水利水电科技进展2018，Vol.38Issue(2)：70-76,7.DOI:10.3880/j.issn.1006-7647.2018.02.012
考虑渗流体力的某大坝地震响应仿真分析
Simulation analysis of seismic response for a dam considering seepage force
摘要
Abstract
For the problem that the seepage force should be considered in the static and dynamic calculation of the concrete connecting section and the homogeneous loam section of a reservoir dam, a method for calculating the seepage force is proposed. A new Fortran subroutine was developed in this study to be implemented into the commercial finite element software MSC.Marc, and the whole seismic response process of the dam was simulated and analyzed. The calculation results show that, under the design earthquake with a 10% exceeding probability in 50 years, the absolute horizontal acceleration response extremum of the dam body is 5.0 m/s2and the maximum amplification factor is 7.70. The maximum permanent deformation under vertical earthquake is mainly concentrated at the maximum cross section near the top of the dam and the earthquake subsidence is about 0.06% of the dam height. The maximum ground motion acceleration and the dynamic displacement response is located at the local of the dam crest. It can be concluded that there is an obvious"whiplash effect"on the dam crest where seismic strengthening should be carried out. The design and filling standard of each district is reasonable as well as the dam filling scheme,and the seismic safety of the dam is good.关键词
均质土坝/地震响应/渗流体力/抗震分析/仿真分析Key words
homogeneous earth dam/seismic response/seepage force/seismic analysis/simulation analysis分类
建筑与水利引用本文复制引用
韩彰,苏怀智,李慧..考虑渗流体力的某大坝地震响应仿真分析[J].水利水电科技进展,2018,38(2):70-76,7.基金项目
国家重点研发计划 (2016YFC0401601) （2016YFC0401601）
国家自然科学基金(51579083,51479054) （51579083,51479054）
