International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 05 | May 2023
p-ISSN: 2395-0072
www.irjet.net
Patch Loading Resistance on Inclined steel Plate Girders with Stiffened Cell Flanges Varsha Unni k.1, Krishna M. M.2 1PG Student APJ Abdul Kalam Technological University,
Universal Engineering College, Vallivattom, Kerala, India 2Assistant Professor APJ Abdul Kalam Technological University,
Department of Civil Engineering, Universal Engineering College, Vallivattom, Kerala, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Stiffening is always an important factor in the case of steel girders. Stiffening with different flanges are more effective
when it comes to increasing the capacity to withstand concentrated loads caused by support reactions in steel bridge girders incrementally launched. Steel box girders are widely used in bridges when heavy loads are acting. During the construction or launching time of steel bridges there will be a concentrated force acting perpendicular to the flange of girders, this concentrated force during erection time of construction is known as patch loading. This patch loading case causes web bulking and premature bridge failure. Box girders with inclined web and their patch loading behaviour is studied. This paper aims at investigating the patch loading resistance on steel girders with different hollow flange shapes. Here it is designed and analysed by using finite element analysis method by ANSYS 2022 R2. The model is deigned with parametric studies and conducted in order to investigate the effect of various geometric parameters such as angle of inclination, web thickness and patch loading length and different patch loading length. The results showed that the use of rectangular hollow shaped cell flanges enhances the resistance of steel plate girders to patch loading. Key Words: Patch loading, Inclined steel girders, Hollow flanges, Finite element analysis, Concentrated load, Triangular cell flange, rectangular cell flange, Trapezoidal cell flange
1.INTRODUCTION Steel bridges are widely used in Highway, Urban and Railway networks around the world. Steel bridges are often made using girders with thin webs with good shear strengths and flexural to cover lengthy spans and to be able to withstand heavy vertical loads during service. This causes premature failure of steel bridges or webs. To prevent buckling related failures and to increase the resistance to concentrated loads the following strategies are employed: (a) to increase the web thickness, (b) to use hollow flanges as stiffener (c) to add adequately spaced vertical or horizontal stiffeners Euro Casanova researched on patch loading resistance of steel plate girders stiffened with triangular cell flanges [1]. NavarroManso [5] developed a steel bridge launching system based on a self-supporting double deck, in which the bottom flanges were stiffened with a triangular cell to withstand the concentrated load reactions in the end supports and connections. Dissertation Balázs kövesdI [6] patch loading resistance of girders with corrugated webs showed corrugation on webs can reduce patch loading. This paper aims at investigating the patch loading resistance of inclined steel plate girders stiffened with cell flanges. to investigate the influence of various geometric parameters such as the angle of inclination, different hollow shapes. Here hollow shapes of rectangle, triangle and trapezoidal shapes are used for the hollow flange cases. The investigation is focused on a locally loaded single panel and thus, other important instability related phenomena are out of the scope of this paper. Patch loading resistance on inclined girders with various hollow flanges and comparison have to be studied other than from straight girders. This paper provides a detailed description of the optimization process, including the methodology used, the results obtained, and their significance. Overall, the project has significant implications for the patch loading and its resistance.
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