Publikace detail

A stochastic model for the capacity estimation of non-seismically designed beam-column joints

Autoři: Yurdakul Özgür | Tunaboyu Onur | Řoutil Ladislav | Avsar Ozgur

Rok: 2018

Druh publikace: článek ve sborníku

Název zdroje: Proceedings of the 12th fib International PhD Symposium in Civil Engineering

Název nakladatele: České vysoké učení technické v Praze

Místo vydání: Praha

Strana od-do: 813-819

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	A stochastic model for the capacity estimation of non-seismically designed beam-column joints	An analytical model based on nonlinear fracture mechanics was employed to evaluate the shear capacity of a substandard beam-column joint retrofitted by externally applied post-tensioned bars. The strength of the reference specimen was predicted as the capacity of plain concrete under tension with microcracks in the fracture process zone smeared over a band - i.e. crack band theory. Crack minimization effects in the specimens retrofitted by post-tensioned bars were considered by strain energy stored in the bars per unit fracture surface area. Due to the inherent uncertainty in material constitutive laws, the analytical model was evolved to a stochastic level to propose a more advanced model for estimating the capacity. It is found that the experimental results were within the prominent range of Probability Density Functions (i.e. mean ± one standard deviation) of the estimated joint tensile stress.	beam-column joint; shear capacity; externally applied post-tensioned bars; nonlinear fracture mechanics; stochastic model
eng	A stochastic model for the capacity estimation of non-seismically designed beam-column joints	An analytical model based on nonlinear fracture mechanics was employed to evaluate the shear capacity of a substandard beam-column joint retrofitted by externally applied post-tensioned bars. The strength of the reference specimen was predicted as the capacity of plain concrete under tension with microcracks in the fracture process zone smeared over a band - i.e. crack band theory. Crack minimization effects in the specimens retrofitted by post-tensioned bars were considered by strain energy stored in the bars per unit fracture surface area. Due to the inherent uncertainty in material constitutive laws, the analytical model was evolved to a stochastic level to propose a more advanced model for estimating the capacity. It is found that the experimental results were within the prominent range of Probability Density Functions (i.e. mean ± one standard deviation) of the estimated joint tensile stress.	beam-column joint; shear capacity; externally applied post-tensioned bars; nonlinear fracture mechanics; stochastic model

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