Response of Double Cell Mono Symmetric Box Girder Structure to Torsional-Distortional Deformations
N. N. Osadebe1, C. A. Chidolue2
1N. N. Osadebe, Dept of Civil Engineering, University of Nigeria, Nsukka, Nigeria.
2C.A. Chidolue, Dept of Civil Engineering, Nnamdi Azikiwe University, Awka, Anambra, Nigeria.
Manuscript received on March 02, 2012. | Revised Manuscript received on March 31, 2012. | Manuscript published on April 30, 2012. | PP: 285-292 | Volume-1 Issue-4, April 2012 | Retrieval Number: D0360041412/2012©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this paper the effect of middle web member on torsional-distortional deformations of a double cell mono symmetric box girder structure is examined. First, the torsional and distortional deformations of a single cell mono symmetric box girder structure were examined using a single span, simply supported bridge structure on the bases of Vlasov’s theory. By introducing a middle (vertical) web member on the single cell mono symmetric box girder section a double cell mono symmetric box girder structure of the same overall cross sectional dimensions was obtained. The torsional and distortional deformations of the double cell cross sectional profile were also evaluated and compared with those of the mono symmetric cross sectional profile. Results show that the introduction of the middle web member to obtain the double cell mono symmetric box girder structure reduced the distortional deformation by 118% and increased the torsional deformation by 14%
Keywords: box girder, distortion, mono symmetric, thin-walled, torsion, Vlasov’s theory.