半刚性钢框架稳定理论的扣件式钢管满堂支撑体系极限承载力分析
Ultimate load-carrying capacity analysis of Fastener steel tube full-hall formwork support systems on stability theory of semi-rigid steel frame

在考虑直角扣件半刚性以及材料、几何非线性等因素的情况下，对两个扣件式钢管满堂支撑体系模型（无剪刀撑S1模型、有剪刀撑S2模型）进行非线性屈曲分析，得到体系竖向荷载-位移曲线，确定了体系极限承载力. 采用半刚性钢框架稳定理论，对无剪刀撑S1模型承载力进行计算. 将所得结果与数值结果对比，验证了半刚性钢框架稳定理论在计算体系承载力的可行性. 对直角扣件的转动性能进行试验，得到弯矩-转角曲线. 采用ANSYS中的COMBIN39弹簧单元对直角扣件的转动进行模拟.
By considering semi-rigid properties of right angles couplers，material and geometry nonlinearity， the nonlinear buckling analysis were performed on two Fastener steel tube full-hall formwork support systems (no cross bracing model S1，cross bracing model S2)，the vertical load-deflection curve of systems were obtained，and ultimate bearing capacity were determined. Stability theory of semi-rigid steel frame was used to calculate the bearing capacity of S1 model，the comparison of the result with the numerical result verified stability theory of semi-rigid steel frame is feasible in calculating bearing capacity of systems. Rotation performance of right angle couplers were tested，and moment-rotation curve of couplers were obtained. COMBIN39 spring element of ANSYS was used to simulate the rotation of right angle couplers