拱坝地震响应的动力控制研究

首次运用脉冲控制原理对一混凝土典型拱坝的地震响应进行了分析,建立和推导了有关数学模型,讨论并给出了基于位移控制、速度控制和加速度控制时,脉冲控制力的表达形式,设计了相应的控制算法。在时域内根据位移控制准则对典型拱坝在松潘地震波作用下的地震响应进行了分析,给出了拱坝关键部位的计算结果,并与未加控制的情况相比较,通过综合分析,对拱坝的动力控制进行探讨,得到了一些有益的看法。

Dynamic Control of Seismic Responses of Arch Dams

Seismic responses of a typical arch dam are studied by use of the principle of pulse control for the first time.A mathematical model is established.Expressions of three pulse control schemes based on the criteria of displacement control,velocity control and acceleration control are given.A corresponding algorithm is designed. The earthquake responses of the arch dam excited by Song Pan waves in the time domain are studied based on the criterion of displacement control.Dynamic stresses and displacements at the key location of the dam are given.For comparison,the results in the absence of control are also calculated.After synthetical analysis,some conclusions about dynamic control of arch dams are drawn.