木-混凝土单螺栓连接抗剪承载力试验及参数化分析

Experimental and Parametric Analysis on the Shear Bearing Capacity of Single-bolted Wood-concrete Connection

针对木-混凝土单螺栓连接性能,进行了14个连接试件单调加载试验,探讨和揭示了节点的传力机制、屈服模式和破坏形态。试验结果表明,节点具有良好的延性,螺栓直径的适当增大和钢垫板的使用可有效提高节点承载力,无垫板试件初始刚度随着直径增大而提高,建议在节点设计中使用钢垫板。利用ABAQUS软件对连接节点进行非线性参数化分析,计算结果表明增大螺栓直径能够增大节点承载力,但超过一定范围增大螺栓直径对承载力的提高幅度减小。

Face to the mechanical performance of single-bolted wood-concrete connection,14 specimens of connection were tested by monotonic loading,and the force transfer,yield model and failure pattern of the connection were discovered. The experimental results showed that the connection hadgood ductility,and the bearing capacity was improved by increasing appropriately bolt diameter as well as using washer,and the initial stiffness of non-washer specimens increased with increasing diameter. It was recommended to use washer in connection design. Then carrying on the nonlinear Parametric analysis by using ABAQUS software,the results showed that the improvement of the bearing capacity decreased when the bolt diameter over a certain range.