The article evaluates the reliability of bent-reinforced concrete beams

Abstract

The research evaluates the reliability of bent-reinforced concrete beams, in order to provide a specific view on the influence of the variation of some design variables on the flexural strength of the reinforced concrete beam section. From this, the research continues to carry out a survey of the reliability of the reinforced concrete beam structures as well as its displacement probability distribution. In this paper, there are two methods used to evaluate the reliability: The First Order Reliability Method (FORM) and Monte Carlo Method. Besides, researchers also use the linear analysis and nonlinear analysis for the evaluation. The results of sensitivity analysis identify variables that greatly affect the beam including concrete strength (Rb), loading capacity (P), steel strength (Rs), and steel area (As). Evaluating the reliability by Monte Carlo method combined with nonlinear analysis has given the smallest reliability compared with the other methods. The results of analyzing and constructing the maximum displacement probability distribution of the beam being investigated have showed that the coefficient of variation in displacement is quite low, only 7.1%.

Key word: Reliability; the first order reliability method; monte Carlo method; linear analysis; Nonlinear analysis; displacement.