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对局部场地动力反应的有限元方法及其边界问题的处理技术进行了研究,基于ABAQUS有限元软件开发了用于局部场地反应数值模拟的人工透射边界的子程序,通过对均匀半空间的波动问题的分析,验证了局部场地动力反应分析模型和边界处理技术的可行性。算例结果表明,基于ABAQUS有限元软件建立的地震波输入方式和透射边界的用户子程序对于局部场地动力反应分析具有良好的适用性。所提方法可用于二维局部不规则、不均匀和非线性场地的地震波散射问题。
The finite element method of local site dynamic response and the processing technology of its boundary problem are studied. Based on ABAQUS finite element software, a subroutine of artificial transmission boundary for numerical simulation of local site response is developed. By analyzing the fluctuation of uniform half-space The feasibility of the dynamic response analysis model and the boundary treatment technology of the local site is verified. The results show that user subroutines based on the ABAQUS finite element software and the input method of seismic waves and the transmission boundary have good applicability to local site dynamic response analysis. The proposed method can be used to solve the problem of seismic wave scattering in two-dimensional local irregular, non-uniform and non-linear sites.