scholarly journals A NEW PARALLEL ALGORITHM FOR THE OPTIMUM EMBEDDED REBAR MESH GENERATION FOR LARGE-SCALE REINFORCED CONCRETE STRUCTURES

2021 ◽  
Author(s):  
Dewald Gravett ◽  
George Markou
Keyword(s):  
Reinforced Concrete ◽  
Parallel Algorithm ◽  
Mesh Generation ◽  
Large Scale ◽  
Concrete Structures ◽  
Reinforced Concrete Structures

scholarly journals A new testing method for textile reinforced concrete under impact load

2018 ◽  
Vol 199 ◽  
pp. 11010 ◽  
Author(s):  
Marcus Hering ◽  
Manfred Curbach
Keyword(s):  
Reinforced Concrete ◽  
Large Scale ◽  
Impact Load ◽  
Impact Resistance ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Impact Loads ◽  
Textile Reinforced Concrete ◽  
Reinforcement Structure ◽  
Testing Method

Textile reinforced concrete, especially textile reinforced concrete with carbon fibres, was already been used for strengthening steel reinforced concrete structures under static loads up to now. The question is if the composite can also be used for strengthening structures against impact loads. The main goal of a current research project at the Technische Universität Dresden is the development and characterization of a reinforcement fabric with optimized impact resistance. But there is a challenge. There is the need to find the best combination of fibre material (glass, carbon, steel, basalt, …) and reinforcement structure (short fibres, 2D-fabrics, 3D-fabrics, …), but testing the large number of possible combinations is not possible with the established methods. In general, large-scale tests are necessary which are very expensive and time consuming. Therefore, a new testing method has been developed to deal with this large number of possible combinations of material and structural experiments. The following paper describes this new testing method to find the best fabric reinforcement for strengthening reinforced concrete structures against impact loads. The testing devise, which is located in the drop tower facility at the Otto Mohr Laboratory, and the test set-up are illustrated and described. The measurement equipment and the methods to evaluate the experimental results are explained in detail.

scholarly journals A new bond slip model for reinforced concrete structures

2015 ◽  
Vol 32 (7) ◽  
pp. 1934-1958 ◽  
Author(s):  
C Mang ◽  
L Jason ◽  
L Davenne
Keyword(s):  
Reinforced Concrete ◽  
Large Scale ◽  
Concrete Structures ◽  
Interface Element ◽  
Displacement Curve ◽  
Reinforced Concrete Structures ◽  
Slip Model ◽  
Content Type ◽  
Bond Slip ◽  
Proposed Model

Purpose – The purpose of this paper is to present a new bond slip model for reinforced concrete structures. It consists in an interface element (3D) which represents the interface between concrete (modeled in 3D) and steel, modeled using 1D truss elements. Design/methodology/approach – The formulation of the interface element is presented and verified through a comparison with an analytical solution on an academic case. Finally, the model is compared with experimental results on a reinforced concrete tie. Findings – Contrary to the classical perfect or “no-slip” relation which supposes the same displacement between steel and concrete, the proposed model is able to reproduce both global (force-displacement curve) and local (crack openings) results. Originality/value – The proposed approach, applicable to large-scale computations, represents a valuable alternative to the no-slip relation hypothesis to correctly capture the crack properties of reinforced concrete structures.

scholarly journals ANALYSIS OF THE APPLICATION OF COMPOSITE POLYMER REINFORCEMENT IN REINFORCED CONCRETE DESIGNS

2017 ◽  
Vol 2 (3) ◽  
pp. 45-50
Author(s):  
Полоз ◽  
Maksim Poloz ◽  
Фролов ◽  
Nikolay Frolov ◽  
Ноурузи ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Building Material ◽  
Large Scale ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Scale Production ◽  
Composite Polymer ◽  
Metallic Composite ◽  
Large Scale Production ◽  
Metallic Reinforcement

The article reviewed the experience with the application of non-metallic composite polymer reinforcement in reinforced concrete structures. It is revealed, that in Russia composite polymer reinforcement is a relatively new building material, large-scale production and implementation of which begins to be just now. The analysis showed that the perception of usefulness of composite polymer reinforcement only in prestressed reinforced concrete constructions is incorrect positioning on the field of application. In bringing together the interests of researchers, design institutes, manufacturers and consumers composite polymer reinforcement importance of Association of organizations for the production and application of non-metallic reinforcement and products «Non-metallic composite reinforcement».

