Cost Optimization of R.C.C. T-Beam Girder
Rajesh F. Kale1, N. G. Gore2, P. J. Salunke3
1Mr.Rajesh F. Kale, (M.E. student) Civil Engg. Dept., M.G.M’s. College of Engineering & Tech., Kamothe, Navi Mumbai, India Prof.
2N. G. Gore, (Guide) Civil Engg. Dept., M.G.M’s. College of Engineering & Tech., Kamothe, Navi Mumbai, India Prof.
3P. J. Salunke, (Guide) Civil Engg. Dept., M.G.M’s. College of Engineering & Tech., Kamothe, Navi Mumbai, India
Manuscript received on December 08, 2014. | Revised Manuscript received on December 15, 2014. | Manuscript published on January 05, 2014. | PP: 184-187 | Volume-3 Issue-6, January 2014. | Retrieval Number: F2042013614/2014©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this present study, cost optimization approach of R.C.C. T-beam girder is presented. The main objective function is to minimize the total cost in the design process of the bridge system considering the cost of materials. The cost of each structural element covers that of material and labor cost for reinforcement, concrete and formwork. For a particular girder span and bridge width, the design variables considered for the cost minimization of the bridge system, are deck slab depth, width of web of girder and, girder depth, (i.e. X1, X2, X3 resp.) Design constraints for the optimization are considered according to IRC-21:2000 (Indian road congress) Standard Specifications. The optimization process is done for different grade of concrete and steel. The comparative results for different grade of concrete and steel is presented in tabulated form. The optimization problem is characterized by having a combination of continuous, discrete and integer sets of design variables. The structure is modeled and analyzed using the direct design method. Optimization problem is formulated is in nonlinear programming problem (NLPP) by SUMT. The model is analyzed and designed for an optimization purpose by using Matlab Software with SUMT (Sequential Unconstrained Minimization Technique), and it is capable of locating directly with high probability the minimum design variables. Optimization for reinforced concrete R.C.C. T-beam girder system is illustrated and the results of the optimum and conventional design procedures are compared.
Keywords: Deck slab, R.C.C T-Beam girder, Reinforced Concrete, Structural optimization.