Accelerated testing and modeling of concrete durability subjected to coupled environmental and mechanical loading

Xi, Yunping; Willam, Kaspar; Ababneh, D.M. Frangopol; Nakhi, Ammar Ben; Kong, Jung Sik; Nogueira, Christianne de Lyra

doi:10.1016/b978-008043890-0/50006-7

Cited by 2 publications

(1 citation statement)

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“…A generally adopted method is to introduce a damage index from mechanical loading into material coefficients that are related to transport properties (Boddy et al, 1999;Xi et al, 2001;Xiang and Zhao, 2007); this implies that mechanical damage occurs prior to environment-related effects, and this is followed by penetration of ions. This method is quite effective for modelling the durability of materials on the condition of physical load, but does not relate well to describing the real simultaneous loading process in the field.…”

Section: Introductionmentioning

confidence: 99%

Damage of concrete subjected to simultaneous fatigue load and thermal effect

Sun

Jiang

2012

Magazine of Concrete Research

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Physical loads and environmental actions have simultaneous effects on concrete in nature. An analytical method is proposed to detect the damage to concrete subjected to four-point flexure fatigue load and thermal hysteresis in freeze–thaw. The interaction of the two kinds of loads on the combined damage, in terms of a coefficient fD(T), is defined to characterise quantification. Damage is aggravated by the combined loads when fD(N)>1 as compared to isolated loading. The results show that increasing fD(N) is always seen in the freezing stage, since damage as a result of tensile stress only is being considered here. Moreover, a critical point above which the damage is aggravated by the combined loads is found by extrapolating the maximum values of fD(N) until fD(N)=1 at N = 380 000, that is close to the average life (N = 348 310) obtained from the experiments. This work provides a framework to explore the coupled effects on damage from physical loads and environmental actions.

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Section: Introductionmentioning

confidence: 99%