摘要
为了研究地震作用对路堤边坡滑动距离的影响,通过应用物质点法、谱表达法及随机函数思想,开展随机地面运动下路堤边坡滑动距离的概率分析。首先,通过模拟中国台湾九份二山(Chiu-fen-erh-shan)滑坡验证了改进的物质点法程序的有效性;然后,基于广义Clough-Penzien功率谱模型和随机函数思想生成了445条随机地震加速度样本;最后,研究了随机地震作用下峰值地面加速度对路堤边坡滑动距离的影响规律。结果表明:随着峰值地面加速度的增加,滑动距离变化范围不断扩大,地震动的随机性越来越明显;滑动距离逐渐增大,边坡安全程度降低。
To investigate the effect of seismic action on the sliding distance of embankment slopes,probability analysis of the sliding distance under random ground motions was carried out using the material point method,the spectral expression method and the idea of random functions.Firstly,the effectiveness of the improved procedure of the material point method was verified by simulating the Chiu-fen-erh-shan landslide in Taiwan Province,China.Then,445 random seismic acceleration samples were generated based on the generalized Clough-Penzien power spectrum model and the random function idea.Finally,the influence law of peak ground acceleration on the sliding distance of embankment slopes under the action of random earthquakes was investigated.The results show that with the increase of peak ground acceleration,the range of sliding distance variation widens and the randomness of the earthquake becomes more and more prominent.Moreover,the sliding distance gradually increases and the degree of slope safety decreases.
作者
宰德志
庞锐
刘俊
ZAI De-zhi;PANG Rui;LIU Jun(School of Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《科学技术与工程》
北大核心
2023年第17期7478-7484,共7页
Science Technology and Engineering
基金
国家自然科学基金(52279096,52279125,52009017)
国家重点研发计划(2021YFB2601102)。
关键词
物质点法
随机地震作用
边坡滑动距离
概率分析
material point method
stochastic seismic action
sliding distance of slopes
probabilistic analysis
作者简介
第一作者:宰德志(1996-),男,汉族,山东德州人,博士研究生。研究方向:边坡大变形分析。E-mail:zaidezhi@163.com;通信作者:庞锐(1991-),男,汉族,河南商丘人,博士,副教授。研究方向:岩土数值分析及安全风险评估。E-mail:pangrui@dlut.edu.cn。
