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为研究胶合木梁柱嵌入钢板-螺栓拼接节点在纯弯和弯剪复合荷载作用下的破坏机理、受弯承载力的变化规律和计算方法,设计并制作了3组共15个足尺节点试件,对其进行单调加载试验。以单螺栓节点横纹承载力计算方法为基础,经推导建立了考虑节点剪弯比影响的节点受弯承载力计算方法。试验和计算结果表明:弯剪复合荷载作用下节点的主要破坏模式为木材横纹劈裂破坏;剪力导致弯矩-转角曲线非线性特征更为明显;节点受弯承载力和延性随节点剪弯比的增大而减小;节点的剪弯比变化使节点受弯承载力和延性下降最多分别达到31.7%和15.6%。此外,对已有的节点受弯承载力计算方法分析可知:基于van der Put模型的节点受弯承载力计算方法具有较高的精度(与试验值偏差在16%以内);而基于Jensen模型和按欧洲规范EN 1995-1-1预测的结果则偏于保守。
In order to study the failure mechanism, the variation law of flexural capacity and the calculation method of bending moment and bending shear stress of embedded steel plate-bolted joint of glued wooden beam-column, three groups of 15 full- Pieces, monotonous loading test. Based on the calculation method of the cross-bar bearing capacity of single-bolt joints, the calculation method of the flexural capacity of the joints considering the influence of the shear-bending ratio of the joints is established. The results of tests and calculations show that the main failure mode of the joints under the bending-shear composite load is the destruction of the wood striae; the nonlinear characteristics of the bending moment-rotation curve are more obvious; the flexural capacity and ductility of the joints with the shear of the joints The bending ratio increases and decreases. The change of the bending ratio of the joints decreases the flexural capacity and the ductility of the joints up to 31.7% and 15.6% respectively. In addition, the calculation method of flexural capacity of existing nodes shows that the calculation method of flexural capacity based on van der Put model has higher accuracy (less than 16% deviation from the experimental value); and based on the Jensen model and The results predicted by European Directive EN 1995-1-1 tend to be conservative.