Title: Temperature analysis of segmental box girder bridges
Authors: C.S. Mathew; R.K. Ingle
Addresses: Department of Applied Mechanics, Visvesvaraya National Institute of Technology Nagpur, Nagpur, 440010, India ' Department of Applied Mechanics, Visvesvaraya National Institute of Technology Nagpur, Nagpur, 440010, India
Abstract: Uniform temperature causes axial stresses and temperature gradient causes bending stresses on the structure. Therefore, to study the effect of temperature, two different parametric studies are conducted. Number of spans in the bridge is varied in the former and the span is varied in the latter. The segmental bridge is modelled in finite element software and temperature loads are applied according to IRC 6 (2016). The results obtained from finite element analysis are compared and validated with the conventional method for simple case. Effect of uniform temperature changes in segmental bridges is found to be negligible. But, temperature gradient causes significant moments and stresses; thus is found to be the governing temperature for the analysis and design of segmental bridges. It is also observed that, as span increases, the maximum values of bending moments and shear forces due to positive temperature gradient and negative temperature gradient decreases.
Keywords: bending moment; box girder; cross section; deformation; modelling; negative gradient; positive gradient; segmental bridges; shear force; stress; temperature.
International Journal of Structural Engineering, 2018 Vol.9 No.4, pp.289 - 301
Received: 14 Apr 2018
Accepted: 27 Jul 2018
Published online: 04 Apr 2019 *