采用改进纵筋连接的足尺装配式钢筋混凝土柱抗震性能试验研究

发布时间：2018-06-19 14:27

本文选题：装配式混凝土结构 + 钢筋连接技术　；参考：《建筑结构学报》2017年11期

【摘要】：为满足钢筋混凝土结构建筑工业化中对拼装节点性能和装配效率的要求,研究了两种装配式拼装节点构造形式的合理性。通过5个足尺装配RC柱和2个现浇RC柱的低周往复加载试验,研究装配构造形式和轴压比对试件承载力、刚度、变形性能和滞回耗能等的影响,并提出合理的拼装节点构造和施工工艺。研究表明:在不同轴压比下,两种拼装节点的装配式RC柱总体上与现浇RC柱具有相当的抗震性能,并且部分指标略优于现浇RC柱;装配RC柱在不同位移角下的刚度、承载力退化和滞回耗能与现浇RC柱差异较小;在较大位移角(大于1/30)下,装配RC柱搭接区域纵筋在反复压屈和拉伸作用下可能发生断裂,建议采取搭接段加密箍筋的方法予以改善和避免。
[Abstract]:In order to meet the requirements for the performance and efficiency of assembly joints in the industrial construction of reinforced concrete structures, the rationality of two kinds of assembly joints was studied. Through low cycle reciprocating loading tests of 5 full-scale assembled RC columns and 2 cast-in-situ RC columns, the effects of assembly structure and axial compression ratio on the bearing capacity, stiffness, deformation performance and hysteretic energy consumption of the specimens were studied. The reasonable construction and construction technology of the joint are put forward. The results show that, under different axial compression ratios, the assembled RC columns with two kinds of joints have the same seismic performance as cast-in-place RC columns, and some indexes are slightly better than cast-in-place RC columns, and the stiffness of assembled RC columns at different displacement angles is better than that of cast-in-place RC columns. The degradation of bearing capacity and hysteretic energy dissipation have little difference from that of cast-in-place RC columns, and at large displacement angles (> 1 / 30), the longitudinal tendons in the overlapped zone of RC columns may break under repeated buckling and tensile action. It is suggested that the method of lap section encryption stirrups should be adopted to improve and avoid it.
【作者单位】：华侨大学土木工程学院;华侨大学福建省结构工程与防灾重点实验室;
【基金】：国家自然科学基金项目(51378228) 福建省科技重大项目(2015Y4007)
【分类号】：TU352.11;TU375.3

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