【摘要】 本文的前部分,给出一个求解平板支墩坝中的支墩—横撑体系沿坝轴线方向振动基频的近似计算方法。该方法根据的原理是广义变位法。为了描述各支墩的侧向变位,对每个支墩都设定一个广义坐标和形状函数。根据各形状函数,导出了一组用以计算各广义质量和各广义刚度的公式。当进行动力计算时,就可根据各广义质量和各广义刚度的值,将平板支墩坝的支墩—横撑体系代换为一个非常简单的动力计算模型:质点—弹簧体系。在这一部分中,给有计算例题。 本文的后部分,给出一个原型观测的结果。计算和实测数据相比较,二者基本吻合。更多还原

【Abstract】 The first part of the paper deals with an approximate method for Calculating the fundamental frequency of buttress-braces system in the slab and buttress dam vibrating in the direction of dam axis. This method is based on the principle of generalized displacement. For every buttress a generalized coordinate and a shape function are assigned to describe its lateral displacement. According to this shape function a set of formulas for calculating the generalized masses and generalized stiffness has been derived. When we make the dynamic analysis, the given system may be replaced by a very simple masses-springs model on the basis of the values of generalized masses and generalized stiffness. Illustrative examples are given in this prat.The last part of the paper presents a report on the results of a prototype observation.The Comparison of the results of Calculation with that of the experimental field investigation shows that they basically agree with each other.更多还原