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采用有限元软件ABAQUS建立了钢插板胶合木预应力套管螺栓连接梁柱节点的三维有限元模型,分析了节点的受弯特性,并通过与试验结果的对比验证了模型的合理性。有限元分析结果表明,套管梁柱节点摩擦阶段的抗弯刚度较传统节点的有明显提升,基于分析结果,对钢管与钢板摩擦力、钢管外径和壁厚、高强螺栓直径和等级、木材强度和厚度等参数对套管节点抗滑移刚度的影响进行了进一步分析。依据分析结果,建议高强螺栓的预拉力值介于规定值的100%~110%之间,钢管与钢板间摩擦系数不小于0.3,钢管径厚比的合理取值范围为6~10,相应的初始应力比在0.4~0.6之间。研究成果可为胶合木构件套管螺栓连接节点的设计提供参考。
The finite element model ABAQUS was used to establish the three-dimensional finite element model of the joint of prefabricated steel prefabricated prefabricated dowel joint. The bending characteristics of the joint were analyzed and the rationality of the model was verified by comparison with the experimental results. The results of finite element analysis show that the flexural rigidity of the beam-column joints in the frictional stage is significantly higher than that of the traditional joints. Based on the analysis results, the frictional characteristics of the friction between the steel tube and the steel plate, the outer diameter and wall thickness of the steel tube, the diameter and grade of the high- The influence of strength and thickness on the anti-sliding stiffness of casing joints is further analyzed. Based on the analysis results, it is suggested that the prestress value of the high strength bolt is between 100% and 110% of the specified value, the friction coefficient between the steel pipe and the steel plate is not less than 0.3, and the reasonable value range of the steel pipe diameter to thickness ratio is 6 to 10, The initial stress ratio is between 0.4 and 0.6. The research results can provide a reference for the design of the bolted joint of the glued timber component.