indicates that the prefabricated concrete columns have stronger energy dissipation capacity.
【作者单位】：天津大学建筑工程学院;滨海土木工程结构与安全教育部重点实验室(天津大学);河北工业大学土木工程学院;
【基金】：国家自然科学基金资助项目(51379142) 河北省教育厅青年基金资助项目(QN20131177) 河北省科技厅基金资助项目(15275802)~~
【分类号】：TU352.11;TU398.9

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