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Finite element-based reliability analysis of reinforced concrete masonry walls under eccentric axial loading considering slenderness effects
Abstract This paper presents a finite element (FE)-based reliability analysis of reinforced concrete masonry walls under eccentric axial loading, considering the slenderness effect. The main purpose is to (1) examine the importance of model error and (2) investigate the effect of different failure criteria on the reliability assessment of masonry walls. To achieve this goal, three representative walls with different slenderness ratios, designed in accordance with CSA S304–14 provisions, are selected for the reliability analysis. Finite element models of masonry walls are used to formulate the limit-state function for the reliability problems considered. A subset simulation algorithm in conjunction with Polynomial- Chaos-Kriging (PCK) surrogate models is used to address the computational cost involved in FE-based reliability analysis. It is found that the reliability assessment results are highly dependent on the model error. In addition, it is found that the local failure criteria are not always more conservative compared to global (wall) failure criteria due to stability failure, particularly for slender walls or walls designed with vertical loads at low eccentricities. Furthermore, it is found that other factors are found to influence the reliability assessment, including the slenderness ratio, load ratio, and eccentricity-to-thickness ratio, leading to reliability-inconsistent designs according to the current codes.
Highlights A macro finite element model is developed for the simulation of reinforced concrete masonry walls under eccentric axial loading considering slenderness effects. Model error associated with the finite element model is quantified by compiling an experimental database. Incorporation of model error is crucial for reliability analysis. The influence of load eccentricity-to-thickness ratio, slenderness ratio, and load ratio on the reliability assessment is investigated. The effects of different failure criteria (i.e., limit states) on the reliability assessment are studied.
Finite element-based reliability analysis of reinforced concrete masonry walls under eccentric axial loading considering slenderness effects
Abstract This paper presents a finite element (FE)-based reliability analysis of reinforced concrete masonry walls under eccentric axial loading, considering the slenderness effect. The main purpose is to (1) examine the importance of model error and (2) investigate the effect of different failure criteria on the reliability assessment of masonry walls. To achieve this goal, three representative walls with different slenderness ratios, designed in accordance with CSA S304–14 provisions, are selected for the reliability analysis. Finite element models of masonry walls are used to formulate the limit-state function for the reliability problems considered. A subset simulation algorithm in conjunction with Polynomial- Chaos-Kriging (PCK) surrogate models is used to address the computational cost involved in FE-based reliability analysis. It is found that the reliability assessment results are highly dependent on the model error. In addition, it is found that the local failure criteria are not always more conservative compared to global (wall) failure criteria due to stability failure, particularly for slender walls or walls designed with vertical loads at low eccentricities. Furthermore, it is found that other factors are found to influence the reliability assessment, including the slenderness ratio, load ratio, and eccentricity-to-thickness ratio, leading to reliability-inconsistent designs according to the current codes.
Highlights A macro finite element model is developed for the simulation of reinforced concrete masonry walls under eccentric axial loading considering slenderness effects. Model error associated with the finite element model is quantified by compiling an experimental database. Incorporation of model error is crucial for reliability analysis. The influence of load eccentricity-to-thickness ratio, slenderness ratio, and load ratio on the reliability assessment is investigated. The effects of different failure criteria (i.e., limit states) on the reliability assessment are studied.
Finite element-based reliability analysis of reinforced concrete masonry walls under eccentric axial loading considering slenderness effects
Metwally, Ziead (author) / Li, Yong (author) / Zeng, Bowen (author)
Engineering Structures ; 304
2024-01-29
Article (Journal)
Electronic Resource
English