Moment matching technique for fast and robust uncertainty quantifications of complex systems

<p>Despite the growing popularity of reinforced concrete (RC) core walls, robust uncertainty quantification of their global and local performances remains an intractable challenge. A combination of a random sampling technique in conjunction with a simplified structural analysis has been widely used, but substantial ambiguity remains in the simulation accuracy and the resultant uncertainties. As a fast and robust alternative, this study suggests a moment matching (MM) technique. MM can dramatically reduce required sample points to only a few, which enables a direct use of a high-precision parallel multiscale finite element analysis (PM-FEA) for uncertainty quantification. This study demonstrates how to apply the combination of MM and PM-FEA to quantify uncertainties behind complex RC core walls, notably in terms of global force-resisting capacity and microscopic progressive bar buckling of five U-shaped walls. Results suggest that the combination of MM and PM-FEA will serve as a promising method to improve our understanding of uncertainties behind complex RC structure.</p>

Name thesis:degree_name

Master of Science

Level thesis:degree_level

thesis

Discipline thesis:degree_discipline

Civil Engineering

Department dc:contributor.department

Department of Civil, Construction and Environmental Engineering

Year dc:date.issued

2018

Author dc:creator

• Teng, Ya-Lu

Advisor dc:contributor.advisor

• In Ho Cho

Language dc:language.iso

en

Identifier

archive/lib.dr.iastate.edu/etd/16887/

OAI identifier oai:identifier

oai:dr.lib.iastate.edu:20.500.12876/31070