Fatigue design and retrofit of steel bridges

Abstract

This review examines recent work that has been conducted on the fatigue design, inspection and evaluation of steel bridges. Research studies to evaluate load histories and the influence of cyclic loads on fatigue critical details are discussed for both railway and highway bridge structures. Applications of conventional nondestructive testing and inspection methods are reviewed, and new developments in nondestructive evaluation are discussed. Retrofit and repair procedures that have been used for several different structural details are described. A summary of the fatigue strength and performance of several secondary structural bridge elements is presented. Finally, fatigue assessment procedures which have been proposed recently to design and evaluate new and existing bridge structures are presented.

Predicting fatigue life of shear connectors in steel‐concrete composite bridges using artificial intelligence techniques

“…The equation for the upper bond of data is given by Equation (15). y ¼ 550:66 x À0:544 ð15Þ R 2 ¼ 0:689…”

“…Many studies have worked on other shear connectors such as rubber-sleeve shear connectors, 10 perfobond rib shear connectors, 11 channel shear connectors, angle shear connectors, Y-type perfobond rib shear connectors, 12 perforated shear connectors, 13 blind bolt shear connectors, 9 and adhesive anchor shear connectors, to name a few. 14,15 Load tests were conducted to verify composite action at the steel-concrete interface after the retrofit and compared the structural behavior of the bridge before and after the retrofit. Many older steel bridges have noncomposite steel girders.…”

“…Many studies have worked on other shear connectors such as rubber‐sleeve shear connectors, 10 perfobond rib shear connectors, 11 channel shear connectors, angle shear connectors, Y‐type perfobond rib shear connectors, 12 perforated shear connectors, 13 blind bolt shear connectors, 9 and adhesive anchor shear connectors, to name a few 14,15 …”

Fatigue Life Prediction of S235 Details Based on Dislocation Density

“…Fatigue problems in structural elements are not easily understandable once several parameters, which are not always independent, command the structural response to cyclic loading. Therefore, empirical procedures are commonly used to define and model fatigue response [1]. Experimental campaigns are usually performed to overcome this problem and establish a reliable prediction of the fatigue life.…”

Impact of train-induced vibration on railway cable-stayed bridges fatigue evaluation

“…Fatigue damage (Committee 1982;Fisher 1984) on weld details of some older bridges was discovered in the past and it is recognized as a common structural problem worldwide (Kossakowski 2013). Due to the increased level of train axle loads and repetitive nature of the train loading pattern, fatigue on railroad steel bridges (Fisher, Roy 2011;Zhao et al 1994) has also attracted special attention in structural research (Bowman 1997). Traditionally, fatigue analysis (Bush 1988) of a bridge has been conducted using the method of moving loads and influence line, in which the train axle loads are treated as series of static loads moving along the span of the bridge.…”