接长方式对结构保温板抗弯性能的影响研究

Research on the Bending Resistance of the Structural Insulated Panels with Different Connect Methods in Length

分别采用自攻螺钉(Self-tapping screw,STS)连接的对接节点、地板钉连接的搭接节点和花键节点3种接长方式对结构保温板(Structural Insulated Panels,SIP)构件进行长度接长处理,并考察了这3种接长试件的面内和面外抗弯性能。结果表明:在平面内加载条件下,对接连接具有最高的荷载承载能力和连接刚度,相比于OSB花键连接和搭接的屈服荷载分别提高了25.48%和201.72%。然而,在平面外加载条件下,OSB花键连接具有最高的荷载承载能力、变形位移和刚度。相比于对接和搭接连接,OSB花键连接试件的屈服荷载分别提高了128.78%和329.01%。SIP作为承载构件抵抗平面内荷载时,推荐采用工艺简单且成本较低的对接接长方式。

In this paper,the structural insulated panels(SIP)members were connected by butt joint using selftapping screw(STS),lap joints,and spline joints using floor nail in the length,respectively.The in-plane and out-of-plane bending resistance of the connected SIP members were evaluated.The results showed that under in-plane loading conditions,the butt connection had the highest load bearing capacity and connection stiffness,which was 25.48%and 201.72%higher than the yield load of OSB spline connection and lap connection,respectively.Under out-of-plane loading conditions,however,OSB spline connections had the highest load carrying capacity,deformation displacement,and stiffness.The yield load of the OSB spline connection was 128.78%and 329.01%higher than those of the butt and lap connection specimens,respectively.When SIP was used as a bearing member to resist in-plane load,the butt joints could be selected,which could effectively simplify the process and reduce the cost.