Systematic derivation of safety factors for the fatigue design of steel bridges

被引：9

作者：

Maljaars, Johan ^{[1
,2
]}

Leonetti, Davide ^{[1
]}

Hashemi, Bahman ^{[1
]}

Snijder, H. H. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Groene Loper 3, NL-5612 AE Eindhoven, Netherlands

[2] TNO, Stieltjesweg 1, NL-2628 CK Delft, Netherlands

来源：

STRUCTURAL SAFETY | 2022年 / 97卷

关键词：

Fatigue safety factor; Bridges; Model uncertainty; Dynamic amplification; Weigh in motion; Random fatigue limit model; Visual inspection; Partial safety factor; IN-MOTION SYSTEMS; S-N CURVES; RELIABILITY-ANALYSIS; PROBABILISTIC FATIGUE; LIFE PREDICTION; WELDED-JOINTS; CALIBRATION; FAILURE; MODEL; CLASSIFICATION;

D O I：

10.1016/j.strusafe.2022.102229

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents a probabilistic framework to derive the safety factors for fatigue of steel and composite steel concrete road bridges. Engineering models are used for the design and the safety factor is derived in such a way that the design meets the target reliability set by international Eurocode and ISO standards, estimated using measured data and advanced probabilistic models. Engineering model uncertainties and dynamic amplification factors are established through comparison of measurements and models. The value of visual inspections is quantified based on observations from practice and expert opinions. The safety factors are derived for Eurocode's Fatigue Load Model 4 and Eurocode's tri-linear S-N curve. The study shows that the safety factors for fatigue as currently recommended by the Eurocodes need to be raised.

引用

页数：16

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