Evaluation of safety formats for structural assessment based on nonlinear analysis

Červenka, J; Červenka, Vladimír; Sýkora, Milan; Mlčoch, Jan

doi:10.1201/9781315182964-80

Cited by 5 publications

(7 citation statements)

References 1 publication

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“…• f cm = 29.1 MPa, v fc = 15%, and f c0.05 = f ck = 22.6 MPa • f ym = 455 MPa, v fy = 5.8%, and f y0.05 = f yk = 414 MPa These assumptions are based on a more detailed study focused on the performance of safety formats for series systems. 33 Uncertainty in geometrical variables is ignored here to keep focus on the key aspects affecting the performance of the simplified safety formats.…”

Section: Limitation Of Simplified Ecov Methods For Multiple Failure M...mentioning

confidence: 99%

Comparison of advanced semi‐probabilistic methods for design and assessment of concrete structures

Novák

Červenka

et al. 2022

Structural Concrete

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This paper presents the comparison of advanced semi‐probabilistic methods for the design and assessment of concrete structures represented by mathematical models solved by non‐linear finite element methods. The special attention is given to the advanced methods focused on the estimation of the coefficient of variation of structural resistance. Numerical examples represent a replication of laboratory experiments of beams with different failure modes. The obtained results are discussed with respect to the accuracy of the employed methods and the influence of the assumed statistical correlation among basic variables. Simplified methods give a good estimation of the design values, though their accuracy is dependent on the type of the failure mechanism. Moreover, it is shown that mutual correlations among random variables may significantly affect the design value of resistance, and they should be carefully defined and modeled.

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Section: Limitation Of Simplified Ecov Methods For Multiple Failure M...mentioning

confidence: 99%

Comparison of advanced semi‐probabilistic methods for design and assessment of concrete structures

Novák

Červenka

et al. 2022

Structural Concrete

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“…Following [5] the term global resistance (global safety) is used for "assessment of structural response on the high structural level than cross-section".…”

Section: Th Concrete Daysmentioning

confidence: 99%

“…The global resistance approach was initiated by the introduction of non-linear analysis, which is based on a global structural model and offers tools for the safety assessment [5].…”

Section: Available Safety Formats For Non-linear Analysismentioning

confidence: 99%

Safety Formats for Non-Linear Analysis: Are the Current Structural Codes Applicable for Practice?

Tur

Derechennik

Tur

2020

SSP

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The present paper describes and critically analyses the most widely used safety formats (i.e., partial factor method, global resistance methods, and probabilistic method) for non-linear finite element analysis. It is shown that the global resistance approach initiated by the implementation of non-linear analysis, which is on a global structural resistance model and offers tools for the safety evaluation. In the general case, the global safety concept reflects the variability of the structural responses due to the random properties of basic variables. It concluded that all safety formats for non-linear analysis implemented in currently developed codes are contained many uncertainties, statistically incorrect and vague formulations.

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“…Finally, it is checked whether there is a significant difference between the deformation values obtained according to EC2 and REBAP design criteria. The applications guideline for non-linear finite element analysis in structural design are presented in the report of [ 18 ], using the reliability design from the work of [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Displacement Calculation for Service Loads of Reinforced Concrete Beams and Slabs Using Physically Non-Linear Analysis

et al. 2022

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This paper aims to use non-linear physical analysis to calculate the displacement of beams and slabs in a cracked state. This study uses the commercial software SAP2000 to perform a numerical analysis using the finite element formulation, applying the multi-layer method. Initially, a parametric study was carried out to evaluate the vertical displacement for service loads of reinforced concrete beams and slabs using different spans, support conditions and geometry. In order to validate the finite element model, the study compared displacement values for linear analysis using Bares tables. Subsequently, simplified methods of displacement calculation in the long term are applied, using an abacus from Comité Euro-International du Béton (CEB). These values are then compared with the physically non-linear analysis in the long-term cracked state with SAP2000. Two structural codes were used in the numerical and analytical methods, Regulamento de Estruturas de Betão Armado e Pré-Esforçado (REBAP) and Eurocode 2 (EC2), to evaluate their differences in deformation control. Therefore, the main goal is to establish comparisons between the two methods of analysis in order to show that non-linear finite element modelling provides values that are lower than the analytical calculation, thus allowing greater economy in the design of structural reinforced concrete elements. In addition, it can be noted that EC2 has some inconsistencies in the design of simply supported slabs, requiring a greater thickness than a flat square slab and that indirect deformation for REBAP is underestimated for beams and, in some cases, for slabs.

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Evaluation of safety formats for structural assessment based on nonlinear analysis

Cited by 5 publications

References 1 publication

Comparison of advanced semi‐probabilistic methods for design and assessment of concrete structures

Comparison of advanced semi‐probabilistic methods for design and assessment of concrete structures

Safety Formats for Non-Linear Analysis: Are the Current Structural Codes Applicable for Practice?

Displacement Calculation for Service Loads of Reinforced Concrete Beams and Slabs Using Physically Non-Linear Analysis

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