Parameters of Pre-Stressed Box Girder Bridge under Different Radius of Curvature
Dr Rajan Suwal , Deepika Sharma
This research, it is primarily intended to assess parametric study of pre-stressed Box-Girder bridges. Radius of Curvature was varied in 50m span bridge in horizontal direction only. All the models are subjected to self-weight and moving load of IRC class 70R vehicle . For this research, a three dimensional finite element (FE) model of two lane simply supported Box Girder Bridge made up of pre-stressed concrete has been developed using commercial software SAP 2000 version 14.0. Modal analysis has been carried out to obtain the mode shapes and various vibration properties such as fundamental time period and frequencies. For acceleration time history analysis Gorkha Earthquake has been used. From modal analysis the longitudinal stress at top and bottom of cross sections, bending moment, torsion, deflection and fundamental frequency are calculated. The responses of a curved bridges in comparison straight bridge are recorded. The ratio of responses is represented by a parameter. From the responses linear equation has been generated for torsion, bending moment, and deflection. Increase in Bending Moment, Torsion, deflection and stresses due to curvature can be represented by multiplication factor, ratio of maximum response of curved bridge to that of straight bridge from moving load analysis, within reasonable accuracy which can be used in preliminary design.
Pre-stressed Box Girder Bridge, varying radius of curvature, FE model in SAP, simply supported, modal analysis, parametric study
 Cagri Ozgur (2007) "Behavior and Analysis of a Horizontally Curved and Skewed I-girder bridge" for MSc, School of Civil and Environmental Engineering
 Chu, K. J, and Pinjarkar, S. G. (1971) "Analysis of Horizontally Curved Box-Girder Bridges" Journal of the Structural Division ASCE 97(10), 2481–2501
 IRC: 6-2000, Standard Specifications and Code of Practice for Road Bridges, Section II, Loads and Stresses, The Indian Roads Congress, 2000.
 Martin Alenius (2003) "Finite Element Modelling of Composite Bridge Stability" MSc. Thesis , Department of Mechanics., Royale Institute of Technology.
 Subjected to Earthquake Loading" Journal of Civil Engineering and Architecture, Volume 6, No. 11
 P.K. Gupta, K K Singh and A. Mishra, (2010) "Parametric study on behavior of box-girder bridges using finite element method" Asian journal of civil engineering (building and housing) vol. 11,Pages-135-148.
 SAP2000, Integrated Software for Structural Analysis and Design
 Zakia Begum, (2010) "Analysis and behavior investigations of box girder bridges." MSc. Graduate School of Maryland.
[Dr Rajan Suwal , Deepika Sharma (2020) Parameters of Pre-Stressed Box Girder Bridge under Different Radius of Curvature IJIREM Vol-7 Issue-5 Page No-63-67] (ISSN 2350 - 0557). www.ijirem.org
Dr Rajan Suwal
Department of Civil Engineering,
Institute of Engineering, Pulchowk Campus, Lalitpur, Nepal