基于强度折减有限元法的土石坝抗震稳定分析
|
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.
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.
引文
[1]顾淦臣.土石坝地震工程[M].南京:河海大学出版社,1989.
[2]SL203-97,水工建筑物抗震设计规范[S].北京:中国水利水电出版社,1998.
[3]孙涛,顾波.边坡稳定性分析评述[J].岩土工程界,2002,3(11):48-50.
[4]程晔,赵明华,曹文贵.基桩下溶洞顶板稳定性评价的强度折减有限元法[J].岩土工程学报,2005,27(1):38-41.
[5]宋二祥,高翔,邱玥.基坑土钉支护安全系数的强度折减有限元方法[J].岩土工程学报,2005,27(3):258-263.
[6]Qian-jun XU,Hong-lei Yin,Xian-feng Cao.Atempera-ture-driven strength reduction method for slope stabili-ty analysis[J].Mechanics Research Communication,2009,36(2,2):224-231.
[7]Griffiths D V,Lane P A.Slope stability analysis by fi-nite elements[J].Geotechnique,1999,49(3):387-403.
[8]郑颖人,赵尚毅.岩土工程极限有限元法及其应用[J].土木工程学报,2005,38(1):91-98.
[9]欧阳君,徐千军,严新军,侍克斌.基于ABAQUS软件的土石坝应力、应变分析[J].水资源与水工程学报,2009,20(6):112-115.
[10]张锐.高土石坝地震作用效应及坝坡抗震稳定分析研究[D].大连:大连理工大学,2008.
[2]SL203-97,水工建筑物抗震设计规范[S].北京:中国水利水电出版社,1998.
[3]孙涛,顾波.边坡稳定性分析评述[J].岩土工程界,2002,3(11):48-50.
[4]程晔,赵明华,曹文贵.基桩下溶洞顶板稳定性评价的强度折减有限元法[J].岩土工程学报,2005,27(1):38-41.
[5]宋二祥,高翔,邱玥.基坑土钉支护安全系数的强度折减有限元方法[J].岩土工程学报,2005,27(3):258-263.
[6]Qian-jun XU,Hong-lei Yin,Xian-feng Cao.Atempera-ture-driven strength reduction method for slope stabili-ty analysis[J].Mechanics Research Communication,2009,36(2,2):224-231.
[7]Griffiths D V,Lane P A.Slope stability analysis by fi-nite elements[J].Geotechnique,1999,49(3):387-403.
[8]郑颖人,赵尚毅.岩土工程极限有限元法及其应用[J].土木工程学报,2005,38(1):91-98.
[9]欧阳君,徐千军,严新军,侍克斌.基于ABAQUS软件的土石坝应力、应变分析[J].水资源与水工程学报,2009,20(6):112-115.
[10]张锐.高土石坝地震作用效应及坝坡抗震稳定分析研究[D].大连:大连理工大学,2008.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心