Study on a Method for Calculating the Stresses of Concrete Dam Upstream Vertical Cracks Extending Based on Fracture Mechanics and FEM

毛海涛; 王晓菊; 张学林; 姜海波

doi:10.13409/j.cnki.jdpme.2014.06.016

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Study on a Method for Calculating the Stresses of Concrete Dam Upstream Vertical Cracks Extending Based on Fracture Mechanics and FEM

更新时间：2025-12-11

- Study on a Method for Calculating the Stresses of Concrete Dam Upstream Vertical Cracks Extending Based on Fracture Mechanics and FEM
- Vol. 34, Issue 6, Pages: 764-770(2014)
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- DOI：10.13409/j.cnki.jdpme.2014.06.016
  CLC： V642.2;TV313
- Published：2014
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[1]毛海涛,王晓菊,张学林,姜海波.基于断裂力学和有限元的碾压混凝土坝劈头裂缝扩展的应力计算研究[J].防灾减灾工程学报,2014,34(06):764-770.

毛海涛, 王晓菊, 张学林, et al. Study on a Method for Calculating the Stresses of Concrete Dam Upstream Vertical Cracks Extending Based on Fracture Mechanics and FEM[J]. 2014, 34(6): 764-770.
[1]毛海涛,王晓菊,张学林,姜海波.基于断裂力学和有限元的碾压混凝土坝劈头裂缝扩展的应力计算研究[J].防灾减灾工程学报,2014,34(06):764-770. DOI： 10.13409/j.cnki.jdpme.2014.06.016.

毛海涛, 王晓菊, 张学林, et al. Study on a Method for Calculating the Stresses of Concrete Dam Upstream Vertical Cracks Extending Based on Fracture Mechanics and FEM[J]. 2014, 34(6): 764-770. DOI： 10.13409/j.cnki.jdpme.2014.06.016.

摘要

混凝土坝的劈头裂缝属于断裂力学中描述的张开型（I型）裂缝。劈头裂缝应力计算中

强度因子KI和材料开裂韧度KIC是判断劈头裂缝扩展的关键参数。采用断裂力学的基本理论推导裂缝应力计算的基本公式

并借助有限元来确定强度因子和材料开裂韧度

对寒冷地区实际工程坝体裂缝进行计算

得出运行期4日型寒潮期和不同运行时段的温度裂缝长度和强度因子。通过对比发现

计算结果与大坝运行期不同工况裂缝的实际情况相符合

验证了方法的正确性。

Abstract

Upstream vertical cracks of concrete dam belong to the open type of fracture mechanics（I）fracture.Cleavage cracks′intensity factor（KI）and fracture toughness（KIC）are the key parameters to judge the vertical cracks′extending.This article uses the basic theory of fracture mechanics to deduce them

and uses finite element to confirm the intensity factors and fracture toughness and calculates them by the actual engineering.Dam construction and operation are consistent with the actual situation.Calculation method of dam abutment crack parameters here can provide scientific basis for the safety evaluation of dams.

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references

龙滩重力坝三维仿真与劈头裂缝问题研究 [J]. 张国新,许平,朱伯芳,梁建文. 中国水利水电科学研究院学报 . 2003(02)

柘溪大坝1号支墩劈头裂缝处理 [J]. 李友楼. 湖南电力 . 2002(05)

混凝土断裂韧度及临界裂缝尖端张开位移——基于虚拟裂缝模型的分析 [J]. 吴智敏,徐世烺,王金来. 三峡大学学报(自然科学版) . 2002(01)

大体积混凝土温度应力与温度控制[M]. 中国电力出版社 , 朱伯芳著, 1999

Determination of fracture energy, process zone longth and brittleness number from size effect, with application to rock and conerete [J] . Z. P. Ba

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