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一、前言在填筑坝的抗震设计中,坝体的地震反应是一个重要因素,这个问题正在根据数值分析、振动实验、地震观测等进行研究,但因填筑坝的振动相当复杂,故对它的地震反应特性尚不能完全予以说明。造成填筑坝地震反应复杂的主要原因,通常认为有以下几点: (1)在与坝体地震反应有关的动的物理性质方面,缺少求取某种土料弹性系数、衰减系数的合适试验方法,而且这些动的物理性质不是线性的,由此产生的变形显示出非线性变化; (2)坝体为具有向三维扩展的大型结构物;
I. Introduction In the seismic design of dams, the seismic response of the dam is an important factor. This issue is being studied based on numerical analysis, vibration experiments and seismic observations. However, due to the rather complicated vibration of dams, Its seismic response can not yet be fully explained. The main reasons that cause the seismic response of the dam are complex. Generally, the following points are considered: (1) In the dynamic physical properties related to the seismic response of the dam, there is a lack of a suitable test for obtaining the elastic coefficient and attenuation coefficient Method, and the dynamic physical properties are not linear, the resulting deformation shows a non-linear change; (2) the dam is a large structure with three-dimensional expansion;