Authors : Qassim Yahyea Hamood and Ali Laftah Abaas
Abstract: Fatigue of the structural elements that fail due to the cumulative damaged by the connected between the microscopic interior cracks represents the main problem of structure such as bridges. The source of fatigue in bridges is amplitude dynamic loading from vehicles during the service life of the bridge that cause fatigue. Composite bridge is the one of different types of bridges that may contain steel girder connected with deck concrete slab by means of shear connectors to transferee the trucks and other loadings to the steel girders. Due to varied amplitude of velocity ranges during the life of the bridge that caused damaged structure on the bridge such as increased in deflections and stresses. In present study, ALSABTEA composite bridge in Diyala, Iraq that designed and constructed to work as full interaction is analyzed under the effects of repeated loading based on loadings codes specifications such as AASHTO using finite elements approach by ANSYS packages. The parameters taking into account are truck loading and velocity speed as low, medium and high. The analysis results indicated that the damage index D for load cases not reach to unity but the maximum value is <0.2% in case of HS20 loading.
Qassim Yahyea Hamood and Ali Laftah Abaas, 2019. Fatigue Assessment of ALSABTEA Bridge under Dynamic Loads. Journal of Engineering and Applied Sciences, 14: 8196-8207.