胶合木端板连接节点低周反复试验与承载力

Low Cyclic Reversed Experiment and Capacity of Glued Laminated Timber Connections with Steel End Plate

摘要:

提出一种适用于胶合木节点的内嵌钢板端板连接形式.对2个具有不同厚度端板的新型节点及1个常用的内嵌钢板螺栓连接节点进行了低周反复加载试验.结果表明：新型节点的延性以及耗能能力有较大提高，端板厚度是影响新型节点性能的重要因素.对新型节点的屈服荷载，根据虚功原理推导了其计算公式；对新型节点的极限承载力，分析比较了其破坏模式和各模式的承载力计算公式.计算结果与试验结果符合较好.基于上述研究，提出了端板厚度的选取建议.

关键词:胶合木; 端板连接; 延性; 承载力; 低周反复试验

Abstract:

A new type of connection with slottedin steel plates and steel end plate was proposed for glued laminated timber structures. Experiments on new connections with different thicknesses of steel end plates and a bolted connection with slottedin steel plates were conducted under low cyclic reversed loading. The results show that the new type connection makes progress in ductility and energy dissipation. Conclusions can also be obtained that there are close correlations between the thickness of the end plate and the performance of the new type connection. A formula for the yield load of the end plate connections was deduced based on virtual work principle. Three failure modes of the new type of connection were analyzed and the bearing capacity formulas for each mode were deduced. The calculation results of the formulas agree well with those of the experiments. Several suggestions for the selection of the end plate thickness are given.

Key words:glued laminated timber; endplate connection; ductility; bearing capacity; low cyclic reversed test