本文選題：重力壩　切入點(diǎn)：地震易損性　出處：《人民黃河》2017年12期 　論文類型：期刊論文

【摘要】：針對采用彈性損傷模型進(jìn)行重力壩地震易損性分析效率較低的問題,分別采用線彈性模型和彈性損傷模型對重力壩進(jìn)行動(dòng)力時(shí)程分析,獲得相應(yīng)的線彈性震損指標(biāo)(超應(yīng)力單峰面積)和彈性損傷震損指標(biāo)(損傷指數(shù)),建立了單峰面積與損傷指數(shù)之間的相關(guān)關(guān)系。提出了一種基于單峰面積與損傷指數(shù)相關(guān)性的地震易損性分析方法,即用線彈性動(dòng)力計(jì)算得到的單峰面積近似估計(jì)壩體損傷指數(shù),進(jìn)而確定重力壩震損等級,以及超過各震損等級的概率,最后擬合出地震易損性曲線。將該方法應(yīng)用于某重力壩的地震易損性分析,計(jì)算結(jié)果符合一般規(guī)律,計(jì)算效率得到極大提高。
[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.
【作者單位】： 四川大學(xué)水利水電學(xué)院水力學(xué)與山區(qū)河流開發(fā)保護(hù)國家重點(diǎn)實(shí)驗(yàn)室;
【分類號】：TV312;TV64

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本文編號：1604284