3rd International Conference on Civil Engineering: Development & Sustainability
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A review on the Influence of Expansion Joint Design on the Seismic performance of Curved Bridges
Oral Presentation XML
Volume Title: 3rd International Conference on Civil Engineering: Development & Sustainability
Authors
1Department of Civil Engineering, Faculty of Engineering, Al-Azhar University, Qena, Egypt
2Civil Engineering, Assiut Uni
3Department of Civil Engineering, Faculty of Engineering, Assiut University
4Civil Engineering
Abstract
Horizontally curved bridges have more complex seismic behavior than straight bridges and have been more vulnerable to earthquakes. In these bridges, coupling of translational motions and in-plane rotation will dominate their seismic response. In long, multiple-span, reinforced concrete bridge structures, the design of the expansion joints and the long columns has a profound influence on the structural integrity of the system under dynamic loading, and, because of the nonlinear discontinuous behavior of the deck, the dynamic characteristics are very complex. Horizontally curved bridges due to structural irregularities and its rigid torsional motions of the deck cause deck to be unseating and pounding in the expansion joints and as a result, suffer severe damage in earthquakes. The seismic pounding between girder and girder or bridge and abutment at the expansion joint locations could result in unfavorable seismic performance of in-plane rotation amplification and hence global displacement demands. The aim of the paper is to investigate the effectiveness of existing bridge design methodology in providing adequate structural resistance to seismic excitation. The severe damage at the expansion joints during strong excitation is outlined, and ways of reducing such damage are suggested. special attention is paid to the detailed design of the deck in the expansion joint location. A parameter study of expansion joint design will be undertaken. Models incorporating hinge restrainers of various strength and expansion joints with collapsible sacrificial buffers will be tested.
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