交通荷载下岩坡疲劳劣化及其服役寿命研究  

Research on Fatigue Deterioration and Service Life of Rock Slope under Traffic Loading

作　　者：简文彬[1,2,3] 樊秀峰[1,2,3] 彭军[1,2] 李润[1,2] 

机构地区：[1]福州大学岩土工程与工程地质研究所,福建福州350108 [2]福州大学资源与城乡建设系,福建福州350108 [3]福建省地质灾害重点实验室,福建福州350002

出　　处：《水利与建筑工程学报》2014年第1期1-5,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金(41072232);福建省自然科学基金(2010J01254)

摘　　要：基于坡体材料的疲劳试验与边坡结构应力分析,采用S-N曲线与Miner疲劳累积损伤准则进行交通动荷载下边坡疲劳寿命的估计,提出边坡疲劳稳定性分析方法,建立"岩土参数-安全系数-疲劳寿命"关系。研究结果表明,边坡岩土参数与安全系数随着疲劳荷载循环作用而逐渐下降,边坡疲劳寿命的消耗对于岩土参数和安全系数的影响具有初期不敏感,后期敏感度迅速加剧的特征,该特征反映了疲劳破坏的突然性。提出的疲劳安全因子可用来实现边坡工程抗疲劳耐久性设计的量化,实现稳定性与疲劳寿命两方面控制边坡工程的安全性与耐久性。Based on the material tests and structural stress analysis of slope ,the S-N curve and Miner cumulative fatigue damage rule are used to estimate the fatigue life of the slope under long-term repeated traffic loading ,and the fatigue sta-bility analysis method of slope is put forward ,then the relationship among the geotechnical parameters ,safety factor and fatigue life is established .The results show that the slope’s geotechnical parameters and safety factor would be gradually decreased with fatigue load consumption ,and the effect of the fatigue life consumption on the geotechnical parameters and safety factor is unsensitive firstly and then its sensitivity is increased rapidly ,which could reflect the suddenness of fa-tigue damages .The fatigue safety factor could be used in the quantitative design of slope durability so as to control the slope’s safety and durability under traffic loading .

关 键 词：交通荷载 岩质边坡 疲劳寿命 边坡耐久性 

分 类 号：TU457[建筑科学—岩土工程]