Reliability-based calibration for a mechanics-based fatigue cracking design procedure

被引:8
|
作者
Dinegdae, Yared H. [1 ]
Birgisson, Bjorn [1 ,2 ]
机构
[1] KTH Royal Inst Technol, Div Soil & Rock Mech, Stockholm, Sweden
[2] Aston Univ, Sch Engn & Appl Sci, Aston Triangle, Birmingham B4 7ET, W Midlands, England
关键词
LRFD; fatigue cracking; pavement design; CCD; response surface; FORM;
D O I
10.1080/14680629.2015.1094397
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Most pavement design procedures incorporate reliability to account for design inputs-associated uncertainty and variability effect on predicted performance. The load and resistance factor design (LRFD) procedure, which delivers economical section while considering design inputs variability separately, has been recognised as an effective tool to incorporate reliability into design procedures. This paper presents a new reliability-based calibration in LRFD format for a mechanics-based fatigue cracking analysis framework. This paper employs a two-component reliability analysis methodology that utilises a central composite design-based response surface approach and a first-order reliability method. The reliability calibration was achieved based on a number of field pavement sections that have well-documented performance history and high-quality field and laboratory data. The effectiveness of the developed LRFD procedure was evaluated by performing pavement designs of various target reliabilities and design conditions. The result shows an excellent agreement between the target and actual reliabilities. Furthermore, it is clear from the results that more design features need to be included in the reliability calibration to minimise the deviation of the actual reliability from the target reliability.
引用
收藏
页码:529 / 546
页数:18
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