通过构造6组直角扣件连接节点试件,进行了连接节点同时承受扭转力和滑移力的试验.试验结果表明:扣件紧固力矩越大,扣件连接节点的初始抗扭刚度越大;不同紧固力矩的扣件连接节点,在较小的扭剪作用下,其初始扭转刚度变化不大,当试件受扭剪作用逐渐增大时,紧固力矩大的直角扣件抵抗变形的能力增强.通过统计回归分析,得出直角扣件连接节点初始扭转刚度与紧固力矩的关系,以及扭转力矩与杆件转角关系.调整了钢管支架连接节点考虑扭剪效应时无侧移和有侧移架体立杆的计算长度系数,并与纯扭效应下的计算值进行了对比分析,得出扭剪同时作用下更不利于钢管支撑架体的稳定. By constructing 6 sets of right-angled fasteners to connect the joint specimens, experiments were conducted to show that the joints were subjected to torsional and sliding forces simultaneously.The experimental results show that the greater the fastening torque of fasteners, the greater the initial torsional stiffness The torsional stiffness of the fasteners with different tightening torques did not change much under the small torsional shear. When the torsional shear effect of the specimens was gradually increased, the rectangular fasteners with high tightening torque resisted the deformation The relationship between the initial torsional stiffness and the tightening torque and the relationship between the torsional moment and the corner of the rod were obtained by statistical regression analysis.The adjustment of the connection point of the steel pipe bracket with no side shift The calculation of the length coefficient of the pole with the side frame was carried out and compared with the calculated value of the pure torsion effect. It was found that the torsional shear was more unfavorable to the stability of the steel pipe support frame at the same time.