针对库水作用下心墙堆石坝湿化与流变耦合影响下的坝体变形问题,结合邓肯—张 E-B模型、修正沈珠江湿化模型和沈珠江三参数流变模型,提出了湿化流变耦合计算模型,同时基于 ABAQUS 平台子程序开发,实现了考虑坝体堆石料湿化流变耦合分析,并进行了相应的验证及坝高从 100～300 m 的敏感性分析.结果表明,耦合作用下的上游堆石体沉降量较非耦合作用下增加约 12%～16%,向上游位移减小约 5%～10%,且耦合作用对坝体变形的影响随坝高增大而愈发显著.该研究可更为准确地考虑湿化与流变耦合作用下的坝体变形,对心墙堆石坝的设计、施工具有现实的理论意义和应用价值.
Numerical Simulation of Rheological and Wetting Coupling for Core Rockfill Dam Based on ABAQUS
Aiming at the dam deformation problem of core rockfill dam under the coupling effect of humidification and rheology at the action of reservoir water,a calculation model of humidification and rheology coupling is proposed by com-bining Duncan-Zhang E-B model,modified Shen Zhujiang humidification model and Shen Zhujiang three-parameter rheo-logical model.At the same time,based on the subroutine development of ABAQUS platform,the humidification and rhe-ology coupling analysis of dam rockfill material is realized,and the corresponding verification and sensitivity analysis of dam height from 100 m to 300 m are carried out.The results show that the upstream rockfill settlement under the cou-pling effect increases by about 12%-16%,and the upstream displacement decreases by about 5%-10%,compared with the non-coupling effect.Moreover,the influence of coupling effect on dam deformation becomes more significant with the increase of dam height.This study can more accurately consider the dam deformation under the coupling effect of humidi-fication and rheology,and has practical theoretical significance and application value for the design and construction of core rockfill dam.
NETL
NSTL
万方数据
