Research on Mechanical Properties of Stainless Steel Connectors of Precast Concrete Sandwich Walls
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摘要: 针对预制夹芯保温墙不锈钢连接件的抗拔性能,设计了4种不同端部锚固构造的连接件,对其抗拔承载力、破坏形态、荷载-位移曲线等进行了拉拔试验研究。结果表明:试件的破坏模式以混凝土锥形体锚固破坏为主,试件的抗拔承载力均达到20 kN以上。参考已有的理论计算模型对预制夹芯保温墙体不锈钢连接件的抗拔承载力理论值进行了计算,并与试验结果进行对比。抗拔承载力试验值为理论值的1.46倍以上,4种不锈钢连接件均具有很好的安全储备。Abstract: The pull-out resistance of stainless steel connectors of precast concrete sandwich walls was studied in the paper. Four kinds of connectors with different end anchoring structures were designed, and the pull-out resistance, failure mode and load-displacement curve were studied. The results showed that the failure modes of the specimens were mainly concrete cone pulled out. The pull-out resistance of the specimens was more than 20 kN. Based on the existing theoretical model, the pull-out resistance of the stainless steel connectors was calculated and compared with the test results. The test value was 1.6 times more than the design value, four kinds of stainless steel connectors all showed good safety reserves.
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