地震工程学报2016，Vol.38Issue(6)：916-921,6.DOI:10.3969/j.issn.1000-0844.2016.06.0916
危岩体在地震作用过程中的失稳模式及稳定性评价
Failure Mode and Stability Evaluation of Unstable Rock during Earthquakes
摘要
Abstract
During seismicity,seismic acceleration first increases then decreases.Using a pseudo-static method and considering the acceleration change during earthquakes,sliding and toppling failure modes were calculated for the unstable rock on Tianlong mountain,Taiyuan city,Shanxi province.We found that the failure mode transformed from sliding to toppling under seismic action.Extending this problem to a general situation,we conclude that:the contribution of seis-mic forces to unstable rock damage differs and the overturning moment is relatively larger than the sliding force;for stability evaluation,the seismic action process must be considered,and the failure mode of unstable rock whose safety factor first reaches 1.0 should be used to calculate the possible mode;to ensure the stability of unstable rock of different risk states under seismic action,the seismic strengthening design should consider different possible failure modes.关键词
拟静力法/地震作用过程/危岩体/破坏模式/稳定性Key words
pseudo-static method/seismic process/unstable rock/failure mode/stability分类
建筑与水利引用本文复制引用
彭宁波,孙博,王逢睿,夏江涛..危岩体在地震作用过程中的失稳模式及稳定性评价[J].地震工程学报,2016,38(6):916-921,6.基金项目
甘肃省科技厅科技支撑计划课题(1304FKCA119) （1304FKCA119）
