全栓接蜂窝梁柱端板连接空间节点梁铰机制有限元分析  

Finite Element Analysis of Beam Hinge Mechanism for Fully Bolted Castellated Beam-to-Column Joints With End-plate Connection

作　　者：贾连光[1] 李秋镕 郑圆维 王春刚[1] JIA Lianguang;LI Qiurong;ZHENG Yuanwei;WANG Chungang(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;China Northeast Architectural Design&Research Institute Co.Ltd.,Shenyang,China,110006)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]中国建筑东北设计研究院有限公司,辽宁沈阳110006

出　　处：《沈阳建筑大学学报（自然科学版）》2023年第4期596-603,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51978422)。

摘　　要：目的提出一种全栓接蜂窝梁柱端板连接空间节点并探究节点强弱轴向蜂窝梁成铰机制的影响因素及梁铰发展规律,为工程应用提供参考。方法在验证ABAQUS模型精确度良好的基础上,建立36个蜂窝梁柱端板连接空间节点模型,分析连接刚度(端板厚度)、蜂窝梁节点转动贡献率(开孔率、开孔位置)对节点力学性能及破坏形式的影响,基于等效T型件法及组件法分析了弱轴向节点组件的节点转动贡献率。结果柱弱轴向弯曲变形及环端板对柱翼缘的约束使强轴向端板的抗弯承载能力降低,连接刚度及蜂窝梁节点转动贡献率足够时,强弱轴向最终均可形成梁铰机制,并具备良好的承载能力。结论强弱轴向端板厚度分别宜大于t_(cf)(柱翼缘厚度)与0.75 t_(cf),建议强弱轴向蜂窝梁开孔率分别为60%~65%和65%~70%,蜂窝梁节点转动贡献率可作为节点破坏模式的识别指标,并给出相应的计算方法。A fully bolted three dimensional beam-to-column joints with end-plate connection was proposed,and the influencing factors of the hinge mechanism of castellated beams in the direction of the strong and weak axis of the joint and the development law of beam hinges were explored to provide a reference for related designs.ABAQUS model was validated and 36 three dimensional beam-to-column joints with end-plate connection models were established.The influence law of connection strength(end plate thickness)and the proportion of castellated beam joint rotation contribution(opening ratio,opening position)on the mechanical properties and failure modes of joints were analyzed.Based on the component method,the joint rotation contribution of the joint components in the weak axis direction was clarified.The bending deformation in the weak axis direction of the column and the constraint of the surrounding end plate on the column flange reduce the flexural bearing capacity of the end plate in the positive axis direction,when the connection strength and the rotational contribution of the castellated beam joint are sufficient,the beam hinge mechanism can be formed in the strong and weak axial directions finally,and it has a good bearing capacity.The thickness of the strong axial end plate should be greater than t_(cf)(thickness of the column flange),the thickness of the weak axial end plate should be greater than t cf 0.75 t_(cf),and the recommended value range of the opening ratio of the strong and weak axial castellated beams is 60%~65%,65%~70%,respectively.The proportion of the joint rotation contribution of the castellated beam can be used as the identification index of the joint failure mode and the relevant calculation method is given.

关 键 词：蜂窝梁柱节点 栓接 端板连接 梁铰机制 有限元分析 

分 类 号：TU391[建筑科学—结构工程]