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通过对一直径6m的刚性网格索穹顶结构试验模型进行预应力张拉成形、竖向对称加载与非对称加载试验,研究该结构模型在静载下的力学性能。应用非线性有限元数值计算方法建立刚性网格索穹顶结构的计算模型,对结构的静力学性能进行理论计算与分析,并与试验结果进行比较。结果表明:在各加载阶段,试验模型节点竖向位移实测值与理论计算结果较接近,拉索索力实测值与计算结果吻合较好,证明模型设计和试验方法合理,理论计算方法正确。
The mechanical behavior of the structural model under static load was studied through prestressing, vertical symmetrical loading and asymmetric loading on a rigid grid cable dome test model with a diameter of 6m. The nonlinear finite element numerical method is used to establish the computational model of rigid lattice cable dome structure. The static behavior of the structure is calculated and analyzed theoretically and compared with the experimental results. The results show that the measured vertical displacement of test model nodes is close to the theoretical calculation results at each loading stage, and the measured values of cable tension agree well with the calculated results. The results show that the model design and test method are reasonable and the theoretical calculation method is correct.