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Sensitivity Analysis of RC Beam under Flexure and Shear by FOSM Method

Sensitivity Analysis of RC Beam under Flexure and Shear by FOSM Method
	© 2023 by IJETT Journal
	Volume-71 Issue-1
	Year of Publication : 2023
	Author : N. Dharmesh, L. Govindaraju
	DOI : 10.14445/22315381/IJETT-V71I1P213

How to Cite?

N. Dharmesh, L. Govindaraju, "Sensitivity Analysis of RC Beam under Flexure and Shear by FOSM Method," International Journal of Engineering Trends and Technology, vol. 71, no. 1, pp. 141-151, 2023. Crossref, https://doi.org/10.14445/22315381/IJETT-V71I1P213

Abstract
Two types of problems are usually observed in the field of structural design. The complete cross-section dimensions of the member, including details about the reinforcing steel and its material qualities, are known in the first type of problem, known as analysis problems. The second type is design problems. Since the load effects, in this case, are known, it is necessary to choose the proper grades of materials, the size of the members, and reinforcement details. In this study design of an RC fixed beam has been undertaken to study the variations in the strength of reinforced concrete members in flexure and shear. The study investigates the sensitivity of design parameters, including concrete compressive strength, steel yield strength, area of steel reinforcement, width and effective depth of the beam, and external moment to the RC fixed beam. A sensitivity analysis of an RC beam is performed using the first-order second-moment method (FOSM). 20 percentage variations in members for flexure and shear of RC fixed beam have been analyzed by the MATLAB program. The FOSM method was used in arriving at the reliability index. The compressive strength of concrete, area of vertical stirrups and spacing of vertical stirrups have the least influence on flexure and shear strength. The strength of the RC fixed beam is significantly affected by the remaining variables.

Keywords
Area of steel, Effective depth, FOSM method, MATLAB, Reliability index.

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