Abstract: Horizontally curved bridges are important in modern highway systems and those are the most viable option at complicated interchanges or river crossings where geometric restrictions and constraints of limited site space make extremely complicated the adoption of standard straight superstructures. It has been observed that in past earthquakes, most of the damages of the bridges occurred due to the failure of the bearings and substructure. Selection of isolation bearings for a curved bridge is a demanding task because of the complexity involved in curved bridges than straight bridges. In the present study, the responses of an isolated curved continuous bridge for seismic loading conditions are determined. Two types of isolation bearings viz. one elastomer-based bearing and other friction-based bearing have been considered and the efficacy of both has been investigated.

• Publication Date: 25-May-2014
• DOI: 10.15224/978-1-63248-028-6-03-90
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Abstract: It involves the fatigue behavior of K-Joint made of HSLA material using numerical analysis. Use of High Strength Steel instead of using normal grade steel makes the structure lighter and increases the strengths. The fatigue crack growth initiation is always observes at the chord crown toe location irrespective of the stress whether compressive or tensile. Stress distribution plays an important role in the geometry of K-Joint under fatigue stress. As observed, location around the weld has the highest hotspot stress are highest still chord crown toe are at most critical fatigue risk, hence stress investigation have to be performed. The stress in the region surrounding the weld is computed using numerical simulation and the component with the highest residual stresses are discussed.

• Publication Date: 25-May-2014
• DOI: 10.15224/978-1-63248-028-6-03-91
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