NOVATEUR PUBLICATIONS International Journal of Research Publications in Engineering and Technology [IJRPET] ISSN: 2454-7875 VOLUME 3, ISSUE 9, Sep. -2017
STUDY OF BRIDGE DECK A REVIEW MISS. KSHITIJA S. BALWAN Post-graduation student, Department of civil engineering Sanjay Ghodawt Group of institution, balwankshitija1008@gmail.com MR. V. G. KHURD Asst. professor, Department of civil Engg., SGI College of institute, khurd.vg@sginstitute.in MR. S. S. CHOUGULE Asst. Professor, Department of civil Engg. SITCOE, Yadrev ABSTRACT: directions of the plate within the plane. When a load is The objective of this study was to understand applied on part of a slab, the slab deflects like a ‘dish’ the meaning of bridge deck. To know the different causing of two-dimensional system of moments and forms of decks used in bridge design. To understand torsions which transfer the load and share to the different methods used for analysis of deck and study neighboring parts of the deck which are less severely of box girder and its evolution loaded. KEYWORDS: Bridge deck, box girder. BEAM AND SLAB TYPE DECKS: I. INTRODUCTION: A beam-and-slab deck consists of a number of Bridge decks are developing today as fast as they various longitudinal beams connected to the across their have at any time since the beginning of the construction tops by a thin continuous structural slabs. For transfer of revolution. Methods of analysis of bridge decks have been the load in longitudinally to the supports. The slab acts as developed and in the last thirty years progress has been in concerts with the beams as their top flanges. At the same particularly significant. Hand methods of load distribution time, the greater deflection for the most heavily loaded and more recently the application of digital computers beams bends in to the slab transversely so that it transfers have enabled engineers to analyze decks with complex the loads and shares out the load to the neighboring cross sections and complicated skew, curved beams. Sometimes this transverse distribution of load is and continuous spans. calculated by a number of transverse diaphragms at points along the spans of bridge deck, so that deck behavior is II. LITERATURE: more similar to that of a grid deck. A. FORMS OF BRIDGE DECK: [2]The structural forms of bridge decks are usually CELLULAR DECKS: divided into following five types: The cross-section of a cellular decks or box girder deck is made up of a number of thin cellular slabs and thin or BEAM DECKS: thick webs which totally enclose a number of cells. These A bridge deck behave as a beam and its length complicated structural forms are increasingly used in exceeds than its width by such an amount that when loads preference to beam and slab type of bridge decks for spans are applied on it to bend and twist along its length, the in greater than of 30m because of in the addition of the low cross-sections of deck or shape of deck do not change. material content. For the low weight and high longitudinal bending stiffness they have high torsional stiffnesses for GRID DECKS: which give them better stability and load distribution The structural member of a grid deck it is have a characteristics. grid of two or more longitudinal beams with transverse beams supporting the running slab. Loads are distributed B. METHODS OF BRIDGE DECK ANALYSIS: between the main longitudinal beams by the bending and [2]From various research on behavior of bridge decks twisting of the transverse beams. Because of the analysis under loading had been carried out over the past workmanship needed to fabricate the transverse beams, so five decades and various methods of bridge deck analysis this method of construction is becoming less popular and it were evolved from time to time. Prior to the general use of can be replaced by slab and beam-and-slab with have no the computer-aided analysis, hand computation methods transverse diaphragms. and charts based on some approximations and idealizations, provided convenient methods of load SLAB DECKS: distribution. These were reasonably accurate for design A deck slab behaves like a flat plate which is purposes. However, with the computers, many computercontinuous for the transfer of moments and torsions in all aided methods have been developed and are in use 23 | P a g e