剪刀撑对高支模体系稳定性影响的模拟

The Simulation Analysis on Effect of Bridging on Stability of High-Formwork-Support System

目的研究扣件式钢管高支模体系中剪刀撑的布置对其稳定性的影响.方法以ANSYS有限元软件模拟高支模真型试验为依托,模拟建立无剪刀撑体系模型,分别对有、无剪刀撑体系屈曲分析,分析研究两模型的4阶屈曲模态.结果有剪刀撑支架体系去掉剪刀撑后,稳定承载力由59.867 kN减小为50.949 kN,下降了15%.结论剪刀撑可以保障架体重心的稳定,四周连续布置的竖向剪刀撑对架体承载力和稳定性影响较大,在支架体系中不容忽视.

This paper studies the effect of bridging on stability of steel tubular formwork support with cou- pler. ANSYS is used to simulate the prototype experiment of high-formwork-support system and establish the model of high-formwork-support system without bridging. Getting the first four buckling shapes of models of high-formwork-support system with or without bridging is performed eigenvalue buckling analysis. When high-formwork-support system removes the bridging, stability capacity reduces from 59. 867kN to 50. 949kN, decreased by 15%. The results show that bridging can guarantee the stability of the center of gravity. Vertical bridging with serial arrangements has great influence on the stable bearing capacity and stability of formwork support.