长江科学院院报2018，Vol.35Issue(1)：112-116,5.DOI:10.11988/ckyyb.20160959
考虑劣化效应的三峡库区某岸坡抗震性能分析
Seismic Behavior of a Typical Bank Slope of Three Gorges Reservoir in Consideration of Degradation of Rock Mass Mechanical Properties
摘要
Abstract
After water impoundment in the Three Gorges Reservoir,the physical and mechanical properties of bank slope rock mass have inevitablely deteriorated under the influence of many factors such as dramatic water level fluctuation,rainfall,and low strength earthquake of high frequency,which directly affects the deformation stability of reservoir bank slope.In view of this,we analyzed and assessed the seismic behavior of a typical reservoir bank slope of Three Gorges Reservoir in consideration of the degradation of rock mass shear strength parameters.Results show that for the studied bank slope,1) under different characteristic water levels,the global safety factor of slope increased slightly as water level raised,but reduced apparently as earthquake acceleration increased;2) at all levels of earthquake action,the anti-seismic capacity of bank slope gradually reduced in the presence of degradation of shear strength parameters,with possible local instability in the mid-lower part of slope accumulation body;and as water level raised,the trailing edge of unstable region gradually raised.The research ideas and achievements offer reference for the stability evaluation and reinforcement of reservoir bank slope.关键词
三峡库区/库岸边坡/水库地震/参数劣化/抗震性能Key words
Three Gorges Reservoir/reservoir bank slope/reservoir earthquake/degradation of parameters/seismic behavior分类
天文与地球科学引用本文复制引用
王晨玺杰,邓华锋,张恒宾,方景成,肖瑶..考虑劣化效应的三峡库区某岸坡抗震性能分析[J].长江科学院院报,2018,35(1):112-116,5.基金项目
国家自然科学基金项目(51679127) （51679127）
国家自然科学基金重点项目(51439003) （51439003）
湖北省自然科学基金重点项目(2015CFA140) （2015CFA140）
水利部公益性行业科研专项经费项目(201401029) （201401029）
