焊接空心球连接H型钢Z字形螺栓节点静力性能研究  

Study on static performance of welded hollow spherical and Z-shaped bolted joint with H-beams

作　　者：张爱林[1,2] 李传浩 刘学春 陈学森[1,2] ZHANG Ailin;LI Chuanhao;LIU Xuechun;CHEN Xuesen(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China;Beijing Engineering Research Center of High-Rise and Large-Span Prestressed Steel Structures,Beijing 100124,China)

机构地区：[1]北京工业大学城市建设学部,北京100124 [2]北京市高层和大跨度预应力钢结构工程技术研究中心,北京100124

出　　处：《建筑结构》2024年第19期74-79,89,共7页Building Structure

基　　金：国家自然基金重点项目(52130809)。

摘　　要：提出了一种新型焊接空心球连接H型钢Z字形螺栓节点(新型螺栓节点),该节点适用于全装配大跨度弦支穹顶结构体系上部网壳连接。该节点的弦杆采用热轧H型钢,方便栓接、施工便捷、制造能耗低,可以实现部品部件到体系的标准化。为了研究新型螺栓节点的静力性能,对该节点进行了轴压、轴拉、纯弯和压弯荷载工况下的有限元分析,研究了该节点在不同荷载工况下的破坏模式、承载力、刚度、延性等力学性能指标,对比分析了新型螺栓节点与焊接空心球连接H型钢焊接节点(焊接节点)的破坏模式和静力性能。研究表明,在轴压和压弯荷载下新型螺栓节点和焊接节点的极限破坏模式均为H型钢弦杆局部屈曲和屈服,在轴拉荷载下新型螺栓节点和焊接节点的极限破坏模式均为H型钢弦杆全截面屈服,在纯弯荷载下新型螺栓节点和焊接节点的极限破坏模式均为H型钢弦杆局部屈曲。新型螺栓节点可以实现塑性铰远离焊缝和拼接区,符合“强连接,弱杆件”的设计要求。A novel welded hollow spherical and Z-shaped bolted joint with H-beams(novel bolted joint)is proposed,which is suitable for the upper reticulated shell connection of fully assembled long-span suspen-dome structure system.The chord of the joint is made of hot-rolled H-beams with easy bolting,rapid assembly,low manufacturing energy consumption,and may realize the the standardization of parts and components to the system.In order to study the static performance of novel bolted joints,finite element analysis of the joints was carried out under axial compression,axial tension,bending moment and compression-bending loading conditions.The failure mode,bearing capacity,stiffness and ductility of the joints under different load conditions were studied.The failure mode and static performance of novel bolted joint and welded hollow spherical welded joint with H-beams(welded joint)were compared.The research shows that the ultimate failure modes of novel bolted joint and welded joint are local buckling and yielding of H-beam chords under axial compression and compression-bending loading conditions.Under axial tensile load,the ultimate failure modes of novel bolted joint and welded joint were full-section yield of H-beam chord.Under bending moment load,the ultimate failure modes of novel bolted joint and welded joint were local buckling of H-beam chords.Novel bolted joint may realize that the plastic hinges far away from the welds and connection region,which meets design requirement of"strong connection and weak member".

关 键 词：大跨度空间钢结构 全装配 H型钢 Z字形螺栓节点 静力性能 

分 类 号：TU393.3[建筑科学—结构工程]