动力分析的缩减自由度方法及大坝的地震反应

REDUCTION INTEGRATE METHOD IN DYNAMIC ANALYSIS AND EARTHQUAKE RESPONSE OF GRAVITY DAMS

摘要: 本文研究了缩减自由度的逐步积分方法,导出了它的截断误差表达式,并与振型迭加和Wilson—θ法直接积分进行了比较,表明了方法对大型结构地震反应分析的有效性。并在线弹性假定下,用低弹模模拟坝基中的软弱带,分析计算了这种非均匀地基的软弱带对重力坝动力时程反应的影响,与均匀地基上重力坝的结果进行了比较。

Abstract: In this paper, a simplffed dynamic algorithm and it's accuracy analysis has been research, using this method, the influence of the fault in rock upon the dynamic response af concrete gravity dam is also calculated and analyzed.