【摘要】：在我國西南地區(qū),由于地質(zhì)條件復(fù)雜,在庫區(qū)存在許多大的潛在滑坡體。這些潛在滑坡體在水庫建成后,由于水位的抬升及水庫運行效應(yīng)的影響,長期處于干濕交替狀態(tài),抗滑穩(wěn)定性下降,在地震、暴雨或水位快速變動等情況下可能導(dǎo)致大規(guī)�；麦w失穩(wěn)滑入水庫。這些滑坡體一旦失穩(wěn),將會影響水庫的安全運行,而且其激起的涌浪將會對壩體造成強烈沖擊,出現(xiàn)潰壩或者涌浪漫過大壩的危險情況,影響滑坡發(fā)生區(qū)附近和下游人民生命財產(chǎn)的安全。 目前的大壩,都是按靜力載荷及地震動載荷設(shè)計的。對于大壩抵抗涌浪沖擊的能力一般不予考慮,因為有關(guān)的計算非常復(fù)雜,有關(guān)的理論不完善。涌浪的高水頭沖擊壓力與地震動作用的不同組合將會額外增大高壩破壞的風(fēng)險。為了探討地震滑坡涌浪下的混凝土重力壩損傷破壞情況,本文主要進行了以下三方面工作： (1)本文關(guān)心的是壩體的損傷破壞情況,假定壩體建在剛性地基上,不考慮地基-壩體的相互影響。分析選取了較為合理經(jīng)試驗驗證的涌浪壓力模式,壩體材料采用混凝土的塑性損傷本構(gòu)模型,選取了Koyna壩體斷面為計算對象,建立計算模型。 (2)滑坡涌浪可能發(fā)生在震前震后甚至地震動中間的任何時刻與地震動作用疊加增大對壩體的影響,本文針對不同地震動峰值和不同涌浪高度下壩體在這些組合時刻的響應(yīng)進行了計算分析。 (3)進行了震后壩體的涌浪超載分析和有無涌浪時壩體地震超載分析。
[Abstract]:There are many large potential landslide bodies in the reservoir area because of the complex geological conditions in southwest China. After the completion of the reservoir, these potential landslide bodies, due to the uplift of the water level and the effect of the reservoir operation effect, are in a long period of dry and wet alternating state, and the stability of the anti-slide is decreased, and the stability of the landslide is decreased in the earthquake. Heavy rain or rapid change of water level may lead to large-scale landslide sliding into the reservoir. Once the landslide is unstable, it will affect the safe operation of the reservoir, and the surge caused by the landslide will have a strong impact on the dam body, resulting in the danger of dam break or romantic surges over the dam. Affect the safety of life and property of people near and downstream of landslide occurrence area. At present, dams are designed according to static load and ground motion load. The ability of dam to resist surge is generally not considered because the calculation is very complicated and the theory is not perfect. Different combinations of high head impact pressure and ground motion will increase the risk of high dam failure. In order to discuss the damage and failure of concrete gravity dam under earthquake landslide surge wave, this paper mainly carried out the following three aspects of work: (1) this paper is concerned with the damage and failure of the dam body, assuming that the dam body is built on rigid foundation. The interaction between foundation and dam is not considered. The reasonable surge pressure model verified by test is selected. The plastic damage constitutive model of concrete is used in dam material. The section of Koyna dam is selected as the calculating object and the calculation model is established. (2) the influence of landslide surge on dam body may occur at any time before earthquake or even in the middle of ground motion. In this paper, the responses of dam body at these combined times under different peak ground motion and different surge height are calculated and analyzed. (3) the wave overloading analysis of the dam body after the earthquake and the seismic overload analysis of the dam body with or without surge waves are carried out.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV642.3;TV313

【參考文獻】

相關(guān)期刊論文 前10條

1 周劍華;水庫滑坡涌浪災(zāi)害的數(shù)值研究[J];長江科學(xué)院院報;2003年02期

2 任坤杰;金峰;徐勤勤;;滑坡涌浪垂面二維數(shù)值模擬[J];長江科學(xué)院院報;2006年02期

3 杜修力，陳厚群，侯順載;拱壩系統(tǒng)三維非線性地震波動分析[J];地震工程與工程振動;1996年03期

4 林皋;;汶川大地震中大壩震害與大壩抗震安全性分析[J];大連理工大學(xué)學(xué)報;2009年05期

5 李樹武;劉惠軍;;某水電站庫區(qū)滑坡滑速涌浪預(yù)測[J];地質(zhì)災(zāi)害與環(huán)境保護;2006年01期

6 林皋;;混凝土大壩抗震安全評價的發(fā)展趨向[J];防災(zāi)減災(zāi)工程學(xué)報;2006年01期

7 陳厚群;;汶川地震后對大壩抗震安全的思考[J];中國工程科學(xué);2009年06期

8 杜成斌,蘇擎柱;混凝土壩地震動力損傷分析[J];工程力學(xué);2003年05期

9 徐明輝;趙長軍;任志勇;高勇;賀金明;;滑坡涌浪實例與預(yù)測[J];資源環(huán)境與工程;2011年05期

10 朱詩鰲;;瓦依昂壩留下的思考[J];湖北水力發(fā)電;2006年01期

相關(guān)博士學(xué)位論文 前1條

1 黃錦林;庫岸滑坡涌浪對壩體影響研究[D];天津大學(xué);2012年

，

本文編號：2407992