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采用钢管混凝土统一理论和多线性随动强化模型 ,并引入等效紧箍力 ,研究钢管混凝土肋拱面内极限承载力 ,给出了模拟钢管混凝土肋拱面内受力全过程的物理模型、力学模型、数学模型。通过模拟全过程的位移变化和极限承载力 ,对各个阶段的定性和定量分析 ,并与两个模型试验的比较 ,说明了该模型的适用性和正确性 ,模拟结果表明与试验结果吻合良好 ,并探讨了弹性极限值、屈服极限与极限承载力的比例关系。
The unified theory of steel tube concrete and the multi-linear follow-up strengthening model are introduced, and the equivalent tight hoop force is introduced to study the ultimate bearing capacity of the ribbed steel ribbed arch surface. The physical model of the whole process of the ribbed steel ribbed arch surface is given, Mechanical model, mathematical model. Through the simulation of the displacement and the ultimate bearing capacity of the whole process, the qualitative and quantitative analysis of each stage and the comparison with the two model tests show the applicability and correctness of the model. The simulation results show that the model is in good agreement with the test results, The relationship between elastic limit, yield limit and ultimate bearing capacity was also discussed.