大跨度装配式单层网壳十字形半刚性螺栓连接节点抗弯性能研究  

Research on the Flexural Performance of Cross-shaped Plate Semi-rigid Bolted Joints for Large-span Single-layer Space Grid Shell

作　　者：张爱林[1,2] 罗兵 姜子钦 ZHANG Ailin;LUO Bing;JIANG Ziqin(College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China;Beijing Engineering Research Center of High-rise and Large-span Pre-stressed Steel Structure,Beijing 100124,China)

机构地区：[1]北京工业大学建筑工程学院,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：《北京工业大学学报》2024年第11期1273-1284,共12页Journal of Beijing University of Technology

基　　金：国家自然科学基金重点资助项目(52130809)。

摘　　要：装配式连接节点是大跨度装配式单层空间网壳结构体系的关键。提出一种适用于大跨度单层网壳结构的十字形板装配式节点。该节点由圆钢管、十字形钢板、角钢、矩形连接盖板、圆盖板和高强螺栓组成,其中圆钢管、盖板、十字形钢板在工厂焊接,现场将十字形板和角钢、矩形盖板用高强螺栓连接。该节点通过设置角钢、矩形连接盖板和十字形钢板螺栓连接,在节点受到弯曲荷载时,角钢和矩形连接盖板可以首先承受弯曲荷载,从而减少节点内侧的十字形钢板塑性损伤,并且提高节点的抗弯性能。利用有限元模拟方法,构建新型连接节点有限元模型,分析了十字形钢板和角钢厚度等变量如何影响节点在平面内外的抗弯性能。通过对各组成部分尺寸的参数化研究,得到了这些因素对所提出的连接节点平面内外抗弯性能的影响规律。研究结果表明,采用角钢与矩形盖板相连接形成的十字形节点,在抗弯刚度和承载力方面表现出了优异的性能。通过调节十字形板厚度、螺栓个数、角钢和盖板厚度可调控节点的初始抗弯刚度和抗弯承载力。基于刚性节点设计方法,对该半刚性节点进行尺寸理论设计,结果表明该方法可以保证节点弯矩设计值基本达到圆钢管的屈服弯矩,满足设计要求,提高节点安全。Assembly joints are crucial to structures,and this paper proposes a cruciform plate assembly joint suitable for large-span single-layer grid shell structures.The joint consists of circular steel pipes,cruciform steel plates,angle steel,rectangular connection cover plates,circular cover plates,and high-strength bolts.Circular steel pipes,cover plates,and cruciform steel plates are welded in the factory,while cruciform plates,angle steel,and rectangular cover plates are connected using high-strength bolts on-site.By setting angle steel,rectangular connection cover plates,and cruciform steel plates bolt connections,when the joint is subjected to bending loads,angle steel and rectangular connection cover plates can initially bear the bending loads,thereby protecting the cruciform steel plates inside the joint from damage and enhancing the bending resistance of the joint.Utilizing finite element simulation methods,a finite element model of the new connection joint was constructed,and the effect of variables such as the thickness of cruciform plates and angle steel on the bending resistance of the joint in-plane and out-of-plane was analyzed.Through parametric studies of the dimensions of each component,the influence of these factors on the in-plane and out-of-plane bending resistance of the new connection joint is determined.The research results show that the cruciform joint formed by connecting angle steel with rectangular cover plates exhibits excellent performance in terms of bending stiffness and load-bearing capacity.By adjusting the thickness of the cruciform plate,the number of bolts,and the thickness of angle steel and cover plates,the initial bending stiffness and bending load-bearing capacity of the joint can be regulated.Meanwhile,based on rigid joint design methods,theoretical design of the semi-rigid joint was conducted,and the results show that this method can ensure that the design bending moment of the joint basically reaches the yield bending moment of circular steel pipes,fulfilling the design specif

关 键 词：大跨度单层空间网壳 十字形板螺栓装配式节点 数值模拟 抗弯性能 屈服弯矩 节点尺寸设计 

分 类 号：TU399[建筑科学—结构工程]