基于强度折减有限元法的土石坝抗震稳定分析  

Anti-Seismic Stability Analysis of Earth-Rock Dam Based on Strength Reduction FEM

作　　者：严新军[1] 欧阳君[1] 宫经伟[1] 侍克斌[1] 徐千军[1,2] 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《新疆农业大学学报》2010年第3期259-263,共5页Journal of Xinjiang Agricultural University

基　　金：新疆维吾尔自治区高校科研计划青年教师科研启动基金(XJEDU2008S27);清华大学水沙科学与水利水电工程国家重点实验室开放基金(sklhse-2008-D-01);新疆水利水电工程重点学科基金资助(XJZDXK-2002-10-05)

摘　　要：将土石坝的拟静力法抗震稳定计算与强度折减有限元法相结合,对土石坝边坡稳定性进行有限元计算。按《水工建筑物抗震设计规范》(SL203-97)的规定,依据坝高动态分布系数施加水平等效地震惯性力,然后用基于ABAQUS软件环境下的温控参数强度折减有限元法确定土石坝边坡的临界失稳状态及其所对应的安全系数。结果表明,采用此法进行土石坝边坡抗震稳定分析与传统的极限平衡Bishop法相比,不仅计算结果一致,且可直观反映土石坝的应力、应变和整个坝坡破坏发展过程。The stability of earth-rock dam was calculated based on the methods of Pseudo-static stability analysis of the earth-rock dam in combination with the strength reduction FEM. The critical unstable state of rockfill dam slope and its corresponding safety coefficient were determined according to the provision of Specifications for Anti-seismic Design of Hydraulic Structures （SL203-97）, horizontal equivalent seismic inertia force of dynamic distribution coefficient of dam altitude, and the strength reduction FEM based on temperature parameter of ABAQUS software. The analysis shows that the calculated results gained from these two methods showed no difference. Also, this method can reflect the stress, strain and the broking process of the slope.

关 键 词：坝坡稳定分析 强度折减有限元法 地震惯性力 拟静力法 

分 类 号：TU311.2[建筑科学—结构工程]