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在对直角扣件转动刚度试验研究的基础上,考虑直角扣件的半刚性性质,对大量不同搭设参数下的满堂支撑架进行考虑初始缺陷的非线性有限元分析,得到无、有剪刀撑设置的满堂支撑架的理论承载力及失稳模态。通过13个满堂支撑架的原型试验,对其实际受力性能进行研究。有限元结果与试验结果吻合较好,证明了有限元模型建立的正确性。在有限元分析及试验研究的基础上,基于设置剪刀撑后发生失稳时波长为两倍步距的极限状态,提出计算满堂支撑架承载力的简化计算模型,此种模型考虑了直角扣件半刚性性质及水平杆对立杆稳定性的影响,更加符合实际。
Based on the experimental study on the rotational stiffness of the right-angled fasteners, considering the semi-rigid properties of the right angled fasteners, a nonlinear finite element analysis considering the initial flaws of a large number of different supporting parameters under different setting parameters was obtained. The full capacity of the theoretical support frame and destabilization mode. Through the prototype test of 13 full-scale supporter, the actual force performance is studied. Finite element results agree well with the experimental results, which proves the correctness of the finite element model. Based on the finite element analysis and experimental study, a simplified calculation model for calculating the bearing capacity of a full-scale support was proposed based on the limit state of double-step wavelength when the instability occurred after setting the scissor support. This model considered the rectangular fastener The semi-rigid nature and the effect of the level bar on the stability of the upright bar are more in line with the reality.