摘要
针对层状边坡岩体结构的赋存特点和初始缺陷特性,应用初始后屈曲理论和突变理论探讨了边坡岩体结构的分岔性态和稳定性态,得出了岩体结构的分岔方程和分岔载荷计算公式,确定了边坡岩体后屈曲状态下溃屈破坏的上下限,建立了边坡岩体结构溃屈破坏的判据,并以雅砻江下游的霸王山边坡为例给出了工程实例.研究结果表明:边坡岩体结构在其分岔点的临界值是由其突变模型的分岔集确定的;初始后屈曲理论可揭示层状边坡岩体结构后屈曲平衡路径和平衡构形的稳定性;只有考虑了边坡岩体的实际缺陷,才可得出其溃屈破坏的阈值.
In accordance with the occurrence characteristics and original defect properties for side slope with bedding rock mass,this paper studied the bifurcation behavior and stability behavior for side slope rock mass by using initial post-buckling theory and cusp catastrophic model,which derived its bifurcation equation and the calculation formula of bifurcation load,determined the upper and lower limit of buckling failure in a state of post-buckling,built the criteria for buckling failure of rock mass bedding slope,and presented an application with the example of Bawang mountain slope located the lower reaches of the Yalu River.The results indicate that the critical value at bifurcation point of the side slope with bedding rock mass is determined by its bifurcation set,the stability of the post-buckling equilibrium path and equilibrium configuration for side slope with bedding rock mass can be revealed by using initial post-buckling theory,and the threshold value of buckling failure can be obtained only if considering the actual defect for side slope with bedding rock mass.
作者
陈笑楠
张慧梅
CHEN Xiaonan;ZHANG Huimei(Department of Mechanics,Xi'an University of Science&Technology,Xi'an 710054,China)
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2019年第5期396-401,共6页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金(11172232,51774231)
陕西省重点科技创新团队计划资助项目(2014KCT-30).
关键词
层状边坡
后屈曲
初始缺陷
分岔载荷
分岔方程
稳定性判据
side slope with bedding rock mass
post-buckling
original defect
bifurcation load
bifurcation equation
stability criteria
