方钢管混凝土柱全螺栓装配式连接节点抗震性能数值分析  

Numerical Analysis of Seismic Performance of Fully Bolted Prefabricated CFSST Column Connection Joints

作　　者：林晓俊 张爱林 张艳霞[1,2,3] 沈森 LIN Xiaojun;ZHANG Ailin;ZHANG Yanxia;SHEN Sen(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Energy Conservation&Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center,Beijing University of Civil Engineering and Architecture,Beijing 102627,China;Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学北京节能减排与城乡可持续发展省部共建协同创新中心,北京102627 [3]北京建筑大学工程结构与新材料北京市高校工程研究中心,北京100044

出　　处：《建筑钢结构进展》2025年第4期56-68,共13页Progress in Steel Building Structures

基　　金：国家自然科学基金(51778036);北京市教委科研计划(KZ201910016018);长江学者和创新团队发展计划(IRT_17R06)。

摘　　要：为解决钢管混凝土柱与柱连接节点现场焊接导致的污染严重、建设效率低等问题,结合十字形芯筒方便加工和施工的优点,在课题组提出的自攻螺栓芯筒式柱节点的基础上,提出一种新型连接节点,即内置十字形芯筒方钢管混凝土柱全螺栓装配式连接节点。基于该连接节点的拟静力试验结果,利用ABAQUS软件建立数值分析模型,以验证模拟方法的可靠性,并针对自攻螺栓、加劲肋和十字形芯筒的不同构造组合开展参数化分析。研究结果表明:数值分析结果与试验结果吻合较好,验证了数值分析方法的可靠性;自攻螺栓有效抑制了法兰板的翘曲变形和相对开口,使节点抗弯承载力平均提高了19.94%,延缓了节点的刚度退化;加劲肋抑制了法兰板变形,使节点抗弯承载力平均提高了3.70%,但增大了法兰板发生相对开口的可能性;十字形芯筒有效抑制了法兰板的翘曲变形和柱壁局部鼓曲,提高了节点承载力和刚度,延缓了刚度退化。总体来说,加劲肋对该节点抗弯承载力的影响不大,且增大了上下法兰板的相对开口。因此可将方钢管混凝土柱全螺栓装配节点优化为芯筒和自攻螺栓的组合形式,十字形芯筒与自攻螺栓和混凝土之间具有良好的协同工作机制,优化前后的节点均能实现“强节点、弱构件”的性能化设计目标,可在实际工程中应用。In order to solve the problems of serious pollution and low construction efficiency caused by on-site welding of concrete-filled steel tubular column-column connection joints,and to integrate the advantages of cross-shaped core tubes for convenient processing and construction,a new type of connection joint is proposed.This joint is a fully bolted assembly connection joint with built-in cross-shaped core tube for concrete-filled square steel tubular(CFSST)columns,based on the self-tapping bolt and core tube column joint proposed by the research group.Based on the proposed static test results of this connection joint,a numerical analysis model is established using ABAQUS software to verify the reliability of the simulation method,and a parametric analysis is carried out for the different combinations of self-tapping bolts,stiffening ribs and cross-shaped core tube.The results show that the numerical analysis results are in good agreement with the test results,which verifies the reliability of the numerical analysis method.The self-tapping bolts effectively inhibit the buckling deformation and relative opening of the flange plate,which increases the joint bending capacity by 19.94%on average,and slows down the stiffness degradation of the joint.The stiffening ribs inhibit the deformation of the flange plate,which increases the joint bending capacity by 3.70%on average,but increases the possibility of relative opening.The cross-shaped core tubes effectively inhibit the buckling deformation of the flange plate and the local buckling of the column wall,increasing the bearing capacity and stiffness,and delaying the stiffness degradation of the joint.Overall,the stiffening ribs have little effect on the bending capacity of the joint,and increase the relative openings of the upper and lower flange plates.Therefore,the fully bolted assembly joint for CFSST columns can be optimized as a combination of core tube and self-tapping bolts,and the cross-shaped core tube,self-tapping bolts and concrete have a good mechanism of syn

关 键 词：十字形芯筒 方钢管混凝土柱 自攻螺栓 抗震性能 数值分析 

分 类 号：TU391[建筑科学—结构工程]