摘要
概率极限状态法较为全面地考虑了影响结构安全度等因素的客观变异性,比容许应力法更合理,但新颁布的《铁路桥涵极限状态法设计暂行规范》中各系数、参数的取值并未经过实践检验。为了进一步修订、完善极限状态法规范以满足实际工程的需要,以三种形式的简支T梁为工程背景分别进行试设计和同精度比较分析。分析结果表明:暂行极限状态法规范的可靠度级别低于现行容许应力法,而两者在正截面抗裂性方面的可靠度水平是相当的。
Limit state method,which is more reasonable than allowable stresses method,has generally considered the objectivity and variability of factors influencing structure＇s safety. But in the newly-launched Interim Code for Limit State Design of Railway Bridge and Culvert,coefficients and parameters have not been verified by practice. For the sake of consummating and modifying the limit state design code to satisfy the needs of actual projects,trial design and same-precision compare analysis have been carried out with the background of three types of simple supported T shaped girder. Analysis result indicates that the interim limit state design code＇s reliability level is lower than that of the current allowable stresses method,and the allowable stresses method is more conservative,but their reliability level on normal section crack resistance is comparable.
出处
《河南城建学院学报》
CAS
2016年第6期21-25,共5页
Journal of Henan University of Urban Construction
基金
铁道部科技开发计划项目(2010G001-C)
关键词
桥梁工程
简支T梁
极限状态法
容许应力法
可靠度
bridge engineering
simple supported girder
limit state method
allowable stresses method
reliability
