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纵筋合并连接的装配式钢筋混凝土剪力墙平面内受力性能
刘立平1, 余杰1, 廖东峰2, 刘及进3, 邓小华4, 李英民1
1.重庆大学 土木工程学院, 重庆 400045;2.重庆长厦安基建筑设计有限公司, 重庆 401324;3.中冶赛迪工程技术股份有限公司, 重庆 400013;4.重庆市设计院, 重庆 400015
摘要:
钢筋混凝土剪力墙的钢筋数量较多而直径较小,装配时钢筋的连接工作量大且质量不易保证,纵筋合并连接是一种可能的解决方案。基于剪力墙截面设计方法分析了纵筋合并连接的可行性;通过3个剪力墙试件的拟静力试验验证了纵筋合并连接的有效性;采用有限元模拟方法分析了不同纵筋合并连接的装配式钢筋混凝土剪力墙受力性能。结果表明:当连接钢筋截面面积(强度)不小于原配筋截面面积(强度)且沿墙长均匀分布时,纵筋合并连接的装配式钢筋混凝土剪力墙仍表现出较好的抗震性能;边缘构件纵筋合并连接的剪力墙延性可能降低,宜慎重采用;分布钢筋采用合并连接对剪力墙的平面内受力性能影响较小,是一种较合理的合并连接方式,但连接钢筋布置位置宜沿墙长均匀分布,而不应集中于中性轴附近;未考虑纵筋合并连接对装配式钢筋混凝土剪力墙平面外受力性能、墙体抗裂性能及抗冲击能力等的削弱,因此,在应用时要考虑到此局限性。
关键词:  装配式剪力墙  纵筋合并连接  拟静力试验  有限元分析  受力性能
DOI:10.11835/j.issn.2096-6717.2019.113
分类号:TU317.1
基金项目:国家重点研发计划(2016YFC0701506)
In-plane mechanical properties of assembled reinforced concrete shear walls with longitudinal reinforcements combined by connecting rebars
Liu Liping1, Yu Jie1, Liao Dongfeng2, Liu Jijin3, Deng Xiaohua4, Li Yingmin1
1.School of Civil Engineering, Chongqing University, Chongqing 400045, P. R. China;2.Chongqing Changxia Anji Architectural Design Co., Ltd., Chongqing 401324, P. R. China;3.CISDI Engineering Co., Ltd., Chongqing 400013, P. R. China;4.Chongqing Architectural Design Institute Co., Ltd., Chongqing 400015, P. R. China
Abstract:
The number of steel bars in reinforced concrete shear walls is generally large while the diameter is small, making the workload of connections heavy and the quality difficult to guarantee in assembling. In such a case, the longitudinal reinforcement combined connection is a possible solution. Based on the section design method, the feasibility of the longitudinal reinforcement combined connection is analyzed, which is verified through the quasi-static test of three shear wall specimens. The mechanical behavior of assembled reinforced concrete shear walls with different connecting rebars is analysed by finite element simulation method. The results show that the assembled reinforced concrete shear walls with connecting rebars equalizes to the original reinforcements in terms of area and strength and evenly distributed along the wall length still exhibit good seismic performance. It is indicated that the ductility of shear walls with connecting rebars in edge members may be reduced. Therefore, it is advised to adopt it with caution. It has little effect on the in-plane mechanical properties of shear walls to combine the distributed steel bars by connecting rebars, which is a more reasonable way of combining connections, but the location of the connecting rebars should be evenly distributed along the wall length rather than concentrated near the neutral axis. The out-of-plane mechanical behavior, crack resistance and impact resistance of the assembled reinforced concrete shear wall with longitudinal reinforcements combined by connecting rebars are not considered in this study, which should be taken into account in furthor application.
Key words:  assembled shear wall  longitudinal bar combined connection  quasi-static test  finite element analysis  mechanical behavior
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