Experimental-computational determination of mechanical fracture

Doležel, Petr; Lehký, David; Šimonová, Hana; Kucharczyková, Barbara; Keršner, Zbyněk; Novák, Drahomı ́r; Zimmermann, Tanja; Strauß, Alfred

doi:10.1201/b17618-116

Cited by 13 publications

(24 citation statements)

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“…Table 2. shows the mean values and the corresponding probability distribution function of material parameters identified in [9]. Table 3.…”

Section: Utilization Of Stochastic Modelsmentioning

confidence: 99%

“…The results of earlier performed fracturemechanical parameters tests of notched beams subjected to three-point loading and also wedge splitting tests (see Figure 1) were basis for relatively large database [9]. Presented database could be worked out thanks a large testing campaign, which was performed at Faculty of Civile Engineering, Brno University of Technology, Czech Republic in cooperation with IKI BOKU University, Vienna and Austrian company Franz Oberndorfer GmbH & Co KG.…”

Section: Fracture-mechanical Parametersmentioning

confidence: 99%

“…The concrete used by Franz Oberndorfer GmbH & Co KG has been tested. Based on these tests the fracturemechanical parameters of two tested concrete mixtures and their statistical distributions were evaluated [9]. Subsequently, studies have been performed on (1) seven full scale prestressed concrete roof elements with a span width of 30.00 m and a height of 0.50 m to 0.90 m, made of C50/60 and different reinforcement layouts, and (2) twelve scaled laboratory tested elements with a length of 5.00 m and heights from 0.30, 0.45 and 0.60 m in order to capture scaling effects in the shear capacity.…”

Section: Basic Concept For Advanced Modelingmentioning

confidence: 99%

“…The comprehensive experimental study of material parameters were performed first [9], [11], [12]. It was understood from the early beginning that to develop very good numerical model for comparison with experiment of real structure would be impossible without the the proper knowledge of fracture-mechanical parameters.…”

Section: Fracture-mechanical Parametersmentioning

confidence: 99%

“…In particular the two concrete mixtures commonly used in the concrete industry were tested -C50/60 and C40/50 [9]. Samples were tested for hardening after 1, 7, 28 and 126 days [11], [12], [13], [14] and [15].…”

Section: Real Structurementioning

confidence: 99%

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Shear failure of pre-stressed concrete T-shaped girders: Experiment and nonlinear modeling

et al. 2015

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The paper presents essential steps in the development of numerical computational model of destructive test of prestressed T-shaped concrete girder. First, a series of material, small scale component tests have been performed in collaboration between two laboratories. Based on these tests identification of fracture-mechanical parameters (and their statistics) for two concrete mixtures used for the production of precast structural members was performed. Subsequently, studies have been performed on (a) full scale pre-stressed concrete roof elements with a span width of 30.00 m and a height of 0.50 m to 0.90 m, made of C50/60 and different reinforcement layouts, and (b) twelve scaled laboratory tested elements with a length of 5.00 m and heights from 0.30, 0.45 and 0.60 m in order to capture size effects in the shear bearing performance.

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“…Table 2. shows the mean values and the corresponding probability distribution function of material parameters identified in [9]. Table 3.…”

Section: Utilization Of Stochastic Modelsmentioning

confidence: 99%

Section: Fracture-mechanical Parametersmentioning

confidence: 99%

Section: Basic Concept For Advanced Modelingmentioning

confidence: 99%

Section: Fracture-mechanical Parametersmentioning

confidence: 99%

Section: Real Structurementioning

confidence: 99%

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Shear failure of pre-stressed concrete T-shaped girders: Experiment and nonlinear modeling

et al. 2015

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Zuverlässigkeit schlanker Betonstützen

Strauß¹,

Benko

Tãubling³

et al. 2017

Beton und Stahlbetonbau

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In diesem Beitrag werden Berechnungen und vergleichende experimentelle Ergebnisse des Stabilitätsverlusts von schlanken Stahlbetonstützen aus einer Versuchsreihe präsentiert. Das primäre Ziel der Arbeit war der Vergleich der Bemessungsmethoden bei der Ermittlung der globalen Zuverlässigkeit schlanker Stahlbetonstützen. Der Schlankheitsgrad der Stützen betrug λ > 90, wobei die untersuchten Stützen nach EN 1992‐1‐1 dimensioniert wurden. Die oben erwähnten experimentellen Untersuchungen dienten zudem als Grundlage für die Bewertung und Kalibrierung der deterministischen und probabilistischen nichtlinearen Modellbildung. Diese probabilistische Modellbildung der Normalkraft‐Momenten (N‐M)‐Beziehung und des Stabilitätsversagens ist eine Grundlage für die Entwicklung eines objektivierten Bemessungsansatzes und der zugehörigen Teilsicherheitsbeiwerte.

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Combined shear and flexure performance of prestressing concrete T‐shaped beams: Experiment and deterministic modeling

Strauß

Krug

Slowik

et al. 2017

Structural Concrete

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The development of a nonlinear numerical computational model for the detailed description of destructive tests generally requires a multiple-stage, strategic model updating procedure. In this contribution, a model updating procedure is applied to the simulation of prestressed reinforced concrete (RC) beams. The combined ultimate shear and flexure capacity of the beams is affected by many complex phenomena, such as the multi-axial state of stress, the anisotropy induced by diagonal concrete cracking, the interaction between concrete and reinforcement (bond), and the brittleness of the failure mode. In this research, a series of material, small-scale component fracture tests were carried out by two collaborating laboratories. These tests provided advanced statistical identification of the fracture-mechanical parameters of the optimized concrete mixtures for the prestressed laboratory-tested beams mentioned above (with a span of 5.00 m) and associated field-tested, longspan concrete TT roof elements (with a span of 30.00 m). Ten scaled laboratorytested beams with heights of 0.30, 0.45, and 0.60 m were used in a procedure for the comprehensive updating of the nonlinear numerical model with respect to shear resistance performance. The objectives of this research are, in addition to the analysis, the effective development of an updating process for nonlinear numerical modeling which is based on the information from different monitoring systems. Hence, this contribution focuses on the presentation of a comprehensive updating procedure for the shear capacity of nonlinear numerical models of prestressed beam elements using information about fracture-mechanical material parameters gained from (a) different monitoring systems and (b) code-based methods. K E Y W O R D S experimental testing, monitoring systems, nonlinear numerical modeling, prestressed beam elements, shear capacity, updating procedure 1 | INTRODUCTIONThe ultimate capacity of RC beams subjected to combined shear and flexure is affected by many complex phenomena, such as the existing multi-axial state of stress, the anisotropy induced by diagonal concrete cracking, the interaction between concrete and reinforcement (bond), and the brittleness of the failure mode. A large number of shear tests have been performed during the last decades, as summarized in Reference 1 in order to obtain valuable information about the shear transfer mechanisms involved. Currently, both in the United States and in Europe, shear design provisions/ recommendations are undergoing revision. Open questions concern, among other things, the influence of the degree of reinforcement and the prestressing level. Many different model formulations have been proposed. They are either Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.

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Experimental-computational determination of mechanical fracture

Cited by 13 publications

References 0 publications

Shear failure of pre-stressed concrete T-shaped girders: Experiment and nonlinear modeling

Shear failure of pre-stressed concrete T-shaped girders: Experiment and nonlinear modeling

Zuverlässigkeit schlanker Betonstützen

Combined shear and flexure performance of prestressing concrete T‐shaped beams: Experiment and deterministic modeling

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