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介绍空间结构的动力学平衡方程。通过对某145m跨三心圆网壳结构进行有限元建模分析,比较其在一致激励下输入加速度时程与位移时程的计算结果,并最终采用位移时程分析法作为考虑行波效应的计算方法。通过位移时程法分析了结构在不同地震波、不同波速下的响应。结果表明:在大跨度结构的抗震分析中,为得到杆件正确的内力计算结果,对其进行考虑行波效应的时程分析是必要的。
Introduce the dynamic equilibrium equation of space structure. Through the finite element modeling and analysis of a 145m span trilocular reticulated shell structure, the calculation results of the input acceleration time history and displacement time history under the uniform excitation are compared, and finally the displacement time history analysis method is used as the traveling wave effect Calculation method. Displacement time-history method is used to analyze the response of structures under different seismic wave velocities. The results show that it is necessary to consider the time-history analysis of the traveling wave effect in the seismic analysis of long-span structures in order to obtain the correct internal force calculation results.