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中文摘要：
针对深埋地下结构的荷载环境特点,提出了深埋地下结构静动力耦合计算过程中边界条件的合理设置方法。该方法通过构建边界上的力系来平衡计算区域的初始地应力,然后将该力系设置成阶跃函数形式的动荷载作用于边界,并与后续的动荷载共同作用。研究表明,一次完整的地下结构静动力耦合分析过程,边界条件必须经过变换设置才能得到合理的计算结果。另外,只要计算软件具有黏性边界条件设置功能就能准确地完成地下结构静动力耦合响应分析。算例分析显示,该边界条件设置方法精度和效率高,简单适用。
英文摘要：
Based on the specialty of loading environment for the deep underground structure, a reasonable boundary condition setting method is developed to the coupled static and dynamic response analysis of deep structure. The system of forces on the boundaries of computational region is determined and used to match the inner initial earth stresses; and then the system of forces is transformed to that of dynamic forces in the form of step function. Finally, this system of dynamic forces and subsequent dynamic loading act together. Research results show that the reasonable results can be gotten through indispensable transform of boundary condition during a complete coupled static and dynamic analysis. In addition, the coupled static and dynamic response analysis can be done well with the artificial viscous boundary condition in soitware simply. The case studies indicate that the boundary condition setting method has many advantages such as good accuracy, efficiency and convenience.
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