A stress–strain model for uniaxial and confined concrete under compression

Samani, Ali Khajeh; Attard, Mario M.

doi:10.1016/j.engstruct.2012.03.027

Cited by 248 publications

(132 citation statements)

References 37 publications

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“…Many uniaxial concrete models assume that such confining stresses (and strains) are similar in the two lateral directions [83]. However, indications are often missing on how to derive this uniform lateral pressure for the case of RC members such as walls.…”

Section: Accounting For Confinement In Different Approachesmentioning

confidence: 99%

Modelling Approaches for Inelastic Behaviour of RC Walls: Multi-level Assessment and Dependability of Results

Almeida

Tarquini

Beyer

2014

Arch Computat Methods Eng

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The severe damage and collapse of many reinforced concrete (RC) wall buildings in the recent earthquakes of Chile (2010) and New Zealand (2011) have shown that RC walls did not perform as well as required by the modern codes of both countries. It seems therefore appropriate to intensify research efforts towards more accurate simulations of damage indicators, in particular local engineering demand parameters such as material strains, which are central to the application of performance-based earthquake engineering. Potential modelling improvements will necessarily build on a thorough assessment of the limitations of current state-ofthe-practice simulation approaches for RC wall buildings. This work compares different response parameters obtained from monotonic analyses of RC walls using numerical tools that are commonly employed by researchers and specialized practitioners, namely: plastic hinge analyses, distributed plasticity models, and shell element models. It is shown that a multi-level assessment-wherein both the global and local levels of the response are jointly addressed during pre-and post-peak response-is fundamental to define the dependability of the results. The displacement demand up to which the wall response can be predicted is defined as the first occurrence between the attainment of material strain limits and numerical issues such as localization. The present work also presents evidence to discourage the application of performance-based assessment of RC walls relying on nonregularized strain EDPs.

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Section: Accounting For Confinement In Different Approachesmentioning

confidence: 99%

Modelling Approaches for Inelastic Behaviour of RC Walls: Multi-level Assessment and Dependability of Results

Almeida

Tarquini

Beyer

2014

Arch Computat Methods Eng

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“…Therefore, intensive material testing was required (as previously undertaken) to define the parameters required for insertion in the FE software [25]. Within the relevant literature there are a plethora of suggestions discussing the development of concrete behaviour under compression based on experimental tests [26][27][28][29]. The constitutive law for concrete under compression was calculated using an experimentally verified numerical method described by EC2 [30].…”

Section: Materials Modelsmentioning

confidence: 99%

Analytical approach of anchor rod stiffness and steel base plate calculation under tension

et al. 2016

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The analysis of column base plate connections under biaxial moment or when large numbers of anchor rods are utilised is complicated. Such complex connections are regularly found in engineering practice, in spite of proposed, up-to-date finite element modelling techniques and analytical formulations being unsuitable. The lack of suitability arises from their development for non-practical column base plate idealised configurations. In the present paper the results of a finite element study of single-headed anchors under tension are discussed, leading to the derivation of a simple equation that describes the stiffness of the headed anchor rod embedded in concrete. Furthermore, this paper suggests a simple and suitable approach to analyse base plate connections independent of loading scenarios, the number of anchor rods and their arrangement, taking into account the actual rigidity of the connection. In this study, a threedimensional, nonlinear finite element model is developed through the use of the generalpurpose finite element software package ABAQUS. The respective numerical results were verified against experimental ones.

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“…Since the pioneering work of Richart [4] and after him, Balmer [5], many researchers have studied the confined behavior of concrete and proposed confinement models which took account of various parameters such as tie spacing, reinforcement, column shape and concrete strength [6]. Some of the researchers have been mentioned here: Hognestad [7], Popovics [8], Sargin [9], Sargin & Ghosh [10], Shin [11], Carreira [12], Cusson [13], Hoshikuma [14], Hsu [15], Razvi [16], Wee [17], Chung [18], Mander [19], Kotsovos [20], Newman [21], Chern [22], lmran [23], Lan [24], Li [25].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Triaxial Behavior of Concrete under Lateral Confining Stress

Javanmardi¹

2017

Open Civil Eng. J.

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Background:Loads on most of reinforced and prestressed concrete structures, are triaxial. For the principled analysis and design of these structures, being aware of the concrete behavior under triaxial stress states is essential. Also studying the stress-strain curves under triaxial loads for nonlinear analysis and design of reinforced and prestressed concrete structures, is important. Method:In this study, for better comprehension of the behavior of confined concrete, the uniaxial and triaxial tests are performed on the cylindrical specimens and the relationship between axial stress, lateral confining stress, and uniaxial compressive strength, is calculated and compared to the proposed relationships of other researchers. Results and Conclusion:In addition, a comparison is made between the test results, the results of others in the literature and Attard [1] model.

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A stress–strain model for uniaxial and confined concrete under compression

Cited by 248 publications

References 37 publications

Modelling Approaches for Inelastic Behaviour of RC Walls: Multi-level Assessment and Dependability of Results

Modelling Approaches for Inelastic Behaviour of RC Walls: Multi-level Assessment and Dependability of Results

Analytical approach of anchor rod stiffness and steel base plate calculation under tension

Experimental Study of Triaxial Behavior of Concrete under Lateral Confining Stress

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