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预应力索杆协同网架结构是一种上弦和腹杆为刚性杆件,下弦杆件被替换为预应力拉索的新型结构。利用ANSYS有限元分析软件建立了该结构的有限元模型,通过改变材料参数和施加温度荷载的方式来考虑温度对结构的影响,并考虑几何非线性与材料非线性,模拟了结构的反应特征,得到应力、变形变化规律和蠕变对结构的影响,为预应力索杆协同网架结构的抗火设计提供了参考依据。
Prestressed cable coordination grid structure is a winding and web for the rigid rod, the lower chord member is replaced by a new prestressed cable structure. The finite element model of the structure was established by using ANSYS finite element analysis software. The influence of temperature on the structure was considered by changing the material parameters and applying temperature load. The structural response was simulated considering geometric nonlinearity and material nonlinearity. The stress and deformation rules and the influence of creep on the structure are obtained, which provide references for the fire-resistant design of the prestressed cable-bar cooperative grid structure.