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| 瞬态温度场作用的岩体裂缝扩展追踪 | |
| 引用本文： | 孙粤琳,沈振中,张国双,张倩.瞬态温度场作用的岩体裂缝扩展追踪[J].河海大学学报(自然科学版),2009,37(1):80-85. |
| 作者姓名： | 孙粤琳 沈振中 张国双 张倩 |
| 作者单位： | 1. 河海大学水利水电工程学院,江苏,南京,210098 2. 灌南县建工质监站,江苏,连云港,222500 3. 江苏省环境科学研究院,江苏,南京,210036 |
| 基金项目： | 国家自然科学基金，江苏省高等学校研究生创新计划项目，河海大学院士学科发展基金 |
| 摘 要： | 应用无单元法建立了瞬态温度场作用的岩体裂缝扩展模型.运用断裂力学理论,分析瞬态温度场作用下岩体表面裂缝尖端温度、应力和应力强度因子的变化规律,研究裂缝扩展的临界条件并追踪裂缝的扩展过程,探讨外界温度变化率以及裂缝深度对裂缝扩展的影响.结果表明:岩体表面裂缝在变化的温度场影响下有可能发展为贯穿型裂缝,破坏结构的整体性;较高的外界温度变化率可能在较短时间和较低温度下造成表面裂缝的扩展,且裂缝深度越大,裂缝开裂也就越容易和越迅速. |
| 关 键 词： | 瞬态温度场 岩体 裂缝扩展 无单元法 |
| 修稿时间： | 2009/2/13 0:00:00 |
Trace of crack propagation of rock under action of transient temperature field |
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| SUN Yue-lin,SHEN Zhen-zhong,ZHANG Guo-shuang,ZHANG Qian.Trace of crack propagation of rock under action of transient temperature field[J].Journal of Hohai University (Natural Sciences ),2009,37(1):80-85. | |
| Authors: | SUN Yue-lin SHEN Zhen-zhong ZHANG Guo-shuang ZHANG Qian |
| Institution: | 1.College of Water Conservancy and Hydropower Engineering;Hohai University;Nanjing 210098;China;2.Guannan County Quality Supervision Station for Construction Engineering;Lianyungang 222500;3.Jiangsu Provincial Academy of Environmental Science;Nanjing 210036;China |
| Abstract: | The EFM was employed to establish the crack propagation model of rock under the action of transient temperature field.By use of the theories of the fracture mechanics,variation of temperature,stress and stress intensity factor at the crack tip on the rock surface under the action of transient temperature field was analyzed.The critical conditions for and the process of the crack propagation or rock were studied,and the effects of the growth rate of external temperature and crack depth on the crack propagati... |
| Keywords: | transient temperature field rock crack propagation EFM |
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