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Abstract
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Article Information:
Application of Probabilistic Analysis in Finite Element Modeling of Prestressed Inverted T-Beam with Web Openings
Tie Ming, Cheng Hock Tian, Zahrizan bin Zakaria and Ideris bin Zakaria
Corresponding Author: Tie Ming
Submitted: 2011 September, 23
Accepted: 2011 November, 04
Published: 2012 February, 15 |
Abstract:
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Recent trends of structural mechanics applications in finite element analysis demonstrate an
increasing demand for efficient analysis tools. This paper presents a probabilistic analysis approach applied in
finite element analysis for modeling prestressed inverted T-beams with web openings structure used in building
service system (mechanical, electrical, communications, and plumbing). The experimental program reported
in this paper tested four prestressed inverted T-beams with circular web openings to failure to evaluate the
openings' effect on various beam behaviors. Using ANSYS, finite element models were developed to simulate
beam deflection behavior. Comparison of analytical results with the available experimental results for loaddeflection
relationships showed good agreement between both results. Probabilistic analysis methodology could
predict the response (i.e., deflection, stress, strain etc) due to various combination of input variables (i.e.,
Poisson`s ratio, modulus of elasticity, etc). In reality, uncertainties exist in a system and environment that may
make the application of deterministic design unreliable which causes the values of the variables that are acting
on the system cannot be predicted with certainty. As such, probabilistic approach was applied to the model after
deterministic analysis. In this study, the probabilistic analysis approach was applied to account for the
variability in fabrication. Probabilistic methodology applied in finite element modeling provides another
alternative ways of structural analysis of preststressed inverted T-beams with web openings to achieve a robust
and reliable design in a more efficient way. In this study, Monte Carlo simulation was used to analyze the effect
of parameter uncertainty for the prestressed inverted T-beams with web openings. From the analysis results,
it was observed that the changes in prestressing force, elastic modulus of prestressing steel, ultimate tensile
strength of prestressing steel and beam width tend to be the most influencing parameters, which need to be
tightly controlled. As a result, from deterministic analysis and probabilistic analysis, it was found that
probabilistic analysis tends to be closer to reality than deterministic methods and gives a way of designing for
quality.
Key words: Finite element modeling, monte carlo simulation, prestressed inverted t-beams, probabilistic analysis, , ,
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Cite this Reference:
Tie Ming, Cheng Hock Tian, Zahrizan bin Zakaria and Ideris bin Zakaria, . Application of Probabilistic Analysis in Finite Element Modeling of Prestressed Inverted T-Beam with Web Openings. Research Journal of Applied Sciences, Engineering and Technology, (04): 350-366.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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