不同连接形式预制装配式剪力墙水平缝抗剪承载力研究

发布时间：2018-07-13 21:39

【摘要】：近年来,我国建筑工业化高速发展,预制装配式混凝土结构因具有工业化程度高、建造速度快、建筑产品质量高、有利于环境保护、社会效益高等优点,在国内得到了迅速的推广和使用。但预制结构中,缝的存在对结构的整体性和受力性能有很大影响,本文对预制剪力墙水平缝抗剪承载力进行研究,这对预制装配式结构的普及和发展,具有重要意义。根据国内外预制剪力墙结构的抗震、抗剪性能试验研究成果,分析了预制剪力墙界面的受剪机理。基于套筒浆锚连接试验和焊接预留孔钢筋浆锚连接试验结果,综合分析两种钢筋连接方式的性能,并提出改进建议。分析水平缝抗剪承载力的影响因素,引用国内外规范中水平缝抗剪承载力计算公式,并结合清华大学、东南大学试验数据,对预制剪力墙水平缝抗剪承载力进行计算分析。结果表明:套筒浆锚钢筋连接和焊接预留孔钢筋浆锚连接安全可靠,能够保证钢筋的有效连接。套筒浆锚连接锚固长度为0.9al时,锚固依然安全;焊接预留孔连接形式,其钢筋锚固长度应大于0.3al。水平缝抗剪承载力的大小只与界面构造、材料性能和受力形式等有关,与水平缝的位置无关。国内外规范对预制剪力墙水平缝抗剪承载力计算结果大于墙体抗震对应的水平力,证明剪力墙水平缝抗剪性能良好,能够保证墙体抗震性能的发挥。
[Abstract]:In recent years, with the rapid development of construction industry in China, prefabricated concrete structures have the advantages of high industrialization, fast construction speed, high quality of building products, good environmental protection and high social benefits. In the domestic has been rapidly promoted and used. However, in prefabricated structures, the existence of joints has a great impact on the integrity and mechanical performance of the structure. In this paper, the shear bearing capacity of horizontal joints of precast shear walls is studied, which is of great significance to the popularization and development of prefabricated structures. Based on the experimental results of seismic and shear resistance of prefabricated shear wall structures at home and abroad, the shear mechanism of prefabricated shear wall interface is analyzed. Based on the test results of sleeve grouting anchor connection and welding reserved hole reinforced concrete anchor connection, the performance of two kinds of steel bar connection modes is analyzed synthetically, and some suggestions for improvement are put forward. The factors affecting the shear capacity of horizontal joints are analyzed. The formulas for calculating the shear capacity of horizontal joints in the codes at home and abroad are quoted. Combined with the experimental data of Tsinghua University and Southeast University, the shear capacity of the horizontal joints of prefabricated shear walls is calculated and analyzed. The results show that the connection of sleeve grouting anchor bar and welding reserved hole steel bar anchor is safe and reliable, and the effective connection of steel bar can be ensured. When the anchoring length of sleeve grouting anchor is 0.9al, the anchoring is still safe, and the length of reinforcement Anchorage should be greater than 0.3 al. in the form of welding reserved hole connection. The shear capacity of horizontal joints is only related to the interface structure, material properties and force forms, but not to the position of horizontal joints. The calculated results of shear bearing capacity of horizontal joints of precast shear walls in domestic and foreign codes are larger than the horizontal forces corresponding to the earthquake resistance of the walls, which proves that the shear properties of horizontal joints of shear walls are good and can guarantee the seismic performance of the walls.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2

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