胶合木梁柱嵌入钢板-螺栓拼接节点纯弯与弯剪性能试验研究

发布时间：2018-03-06 23:15

本文选题：胶合木　切入点：螺栓连接节点　出处：《建筑结构学报》2016年04期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:In order to study the failure mechanism, the change rule and calculation method of flexural bearing capacity of Liang Zhu embedded steel plate and bolt splicing joints under pure bending and bending shear composite loads, three groups of 15 full-scale joint specimens were designed and made. Based on the method of calculating the bearing capacity of single bolt joint, The calculation method of joint bending capacity considering the effect of joint shear to bending ratio is established. The test and calculation results show that the main failure mode of joint under combined bending and shear loads is wood transverse split failure. The nonlinear characteristics of the moment-angle curve are more obvious due to shear force; the bending capacity and ductility decrease with the increase of the shear-bending ratio of the joints; the shear-bending ratio of the joints decreases by 31.7% and 15. 6 respectively. Based on the analysis of the existing calculation methods of the bending bearing capacity of joints, it can be concluded that the calculation method based on the van der Put model has a higher accuracy (deviation from the test value is less than 16%), but based on the Jensen model and according to the European specifications. The results of en 1995-1-1 prediction were conservative.
【作者单位】：同济大学建筑工程系;
【基金】：国家自然科学基金项目(51008221,51478336)
【分类号】：TU366.3

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