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Title: FATIGUE DAMAGE MECHANISM AND ITS APPLICATION BASED ON FULL-SCALE ANALYSIS OF STEEL-CONCRETE COMPOSITE SLAB SUBJECTED TO REPETITION OF TRAFFIC
Authors: OGIYAMA, Yotaro
FUJIYAMA, Chikako
TAKASUKA, Takehiro
Issue Date: Dec-2014
Publisher: Society for Social Management Systems
Journal Title: Society for Social Management Systems Internet Journal
Abstract: The purpose of this study is to analyze the fatigue damage process of a plate girder bridge supporting a steel-concrete composite slab, and to propose a method for maintenance of the composite slab. To analyze a full-scale bridge subjected to heavy traffic, three-dimensional non-linear FE analyses and loading rates based on an actual bridge are used. The full-scale bridge model is a 2-lane road bridge with 30 m span length and 10.55 m width, consisting of main girders with vertical stiffeners, cross beams, and composite slab. All structural elements were modeled as solid elements in order to enable detailed examination of stress distributions, although shear studs throughout the bottom plate were implicitly modeled as interface elements. The initial bond and surface friction between transverse ribs and concrete were taken to be the other types of interface elements. First, a static load was applied to the center of the slab at the mid-span of the bridge. Although slips between transverse ribs and concrete were observed during the static loading process, a rapid decrease of load carrying capacity of the composite slab was not observed. Next, four parallel moving loads, simulating the loads of vehicles, were applied to the slab along the bridge axis. Under high cycle load repetition, development of strains around the ribs was observed. This indicates the characteristic cracking mechanism of concrete in the composite slab. Visualization of analysis enabled the clarification of the fatigue damage mechanism of the composite slab. This study indicates that inspection of this type of composite slab is important for road maintenance.
Type: Conference Paper
URI: http://hdl.handle.net/10173/1260
Appears in Collections:Vol.09

Please use this identifier to cite or link to this item: http://hdl.handle.net/10173/1260

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