摘要
为克服传统边坡稳定安全系数存在的缺陷,提出以基于动力与位移耦合的卸加载响应比作为新的稳定安全系数对边坡稳定性进行评价.在分析传统的边坡稳定安全系数内涵及局限性的基础上,运用可靠性分析方法,提出以可靠度表达边坡安全程度的设想.从损伤力学的视角由损伤变量推导求得卸加载响应比参数,通过分析论证了卸加载响应比作为可靠度的一种表达形式,可以定量描述边坡的安全程度.并对卸加载响应比的实际应用及其优越性进行了分析,结果进一步表明卸加载响应比作为一种新的边坡稳定安全系数具有合理性、实用性和有效性.
In order to overcome the shortcomings of the traditional stability safety factor, in this paper, the unload-load response ratio based on coupling of dynamic and displacement is used as the new stability safety factor to evaluate the stability of slope. In view of the connotation and the limitations of the traditional safety factor of slope, the use of the reliability degree to reflect the slope safety degree is proposed by using the reliability analysis method. From the damage mechanics, the parameters of the unload-load response ratio is derived through the damage variable. It is demonstrated that the unload-load response ratio as an expression of reliability can quantitatively characterize the safety degree of slope. The practical application and advantages of the unload-load response ratio are analyzed, the results further show that it is reasonable, practical and effective taking the unload-load response ratio as a new kind of safety factor of slope.
出处
《力学与实践》
北大核心
2016年第3期275-282,共8页
Mechanics in Engineering
基金
国家自然科学基金资助项目(41372297)
关键词
稳定安全系数
卸加载响应比
损伤变量
可靠度
损伤力学
stability safety factor, unload-load response ratio, damage variable, reliability, damage mechanics
