International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 03 | Mar 2024
p-ISSN: 2395-0072
www.irjet.net
COMPARATIVE STUDY OF RECTANGULAR AND TRAPEZOIDAL BOX GIRDER FOR IRC LOADINGS Dr. P. P. Tapkire1, Ms. Prajakta G. Pathak2, Mr. A. S. Chandanshive3 1 H.O.D. Civil Dept., N.B. Navale Sinhgad College of Engineering, Solapur, Maharashtra, India-413255
Civil Dept., N.B. Navale Sinhgad College of Engineering, Solapur, Maharashtra, India-413255 3Lecturer in Solapur Education Society’s Polytechnic Solapur, Maharashtra-413002 ---------------------------------------------------------------------***--------------------------------------------------------------------2Master Of Technology Student in
Abstract - Box girder bridges have emerged as a
basis of the box girder bridge. Any eccentric load will cause high torsional stresses which will be counter acted by the box section. The analysis of such sections are more complicated due combination of flexure, shear, torsion, distortion. It is used for larger spans with wide cross-section. It can be used for spans up to 150m depending upon the construction methods.
prominent choice in contemporary infrastructure projects due to their superior structural properties and versatility in construction. This paper explores the advantages and applications of box girders, highlighting their ability to resist torsion, accommodate heavier loads, and provide enhanced structural stiffness and strength compared to traditional I-beams. Economy and aesthetics play a significant role in the evolution of box girder designs, with features such as cantilevers and inclined webs enhancing both efficiency and visual appeal. Despite the complexity of analysis involving factors like flexure, shear, torsion, and distortion, box girder bridges remain a preferred choice for spans of up to 150 meters, demonstrating their effectiveness in meeting the demands of modern infrastructure development.
1.1 AIM & OBJECTIVE This paper aims to find a suitable cross section for different span to depth ratio with various IRC Loading. ● Analysis and design of various sections of box girder for various IRC Loading. ● Different span to depth ratio for trapezoidal and rectangular section must be analyses and design.
Key Words: IRC loadings, Box girder bridges, Rectangular box girder, Trapezoidal box girder, Torsional resistance.
● Comparative charts are proposed to prepare for different span to depth ratio and for different cross section.
1.INTRODUCTION A box or tubular girder is a girder that forms an enclosed tube with multiple walls, as opposed to an I- or H-beam. Originally constructed of riveted wrought iron, they are now made of rolled or welded steel, aluminum extrusions or prestressed concrete. Compared to an I-beam, the advantage of a box girder is that it better resists torsion. Having multiple vertical webs, it can also carry more load than an I-beam of equal height (although it will use more material than a taller I-beam of equivalent capacity) Box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. Although the box girder bridge is normally a form of beam bridge, box girders may also be used on cable-stayed and other bridges. A box girder is formed when two web plates are joined by a common flange at both the top and bottom. The closed cell which is formed has a much greater torsional stiffness and strength than an open section and it is this feature which is the usual reason for choosing a box girder configuration. The box girder consists of concrete, steel or a combination of both. Most modern elevated structures are built on the
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● Finding effect of span to depth ratio on deformation of Trapezoidal and rectangular cross section girder
1. LITERATURE REVIEW B. Paval [1] This was a Study of a pre-stressed concrete box girder bridge and to describe the linear, non-linear and time history analysis of this concrete spread box girder superstructure when subjected to different loads simulating the effect of traffic. The prestressed concrete box girder bridge superstructure analysed in the base case consists of two concrete box girders with simple span. The superstructure is loaded by IRC loads and the loads are incremented until the bridge superstructure system fails. Pragya Soni, Dr. P.S. Bokare [2] In this Paper The use of box-girders was proven to be a very efficient structural solution for highway bridges and flyovers due to its high tensional rigidity, serviceability, economy, aesthetics, and the ability to efficiently distribute the eccentric vehicular live load among the webs of the box-girder. For the multi-
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