螺栓连接预制构件结合面直剪性能试验研究
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摘要
针对适用于装配式多层混凝土剪力墙结构竖向接缝的干式连接方法进行直剪力学性能试验研究。这种连接方法采用高强螺栓连接,预制构件边缘无外露钢筋,具有生产、施工效率高等特点。设计并制作了4组共8个预制构件结合面试件,研究结合面的抗剪性能。研究表明,螺栓连接预制构件结合面的直剪破坏模式基本一致,与螺杆接触处的混凝土出现局压破坏,螺栓受拉剪产生弯曲变形;结合面的抗剪承载力主要来源于结合面间摩擦力和螺栓销栓力;增加墙体的厚度对承载力和刚度的提升效果不明显,增大连接螺栓直径可以有效地提高试件的承载力。结合试件工作机理给出了结合面抗剪承载力计算公式,为工程应用与标准编制提供依据。
The experimental research on direct shear mechanical performance of the vertical joints of prefabricated multi-storey concrete shear wall structure by means of the dry connection method were studied. This connection method uses high-strength bolt connection, and there is no exposed steel bar in prefabricated component edge. It has the characteristics of high production and high construction efficiency. Four groups of eight prefabricated components were designed and manufactured to study the shear resistance of the joint interface. The research shows that the direct shear failure mode of the joint interface of bolted prefabricated members is basically the same. The concrete contact with the bolts is damaged by local compression, and the bolts become deformed under tension and shear forces. The shear bearing capacity of the joint interface mainly comes from the friction force between the joint interfaces and the bolt pin force. Increasing the thickness of the wall has no obvious effect on the increase of the bearing capacity and stiffness. Increasing the diameter of the connecting bolt can effectively improve the bearing capacity of specimens. Based on the working mechanism of the specimens, the formulas for calculating the shear bearing capacity of the interface were given, which provide a basis for engineering application and standard compilation.
The experimental research on direct shear mechanical performance of the vertical joints of prefabricated multi-storey concrete shear wall structure by means of the dry connection method were studied. This connection method uses high-strength bolt connection, and there is no exposed steel bar in prefabricated component edge. It has the characteristics of high production and high construction efficiency. Four groups of eight prefabricated components were designed and manufactured to study the shear resistance of the joint interface. The research shows that the direct shear failure mode of the joint interface of bolted prefabricated members is basically the same. The concrete contact with the bolts is damaged by local compression, and the bolts become deformed under tension and shear forces. The shear bearing capacity of the joint interface mainly comes from the friction force between the joint interfaces and the bolt pin force. Increasing the thickness of the wall has no obvious effect on the increase of the bearing capacity and stiffness. Increasing the diameter of the connecting bolt can effectively improve the bearing capacity of specimens. Based on the working mechanism of the specimens, the formulas for calculating the shear bearing capacity of the interface were given, which provide a basis for engineering application and standard compilation.
引文
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[14] 装配式混凝土结构技术规程:JGJ 1—2014 [S].北京:中国建筑工业出版社,2014:85-86.
[2] 张微敬,钱稼茹,于检生,等.竖向分布钢筋单排间接搭接的带现浇暗柱预制剪力墙抗震性能试验[J].土木工程学报,2012,45(10):89-97.
[3] 胡玉学.加强型水平拼接预制混凝土剪力墙抗震性能试验研究[D].哈尔滨:哈尔滨工业大学,2014.
[4] 肖健.预制装配整体式剪力墙结构体系技术和应用研究[J].住宅产业,2012,142(5):50-52.
[5] 朱张峰,郭正兴.预制装配式剪力墙结构节点抗震性能试验研究[J].土木工程学报,2012,45(1):69-76.
[6] 陈定球,刘斌.低多层装配式混凝土墙板结构体系研究综述[J].建筑结构,2016,46(S1):633-636.
[7] 朱张峰,郭正兴,朱寅,等.不同连接构造的装配式混凝土剪力墙抗震性能试验研究[J].湖南大学学报(自然科学版),2017,44(3):55-60.
[8] 张皓,张子航,李永强.全尺寸预制装配式剪力墙竖向连接节点受力性能数值分析[J].建筑结构,2017,47(S1):885-889.
[9] 张军,侯海泉,董年才,等.全预制装配整体式剪力墙住宅结构设计及应用[J].施工技术,2009,38(5):22-24.
[10] 王亚超,李俊峰,蒋世林,等.装配式混凝土结构设计关键连接技术研究[J].建筑结构,2016,46(10):91-94.
[11] 钢结构高强螺栓连接技术规程:JGJ 82—2011[S].北京:中国建筑工业出版社,2011.
[12] NEHRP commentary on the guidelines for the seismic rehabilitation of buildings:FEMA 274 [S].Washington D.C.:Federal Emergency Management Agency,1997.
[13] 赵作周,周剑,侯建群,等.装配式混凝土剪力墙结构水平缝抗剪机理及承载力计算方法综述[J].建筑结构,2015,45(12):40-47,39.
[14] 装配式混凝土结构技术规程:JGJ 1—2014 [S].北京:中国建筑工业出版社,2014:85-86.