Field stress/displacement monitoring and fatigue reliability assessment of retrofitted steel bridge details

2011 ◽  
Vol 18 (1) ◽  
pp. 354-363 ◽  
Author(s):  
Tong Guo ◽  
Yu-Wen Chen
Keyword(s):  
Reliability Assessment ◽  
Steel Bridge ◽  
Fatigue Reliability ◽  
Displacement Monitoring ◽  
Field Stress

scholarly journals Fatigue Reliability Assessment of Orthotropic Bridge Decks under Stochastic Truck Loading

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Yang Liu ◽  
Xinhui Xiao ◽  
Naiwei Lu ◽  
Yang Deng
Keyword(s):  
Bridge Decks ◽  
Volume Growth ◽  
Reliability Assessment ◽  
Element Model ◽  
Traffic Volume ◽  
Traffic Load ◽  
Steel Bridge ◽  
Fatigue Reliability ◽  
Load Model ◽  
Gross Vehicle Weight

A steady traffic growth has posed a threat to the fatigue safety of existing bridges. Uncertainties in traffic flows add to the challenge of an accurate fatigue safety assessment. This article utilizes a stochastic traffic load model to evaluate the fatigue reliability of orthotropic steel bridge decks. The traffic load model is simulated by site-specific weigh-in-motion measurements. A response surface method is presented to solve the time-consuming problem caused by hotspot stress simulations in the finite element model. Applications of the stochastic traffic load model for probabilistic modeling and fatigue reliability assessment are demonstrated in the case study of a steel box-girder bridge. Numerical results indicate that the growth rate of the gross vehicle weight leads to a rapid decrease of the fatigue reliability in comparison to the traffic volume growth. Even though the traffic volume growth is rapid, the control of overloaded trucks in comparison to the traffic volume is an effective way to ensure the fatigue safety of the steel bridges.

FATIGUE RELIABILITY ASSESSMENT OF WELDED JOINTS OF VERY FAST FERRY ACCOUNTING FOR VEHICLE LOADS

2021 ◽  
Vol 153 (A4) ◽  
Author(s):  
Y Garbatov ◽  
C Guedes Soares
Keyword(s):  
Hot Spots ◽  
Reliability Assessment ◽  
Stress Distributions ◽  
Structural System ◽  
Fatigue Reliability ◽  
Welded Steel ◽  
Longitudinal Stiffener ◽  
Hull Structure ◽  
Vehicle Loads ◽  
Wave Induced

This work deals with the fatigue reliability assessment of a welded joint in a longitudinal stiffener of trapezoidal shape in a very fast ferry. Based on the analysis of wave and cargo induced loads the ship hull structure is evaluated. The local structure is represented by a longitudinal stiffener with a trapezoidal transverse section. The critical hot-spots and the stress distributions are defined by FEM. The fatigue damage assessment of considered hot spots is analysed accounting for the combination of wave induced and car-breaking transient loadings. The formulation for the assessment of the welded steel joint is based on the S-N approach and FORM/SORM techniques are applied to evaluate the reliability against fatigue failure accounting for corrosion deterioration. The structural system composed by several hot spots is evaluated as a series system based on second order reliability bounds.

Fatigue reliability assessment of an existing steel railroad bridge

2001 ◽  
Vol 23 (10) ◽  
pp. 1203-1211 ◽  
Author(s):  
Sang-Hyo Kim ◽  
Sang-Woo Lee ◽  
Ho-Seong Mha
Keyword(s):  
Reliability Assessment ◽  
Fatigue Reliability ◽  
Railroad Bridge
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