岩土力学2013，Vol.34Issue(3)：721-726,6.
土石坝坡抗震极限分析上限法
Upper bound method for seismic stability limit analysis of earth-rock dams
摘要
Abstract
A new approach based on the limit analysis upper bound theorem is proposed to study the seismic stability of earth-rock dams. First, according to the upper bound analysis, a perfectly plastic soil model is assumed with an associated flow rule. Then, the dam slope is divided into horizontal slices with regarding the sliding surface as an arbitrary surface. In order to obtain the maximum anti-seismic capability of dams and the corresponding sliding surface, the multivariate function is established by the energy-work balance equation and optimized by intelligent algorithm. For the study of the influences of shear strength parameters and horizontal slice number on the maximum anti-seismic capability and the sliding surface, the new approach is applied to a typical earth-rock dam with core wall. It is shown by the results that the horizontal slice number has a great influence on the sliding surface but a small influence on the maximum anti-seismic capability. When the horizontal slices achieve a certain number, the maximum anti-seismic capability of dams is ultimately a stable value. Meanwhile, the shear strength parameters of the rockfill materials have a great influence on the maximum anti-seismic capability. Compared with the limit equilibrium method the result illustrates the correctness and feasibility of the proposed method.关键词
土石坝/极限分析/上限定理/极限抗震能力Key words
earth-rock dams/ limit analysis/ upper bound theorem/ maximum anti-seismic capability分类
建筑与水利引用本文复制引用
杨昕光,迟世春..土石坝坡抗震极限分析上限法[J].岩土力学,2013,34(3):721-726,6.基金项目
国家自然科学基金(No.50979014,No.51179024) （No.50979014,No.51179024）
高等学校博士点基金(No.20090041110016). （No.20090041110016）
