岩土力学2018，Vol.39Issue(1)：151-157,7.DOI:10.16285/j.rsm.2016.0107
抗剪强度分项系数的标准差反馈标定法
Calibration of partial factors of shear strength parameters using standard deviation feedback method
摘要
Abstract
Limit state design method based on reliability theory is a trend of modem geotechnical design.Calibration of the partial factors is a key to determine the design strength parameters.Although there are safety factor calibration methods,first order second moment method and designed points method to calibrate the partial factor theoretically,the mechanism of how the partial factors reflect the variance of the geotechnical materials is still unknown.The standard deviation feedback calibration method is then proposed to solve this problem.The core concept of this method is to adjust the mean value of the strength parameters to offset the influence of the standard deviation adjustment.A case study is given to illustrate the method.A comparison between this method and the design points method is taken out to see their different effects on the design strength parameters.The results show that the standard deviation feedback calibration method is more reasonable and the design points method will lead to a conservative design which would raise the budget ultimately.关键词
分项系数/标准差反馈标定法/一阶可靠指标法Key words
partial factor/standard deviation feedback calibration/first order reliability method分类
建筑与水利引用本文复制引用
朱勇,冯夏庭,周辉,张传庆,张铭强..抗剪强度分项系数的标准差反馈标定法[J].岩土力学,2018,39(1):151-157,7.基金项目
国家重点基础研究发展计划(973计划)(No.2014CB046902) （973计划）
国家自然科学基金项目(No.51279201).This work was supported by the National Program on Key Basic Research Project of China (973 Program) (2014CB046902) and the National Natural Science Foundation of China (51279201). （No.51279201）
