摘要
目前有关地震荷载作用下滑坡体上抗滑桩的失效机理还不清晰,对其与震波的响应机制还存在模糊认识,为了有效解析地震波与抗滑桩锚固体系间的相互作用机理,以极限分析的上限定理为工具,在确定坡体潜在滑动面的条件下,从能量角度定义了抗滑桩锚固体系的安全性,研究了地震荷载作用下滑坡锚固体系的能量输入与耗散机制,分析了导致滑坡启动和锚固体系失稳的震波特征,并给出了其临界值的计算模式。最后,通过算例表明震时抗滑桩失效是在特定方向和大小的地震荷载反复作用下损伤间断性累积的结果。
The failure of anti-slide pile in earthquake is one important factor that aggravates the harm of mountain hazards.However,the mechanism of it and its response mechanism to seismic wave are not clear at present,and the interaction mechanism between anchor system and seismic wave can＇t be resoluted.Therefore,based on energy theory,taking the upper bound theorem used in limit analysis as measure,and assuming the sliding face as arc,the safety of anchor system was defined,and then the mechanism of energy input and dissipation under earthquake was studied.Furthermore,the characters seismic wave which induces the damage of anchor system was also analyzed,and the calculating formulas were suggested.At last,an example was given to show that the failure mechanism of anti-slide pile is the result of discontinuous damage accumulation under seismic load with special direction and value.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2009年第3期284-288,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
国家重点基础研究计划资助项目(2008CB425802)
国家自然科学基金资助项目(40872181)
关键词
地震波
抗滑桩失效
上限定理
临界加速度
seismic wave
failure of anti-slide pile
upper bound theorem
critical acceleration
