考虑震损指标相关性的重力坝地震易损性分析

发布时间：2018-03-13 02:01

本文选题：重力坝　切入点：地震易损性　出处：《人民黄河》2017年12期 　论文类型：期刊论文

【摘要】：针对采用弹性损伤模型进行重力坝地震易损性分析效率较低的问题,分别采用线弹性模型和弹性损伤模型对重力坝进行动力时程分析,获得相应的线弹性震损指标(超应力单峰面积)和弹性损伤震损指标(损伤指数),建立了单峰面积与损伤指数之间的相关关系。提出了一种基于单峰面积与损伤指数相关性的地震易损性分析方法,即用线弹性动力计算得到的单峰面积近似估计坝体损伤指数,进而确定重力坝震损等级,以及超过各震损等级的概率,最后拟合出地震易损性曲线。将该方法应用于某重力坝的地震易损性分析,计算结果符合一般规律,计算效率得到极大提高。
[Abstract]:Aiming at the low efficiency of seismic vulnerability analysis of gravity dams with elastic damage model, the linear elastic model and elastic damage model are used to analyze the dynamic time history of gravity dams, respectively. The corresponding linear elastic damage index (single peak area) and elastic damage damage index (damage index) are obtained. The correlation between single peak area and damage index is established. A new method based on single peak area and damage index is proposed. The method of seismic vulnerability analysis based on exponential correlation, That is to say, the damage index of dam body is estimated approximately by using the single peak area obtained by linear elastic dynamic calculation, and then the earthquake damage grade of gravity dam and the probability of exceeding each damage grade are determined. Finally, the seismic vulnerability curve is fitted, and the method is applied to the seismic vulnerability analysis of a gravity dam. The calculated results accord with the general rules and the calculation efficiency is greatly improved.
【作者单位】：四川大学水利水电学院水力学与山区河流开发保护国家重点实验室;
【分类号】：TV312;TV64

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