摘要
针对地震的非平稳性以及顺层边坡结构面力学参数的时变性,提出一种顺层边坡非平稳地震响应及动力可靠度分析方法.首先,运用虚拟激励法及逐步积分法建立顺层边坡动力响应的快速求解方程;根据动力响应计算结果,计算出顺层边坡结构面抗滑力的统计特征值;基于首次穿越破坏准则,建立非平稳地震作用下顺层边坡动力可靠度分析方法.算例分析表明：该顺层边坡非平稳地震响应快速计算方法简便可行,且计算精度较高;动力可靠度分析方法能更真实地反映边坡在地震中的实际安全情况,很好地考虑边坡结构面力学参数的时变性影响.
In view of the non-stationary nature of earthquake and the time variation of mechanical parameters of bedding slope,a non-stationary earthquake response and dynamic reliability analysis method of bedding slope was proposed.Firstly,the dynamic response equation of bedding slope was established by using the pseudo excitation method and the step-by-step integration method.Then,according to the calculation results of response,the statistical characteristics of the anti slide force value was calculated.Based on the first passage failure criterion,the calculation method of reliability for slope dynamic was established.Analysis of example shows that the rapid calculation method is simple and feasible in the calculation of stationary earthquak response with higher precision.The dynamic reliability analysis method can reflect the actual situation in the earthquake safety of the slope,and can well consider the influence of slope mechanical parameter＇s time-varying.
作者
龚文惠
李逸
赵旭东
陈训龙
Gong Wenhui;Li Yi;Zhao Xudong;Chen Xunlong(School of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第10期1-6,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金面上资助项目(51278217)
关键词
顺层边坡
动力可靠度
虚拟激励法
非平稳地震
时变性
首次穿越破坏
bedding slope
dynamic reliability
pseudo excitation method
non-stationary earthquake
time variability
first passage failure
