新型装配式结构柱拼装节点力学性能试验研究

发布时间：2018-06-12 19:59

本文选题：装配式结构 + 拼装柱　；参考：《华侨大学》2013年硕士论文

【摘要】：为适应我国高层建筑产业工业化发展的需求，在钢筋混凝土柱-钢梁(Reinforced concrete column-steel beam, RCS)混合框架结构这一新型结构形式基础上，，提出一种在柱中反弯点附近拼装的RC柱-柱拼装节点。该拼装节点由下柱的杯口定位，通过榫柱连接，焊接纵筋，后浇拼装段，以实现结构沿竖向拼装。该拼装节点拼装效率高、性能可靠。本文完成了7个足尺拼装柱轴压性能试验和1个偏压性能试验，重点开展了以下四方面研究工作：(1)拼装柱后浇前轴压及偏压性能试验；(2)后浇段不同养护时间下，拼装柱轴压性能试验，重点研究拼装柱在不同阶段的施工性能；(3)分析了拼装柱轴压性能的抵抗机理，推导了拼装柱的轴压承载力计算公式；(4)提出了相关设计和施工建议。试验研究表明：拼装柱后浇前，轴心抗压承载力为2564kN，为整浇RC柱承载力的46.2%；RC柱拼装节点轴心抗压承载力略低于整浇柱，并随后浇段养护时间的增加而增加；与整浇柱的整体压溃不同，RC柱拼装节点的破坏形态为上部榫柱“挤入”下部后浇部分，导致下部后浇部分向外膨胀，并最终发生劈裂破坏，破坏过程有明显预兆，表现出较好的延性。完成了6个足尺拼装柱抗剪及抗弯性能试验，重点研究了拼装段配箍构造对拼装柱抗剪性能的影响和拼装构造对试件抗弯性能的影响。抗剪性能试验结果表明，RC柱拼装节点抗剪强度随拼装段箍筋数量的增加而提高，拼装段设置2道复合箍即可保证试件抗剪强度高于整浇柱。抗弯性能试验结果表明，拼装试件屈服承载力比整浇试件提高5.3%，且拼装试件弯曲刚度与整浇试件基本相同，可满足使用要求。
[Abstract]:In order to meet the needs of industrialization development of high-rise building industry in China, a new type of RC column-column assembly joint is proposed on the basis of reinforced concrete column-steel beam (RC) hybrid frame structure, which is assembled near the reverse bending point in the column. The joint is located by the cup mouth of the lower column, joined by tenon post, welded longitudinal reinforcement and cast-in-place assembly section after pouring, so that the structure can be assembled along the vertical direction. The assembly node has high efficiency and reliable performance. In this paper, seven full-scale column axial compression tests and one bias performance test have been completed. The following four aspects of research work have been carried out emphatically: 1) Pre-axial compression test and biasing compression performance test of post-pouring column with different curing time. This paper analyzes the resistance mechanism of the axial compression performance of the assembled columns, deduces the formula for calculating the axial compression capacity of the assembled columns, and puts forward the relevant design and construction suggestions. The experimental results show that the axial compression bearing capacity is 2564kN before post-pouring, which is a little lower than that of cast-in-place RC column assembly joints, and then increases with the increase of curing time of cast-in-place section. Different from the integral crushing of the cast-in-place column, the failure pattern of the RC column assembly joint is that the upper tenon column "squeezes" into the lower part of the post-pouring part, which causes the lower part of the post-pouring part to expand outwards, and finally the splitting failure occurs, and the failure process has obvious foreboding. It shows good ductility. The shear and flexural properties of six full-scale assembled columns were tested, and the influence of the hoop structure on the shear resistance and the flexural behavior of the assembled columns were studied. The results of shear test show that the shear strength of the joints of RC columns increases with the increase of stirrups, and the shear strength of the joints is higher than that of cast-in-place columns. The results of flexural properties test show that the yield bearing capacity of the assembled specimens is 5.33% higher than that of the cast-in-place specimens, and the bending stiffness of the assembled specimens is basically the same as that of the cast-in-situ specimens, which can meet the requirements of application.
【学位授予单位】：华侨大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.2

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