RELIABILITY ANALYSIS OF A CONCRETE COLUMN BY RESPONSE SURFACE METHOD IN THE ANSYS ENVIRONMENT
Kathleen Guimarães Santana1; João Pedro Franco de Mello1; Rafaella Moreira Lima Gondim1; Rodrigo de Azevêdo Neves1
1 Instituto Federal do Maranhão
doi:10.20906/CPS/CILAMCE2015-0342
Resumo
Due to the diverse number of uncertainties in the process of determining stresses and strength in concrete structures, structural reliability, established in probabilistic terms, appears as a good alternative to a better knowledge of the project. According to the literature, this quantity can be measured from a survival probability or a failure probability. The Response Surface Method, used in this work, is basically a design of experiments in order to optimize an output variable, which is influenced by the input variables. This method requires a simulation procedure that provides random sampling using the response surface equations. For this purpose, Monte Carlo Simulations were also applied. Computational analysis was proven to be appropriate in dealing with this sort of problem, due to the quickness and stability of the solutions. In this work, it is shown an example of the use of Response Surface Method to determine the reliability of a concrete column with three random variables. This choice is justified by the difficulty in using other methods when there is an increase in the number of random variables to the problem. The analysis of a probabilistic model with three random variables linked to a simplified mechanical model of a concrete column was performed in this paper. The computational environment used is ANSYS.
Palavras-chave: Failure Probability; Structural Reliability; Concrete; Monte Carlo Method; Response Surface Method