首页 | 期刊介绍 | 编委会 | 道德声明 | 投稿指南 | 常用下载 | 过刊浏览 | In English
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 83次   下载   
分享到: 微信 更多
考虑软土蠕变对强度影响的高桩码头岸坡时变可靠度分析
王元战, 戈浩波, 吴林键
天津大学 水利工程仿真与安全国家重点实验室
摘要:
港口工程中,高桩码头岸坡的稳定性问题一直以来都是工程设计中的重点。在码头长期使用过程中,岸坡土体的长期蠕变会导致其抗剪强度参数随时间而不断地衰减。本文考虑软土蠕变导致的土体抗剪强度的衰减效应,建立了软土长期强度模型,用以量化由于土体蠕变导致的土体抗剪强度参数随时间的变化规律。将时变可靠度理论结合有限元强度折减法,提出了考虑软土蠕变对强度影响的高桩码头岸坡时变可靠度算法。采用拉丁超立方抽样方法来改进传统蒙特卡罗法的随机抽样过程,提高计算效率。针对某一岸坡实例,将采用本文算法计算得到的可靠度结果与其他算法评估的结果进行对比分析,验证本文算法的可靠性。最后以我国沿海某高桩码头岸坡为例,基于本文算法评估了该码头岸坡的时变可靠度,分析了岸坡稳定性的时变规律。
关键词:  码头岸坡  时变可靠度  长期强度  拉丁超立方抽样  有限元
DOI:10.11759/hykx20171218001
分类号:U657
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
Time-variant reliability analysis of bank slope of open type wharf on piles considering the effect of soft soil creep on strength
WANG Yuan-zhan, GE Hao-bo, WU Lin-jian
National Key Laboratory of Water Conservancy Engineering Simulation and Security,Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Tianjin University,Tianjin,300072 China
Abstract:
The stability of slope of open type wharf on piles has always been the focus of design in the port engineering. During long-term use of the wharf, long-term creep of bank soil causes its shear strength parameters to decay over time. In this paper, the decay effect of soil shear strength caused by creep of soft soil is considered, and a long-term strength model of soft soil is established to quantify the variation of shear strength parameters of soil due to soil creep with time. Combining the theory of time-variant reliability with the strength reduction method of finite element method, a time- variant reliability method is proposed to consider the effect of soft soil creep on strength. The Latin hypercube sampling method is used to improve the random sampling process of traditional Monte Carlo method and improve calculation efficiency. For a bank slope example, the reliability based on the proposed algorithm is compared with the results of other algorithms to verify the reliability of the proposed algorithm. Finally, taking the slope of open type wharf on piles in the coastal area of China as an example, the time-variant reliability of the wharf slope is evaluated based on this algorithm, and the time- variant regularity of the slope stability is analyzed.
Key words:  slope of open type wharf on piles  Time-variant reliability  Long-term strength  Latin hypercube sampling  finite element
版权所有 《海洋科学》编辑部 Copyright©2008 All Rights Reserved
主管单位:中国科学院 主办单位:中国科学院海洋研究所
地址:青岛市南海路七号  邮编:266071  电话:0532-82898755  E-mail:bjb@qdio.ac.cn
技术支持:北京勤云科技发展有限公司