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以广州市临江大道双层隧道的交叉口结构为工程背景,采用有限元分析程序Ansys建立了空间板梁模型,通过仿真分析得到了结构在恒载、土压力、活载及温度梯度荷载组合作用下的受力及变形特征,验算了隧道交叉口结构在正常使用极限状态和承载能力极限状态下的受力状况。计算结果表明:隧道交叉口结构具有较大的刚度和强度,且各项受力性能满足规范的要求。
Taking the intersection structure of double-decked tunnel in Linjiang Avenue of Guangzhou as the engineering background, the finite element analysis program Ansys was used to establish the model of the space girder. Through the simulation analysis, the structure of the girder with constant load, earth pressure, live load and temperature gradient load combination Under the action of the force and deformation characteristics, checking the tunnel intersection structure in the normal use of the ultimate state and bearing capacity of the ultimate state of stress conditions. The calculation results show that the structure of the tunnel intersection has greater rigidity and strength, and the mechanical properties meet the requirements of the code.