新型螺栓球柱节点静力承载性能试验研究

在传统网架螺栓球节点的基础上，研发了一种可用于无檩网架的新型节点——螺栓球柱节点.进行了13个螺栓球柱节点的承载力试验.试验结果表明，螺栓球柱节点主要有圆柱筒壁压扁破坏、圆柱筒壁冲切破坏、螺栓拔出破坏、焊缝拉裂破坏等4种破坏模式；在压力和拉力荷载作用下，圆柱筒壁主要承受环向应力；设置加劲肋可以较大幅度地提高节点承载力和增强节点刚度.
Based on the conventional bolt ball joint of gird structure, a novel gird structure joint——bolted ball cylinder joint which could be used on non purlin gird structure was created. Load bearing capacity experiments including 13 bolted ball cylinder joints were conducted. First, the experimental program was introduced in detail. Subsequently, the collapse phenomena of bolted ball cylinder joint were described. It is found that their failure modes mainly include flattening damage of cylinder wall, punching failure of cylinder wall, bolt pullout failure and weld strength failure. The cylinder wall is mainly subjected to hoop stress when the joint is under tension or compression. Setting stiffener can effectively increase the load bearing capacity and stiffness of joint