基于内聚力模型的高心墙堆石坝坝顶裂缝模拟及其成因分析.pdfVIP

See discussions, stats, and author profiles for this publication at: /publication/287322405 Modeling of dam crest cracks of high core rockfill dam based on cohesive zone model and crack formation analysis Article in hongnan Daxue Xuebao ( iran Kexue Ban)/Journal of Central South University (Science and Technology) · July 2014 CITATIONS READS 0 34 5 authors, including: Gang Ma Hong heng Wuhan University Chinese Academy of Sciences 75 PUBLICATIONS 235 CITATIONS 191 PUBLICATIONS 1 332 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Combined FDEM modeling of the scaling effects in rockfill materials View project Investigations on Bottleneck Problems in Numerical Manifold Methods View project All content following this page was uploaded by Gang Ma on 02 January 2017. The user has requested enhancement of the downloaded file. 第 45 卷第 7 期 () Vol.45 No.7 2014 年 7 月 Journal of Central South University (Science and Technology) July 2014 (武汉大学 水资源与水电工程科学国家重点实验室，湖北 武汉，430072) 将基于弹塑性断裂力学的内聚力模型引入有限元法，采用非线性界面单元，通过定义界面单元的法向和切 向应力与张开和滑移变形之间的关系描述裂缝发生后的界面力学特性，模拟某高心墙堆石坝的坝顶裂缝。计算过 程中考虑筑坝材料的流变和湿化变形。研究结果表明：基于内聚力模型的有限元法计算出的裂缝与实际情况比较 吻合。采用该方法计算了蓄水期之后 3 年的坝顶裂缝，裂缝变化幅度微小，较为稳定，且并未深入心墙。在首次 蓄水的过程中，上游堆石流变和湿化变形较大，上下游坝壳料沉降不均匀程度也较大，因此，坝体变形不协调导 致坝顶出现纵向裂缝。 心墙堆石坝；内聚力模型；裂缝；裂缝成因 TV641 ；TV