混凝土面板坝面板动力损伤有限元分析

孔宪京; 徐斌; 邹德高; 单其宽; 胡志强

doi:10.11779/CJGE201409004

混凝土面板坝面板动力损伤有限元分析 English Version

孔宪京^{1, 2},
徐斌^1,2,,
邹德高^{1, 2},
单其宽²,
胡志强^{1, 2}

1. 大连理工大学海岸与近海工程国家重点实验室,辽宁大连 116024;
2. 大连理工大学水利工程学院,辽宁大连 116024

基金项目: 地震行业科研专项经费项目（201208013）; 国家自然科学基金重大研究计划集成项目（91215301）; 国家自然科学基金项目（51379028; 51279025）; 新世纪优秀人才支持计划资助项目（NCET-12-0083）

详细信息

作者简介:
孔宪京（1952- ）,男,江苏南京人,博士,教授,博士生导师,主要从事高土石坝抗震和岩土地震工程研究。E-mail: kongxj@dlut.edu.cn。

通讯作者:
徐斌

中图分类号: TU435；TV641.43
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- 文章访问数: 334
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出版历程
- 收稿日期: 2014-01-05
- 发布日期: 2014-09-21

Finite element dynamic analysis for seismic damage of slabs of concrete faced rockfill dams

KONG Xian-jing^{1, 2},
XU Bin^1,2,,
ZOU De-gao^{1, 2},
SHAN Qi-kuan²,
HU Zhi-qiang^{1, 2}

1. State Key Laboratory of Coastal & Offshore Engineering, Dalian University of Technology, Dalian 116024, China;
2. School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 联合采用混凝土塑性损伤模型和堆石料弹塑性本构模型,建立了面板堆石坝弹塑性动力分析方法,研究了地震荷载作用下混凝土面板的损伤发生和发展过程。计算结果表明：地震时,在0.65H（H为坝高）附近顺坡向拉应力最大,面板首先在该部位出现损伤,同时由于鞭稍效应,0.85H面板附近也出现损伤;采用损伤模型,损伤部位的面板出现软化,应力得到释放,计算结果比线弹性模型更加合理;采用塑性损伤模型可以反映混凝土面板渐进破坏过程,通过损伤变量可以清晰地了解面板的损伤分布和薄弱环节。此研究成果可以为进一步开展混凝土面板堆石坝极限抗震能力及抗震措施分析提供有效手段。
- 混凝土面板堆石坝 /
- 塑性损伤 /
- 弹塑性分析 /
- 本构模型
Abstract: A 3D elastic-plastic dynamic analysis procedure platform for concrete faced rockfill dams (CFRD) is developed by combining the elastic-plastic model for rock-fill materials with the plastic damage model for concrete. The damage occurrence and development process of concrete slabs under earthquake load are investigated using the procedure. The results show that the maximum slope-direction tensile stress of the slabs occurs at the height of 0.65 of the dam and results in the tensile damage of the slabs at this position during earthquakes. Also, the tensile damage of the slabs occurs at the height of 0.85 of the dam because of the “whiplash effect”. The plastic damage model for concrete can reflect the damage process of the slab precisely. The damage variable can be used to analyze of the damage distribution and weakness position of the slabs. The research results may provide an effective method for the studies on the limit aseismic capacity and the aseismic design of CFRDs.
- CFRD /
- plastic damage /
- elastic-plastic analysis /
- constitutive model

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参考文献(16)

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