法向循环加卸载条件下节理力学特征研究

doi:10.13722/j.cnki.jrme.2015.0610

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摘要

将节理法向循环加卸载试验所得的法向应力–闭合量曲线分别采用半对数、双曲线本构方程进行拟合，得到2种类型节理法向刚度表达式，并将其引入持续屈服节理模型中，同时编写节理法向循环加卸载程序，首次实现节理非线性本构循环加卸载数值模拟分析。研究结果表明：建立的节理法向非线性本构循环加卸载数值试验方法行之有效；由双曲线方程得到的节理法向刚度值较由半对数方程得到的法向刚度值略有不同，但2种方法得到的节理法向应力–闭合量曲线数值模拟结果均与室内试验十分接近，均可有效表征节理法向循环加卸载力学特征。研究成果可为后续节理岩体动力学性质研究，边坡动力响应分析以及边坡稳定性、安全性评价等奠定基础。

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	吴顺川1
	高艳华1
	李永兵1
	刘波1
	柴金飞1
	高斌2

关键词 ：岩石力学, 持续屈服节理模型, 节理法向刚度, 节理法向闭合量, 节理法向循环加卸载试验

Abstract：

According to experimental data of joint normal cyclic loading/unloading，joint normal stiffness expressions are gained from hyperbolic function and semi-log function respectively which are used to fit joint normal stiffness-closure curves. These expressions are implemented into continuously yielding joint model and cyclic loading/unloading programs are edited by FISH language embedded within three-dimensional distinct element code(3DEC). The numerical simulation of a rock joint under normal cyclic loading/unloading is conducted. The results show that the numerical simulation method in this paper is valid and that joint normal stiffness values gained from hyperbolic function are different from semi-log function，but both of normal stress-closure curves from two functions are really close to laboratory test results and meet joint properties under normal cyclic loading/unloading. The results can finally lay a foundation for studies on the dynamic properties of rock mass，the dynamic response analysis and the assessment of stability and safety of slope in rock mass engineering.

Key words： rock mechanics continuously yielding joint model joint normal stiffness joint normal closure normal cyclic loading/unloading test of joint

引用本文:

吴顺川1，高艳华1，李永兵1，刘波1，柴金飞1，高斌2. 法向循环加卸载条件下节理力学特征研究[J]. 岩石力学与工程学报, 2015, 34(S2): 3683-3693.
WU Shunchuan1，GAO Yanhua1，LI Yongbing1，LIU Bo1，CHAI Jinfei1，GAO Bin2. A STUDY OF MECHANICAL PROPERTIES OF JOINT UNDER NORMAL CYCLIC LOADING/UNLOADING. , 2015, 34(S2): 3683-3693.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.0610 或 https://rockmech.whrsm.ac.cn/CN/Y2015/V34/IS2/3683

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