Zewdu, Yigrem (2013) Seismic Assessment of Simply Supported Vs Continuous Concrete Girder Bridges (Case Study of Selected Bridges). Masters thesis, Addis Ababa University.
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Abstract
Seismic evaluations of typical concrete girder bridges are conducted for two existing simply supported bridges, which are common to the Ethiopian highway construction, and for their counterpart continuous girder bridges. These evaluations are performed for an approximate hazard level of 0.1g ground acceleration by performing linear modal response spectrum analyses on three-dimensional analytical models. The results show responses in the deck girder, reinforced concrete columns and bearings at the supports of the girders. In general, the longitudinal loading of the continuous bridges results in larger demands than the transverse loading. Consequently, the continuous nature of the deck tends to transfer seismic demand to different structural components. Therefore, the demands of piers for continuous girder bridges become larger. The simply supported bridges sustain bearing deformations in the transverse direction which are of the same value as the longitudinal response. These results suggest that both longitudinal and transverse loading are significant and should be considered when performing seismic assessment of these bridges. And also the modal response spectrum analysis result shows that the contribution of higher modes in seismic response of the continuous bridges is insignificant. Whereas it is noted that, the contributing higher modes should be considered to obtain the seismic responses of simply supported girder bridges.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Civil Engineering |
| Subjects: | T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TG Bridge engineering |
| Divisions: | Africana |
| Depositing User: | Andriamparany Edilbert RANOARIVONY |
| Date Deposited: | 04 Jul 2018 13:07 |
| Last Modified: | 04 Jul 2018 13:07 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/6629 |
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