A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Partially loaded areas in reinforced concrete: Mechanical modelling
https://orcid.org/0000-0003-1212-6121
https://orcid.org/0000-0001-8371-3863
https://orcid.org/0000-0002-8415-4896
Highlights The mechanical behaviour of concrete under local compressive forces is reviewed. A knowledge gap exists in the theoretical understanding of the problem. Stress fields for plane and axisymmetric bearing capacity problems are presented. The stress fields have several advantages over existing design approaches. A step towards mechanically-based design rules for partially loaded areas is made.
Abstract The introduction of high compressive forces on concrete members over limited contact areas is a common problem in engineering practice. Despite extensive research, a knowledge gap persists in the mechanical understanding of this seemingly simple problem. This paper first summarises the state of the art regarding the bearing capacity problem in structural concrete and then introduces two new stress field solutions for plane and axisymmetric cases of partial area loading. Contrary to most existing design approaches, which are purely empirical, the models proposed build on consistent mechanical bases that ensure safe design. The stress fields consider consistently the beneficial effect of reinforcement and the multiaxial compressive strength of concrete. Moreover, they enable the flow of forces to be followed through the structure, resulting in consistent dimensioning and detailing of the reinforcement. The comparison with existing design approaches shows that the stress fields predict significantly higher bearing capacities, enabling the design of more efficient and sustainable structures. In a companion paper, the stress fields are validated with published experimental data and an extensive test campaign conducted by the authors.
Partially loaded areas in reinforced concrete: Mechanical modelling
https://orcid.org/0000-0003-1212-6121
https://orcid.org/0000-0001-8371-3863
https://orcid.org/0000-0002-8415-4896
Highlights The mechanical behaviour of concrete under local compressive forces is reviewed. A knowledge gap exists in the theoretical understanding of the problem. Stress fields for plane and axisymmetric bearing capacity problems are presented. The stress fields have several advantages over existing design approaches. A step towards mechanically-based design rules for partially loaded areas is made.
Abstract The introduction of high compressive forces on concrete members over limited contact areas is a common problem in engineering practice. Despite extensive research, a knowledge gap persists in the mechanical understanding of this seemingly simple problem. This paper first summarises the state of the art regarding the bearing capacity problem in structural concrete and then introduces two new stress field solutions for plane and axisymmetric cases of partial area loading. Contrary to most existing design approaches, which are purely empirical, the models proposed build on consistent mechanical bases that ensure safe design. The stress fields consider consistently the beneficial effect of reinforcement and the multiaxial compressive strength of concrete. Moreover, they enable the flow of forces to be followed through the structure, resulting in consistent dimensioning and detailing of the reinforcement. The comparison with existing design approaches shows that the stress fields predict significantly higher bearing capacities, enabling the design of more efficient and sustainable structures. In a companion paper, the stress fields are validated with published experimental data and an extensive test campaign conducted by the authors.
Partially loaded areas in reinforced concrete: Mechanical modelling
https://orcid.org/0000-0003-1212-6121
https://orcid.org/0000-0001-8371-3863
https://orcid.org/0000-0002-8415-4896
Highlights The mechanical behaviour of concrete under local compressive forces is reviewed. A knowledge gap exists in the theoretical understanding of the problem. Stress fields for plane and axisymmetric bearing capacity problems are presented. The stress fields have several advantages over existing design approaches. A step towards mechanically-based design rules for partially loaded areas is made.
Abstract The introduction of high compressive forces on concrete members over limited contact areas is a common problem in engineering practice. Despite extensive research, a knowledge gap persists in the mechanical understanding of this seemingly simple problem. This paper first summarises the state of the art regarding the bearing capacity problem in structural concrete and then introduces two new stress field solutions for plane and axisymmetric cases of partial area loading. Contrary to most existing design approaches, which are purely empirical, the models proposed build on consistent mechanical bases that ensure safe design. The stress fields consider consistently the beneficial effect of reinforcement and the multiaxial compressive strength of concrete. Moreover, they enable the flow of forces to be followed through the structure, resulting in consistent dimensioning and detailing of the reinforcement. The comparison with existing design approaches shows that the stress fields predict significantly higher bearing capacities, enabling the design of more efficient and sustainable structures. In a companion paper, the stress fields are validated with published experimental data and an extensive test campaign conducted by the authors.
Partially loaded areas in reinforced concrete: Mechanical modelling
Markić, Tomislav (author) / Morger, Fabian (author) / Kaufmann, Walter (author)
Engineering Structures ; 271
2022-09-01
Article (Journal)
Electronic Resource
English
Partially loaded areas in reinforced concrete: Experimental campaign and model validation
| Elsevier | 2022
| British Library Online Contents | 2015