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INTERNATIONAL JOURNAL OF CIVIL AND STRUCTURAL ENGINEERING Volume 1, No 3, 2010

Copyright 2010 All rights reserved Integrated Publishing services

Research article

ISSN 0976

4399

Analysis and Design of Underpass RCC Bridge Mohankar.R.H1, Ronghe.G.N 1­ Lecturer, Civil Engineering Dept., G.H Raisoni College of Engineering, Nagpur, India. 2­ Professor, Applied Mechanics Dept., Visvesvaraya National Institute of Technology, Nagpur, India roshanmohankar@gmail.com 2

ABSTRACT

The Underpass RCC Bridge is very rarely adopted in bridge construction but recently the Underpass RCC Bridge is being used for traffic movement. In this paper, the analysis of the underpass RCC bridge is carried out. The analysis of this underpass RCC bridge is done by considering fixed end condition. Finite Element Method (FEM) analysis is performed and results are presented. Comparison of different forces between 2D and 3D models for fixed end condition is provided. In this study we show a 2D model can be effectively used for analysis purpose for all the loading condition mentioned in IRC: 6,

Standard Specifications and Code of Practice Road Bridges

The Indian

Congress and Directorate of bridges & structures (2004), Code of practice

for

the

Roads design

of substructures and foundations of bridges

ndian Railway Standard.

Keywords: RCC Underpass bridge, FEM analysis.

1. Introduction

The Underpass RCC Bridge is very rarely adopted in bridge construction but recently the Underpass RCC Bridge is being used for traffic movement. This underpass RCC bridge is pushed inside the embankment by means of hydraulic jack system Since the availability of land in the city is less, such type of bridge utilizes less space for its construction. Hence constructing Underpass Bridge is a better option where there is a constraint of space or land. Detailed analysis and design of underpass RCC bridge has not been carried out till date. Ronghe G. N. and Gatfane Y. M (2004­2005) have worked on the analysis and design of 2D underpass RCC bridge model. In this paper 2D along with 3D analysis of underpass RCC bridge is carried out considering six different loading conditions and eight different loading combinations which are considering from IRC: 6­2000, Standard Specifications And Code Of Practice Road Bridges The Indian Roads Congress and Directorate of bridges & structures (2004), Code of practice for the design of substructures and foundations of bridges Indian Railway Standard. The end condition is considered to be fixed for both 2D and 3D underpass RCC bridge model.

1.1 Modeling of system

For the study of Underpass RCC bridge, earth pressure acting on side walls of underpass RCC bridge because structure embedded as well as vertical loading due to imposed load

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