Design of precast reinforced concrete structures of frame buildings: a new set of rules

2019 ◽  
pp. 4-9 ◽  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Building Frames ◽  
Fine Grained ◽  
Rigid Frame ◽  
Floor Slabs ◽  
Frame Buildings ◽  
Spatial System ◽  
Precast Elements

Currently, prefabricated reinforced concrete structures are widely used for the construction of buildings of various functional purposes. In this regard, has been developed SP 356.1325800.2017 "Frame Reinforced Concrete Prefabricated Structures of Multi-Storey Buildings. Design Rules", which establishes requirements for the calculation and design of precast reinforced concrete structures of frame buildings of heavy, fine-grained and lightweight structural concrete for buildings with a height of not more than 75 m. The structure of the set of rules consists of eight sections and one annex. The document reviewed covers the design of multi-story framed beam structural systems, the elements of which are connected in a spatial system with rigid (partially compliant) or hinged joints and concreting of the joints between the surfaces of the abutting precast elements. The classification of structural schemes of building frames, which according to the method of accommodation of horizontal loads are divided into bracing, rigid frame bracing and framework, is presented. The list of structural elements, such as foundations, columns, crossbars, ribbed and hollow floor slabs and coatings, stiffness elements and external enclosing structures is given; detailed instructions for their design are provided. The scope of the developed set of rules includes all natural and climatic zones of the Russian Federation, except seismic areas with 7 or more points, as well as permafrost zones.

Improvement Of Curvilinear Diagrams Of Concrete Deformation

2019 ◽  
pp. 99-104
Keyword(s):  
Reinforced Concrete ◽  
Peak Load ◽  
Experimental Studies ◽  
Concrete Structures ◽  
Deformation Model ◽  
Reinforced Concrete Structures ◽  
Significant Difference ◽  
Deformation Diagrams

Problems when calculating reinforced concrete structures based on the concrete deformation under compression diagram, which is presented both in Russian and foreign regulatory documents on the design of concrete and reinforced concrete structures are considered. The correctness of their compliance for all classes of concrete remains very approximate, especially a significant difference occurs when using Euronorm due to the different shape and sizes of the samples. At present, there are no methodical recommendations for determining the ultimate relative deformations of concrete under axial compression and the construction of curvilinear deformation diagrams, which leads to limited experimental data and, as a result, does not make it possible to enter more detailed ultimate strain values into domestic standards. The results of experimental studies to determine the ultimate relative deformations of concrete under compression for different classes of concrete, which allowed to make analytical dependences for the evaluation of the ultimate relative deformations and description of curvilinear deformation diagrams, are presented. The article discusses various options for using the deformation model to assess the stress-strain state of the structure, it is concluded that it is necessary to use not only the finite values of the ultimate deformations, but also their intermediate values. This requires reliable diagrams "s–e” for all classes of concrete. The difficulties of measuring deformations in concrete subjected to peak load, corresponding to the prismatic strength, as well as main cracks that appeared under conditions of long-term step loading are highlighted. Variants of more accurate measurements are proposed. Development and implementation of the new standard GOST "Concretes. Methods for determination of complete diagrams" on the basis of the developed method for obtaining complete diagrams of concrete deformation under compression for the evaluation of ultimate deformability of concrete under compression are necessary.

SEISMIC ANALYSIS OF MULTISTOREY REINFORCED CONCRETE STRUCTURES

2019 ◽  
Vol 9 (1) ◽  
pp. 61
Author(s):  
SINGH RAVIKANT ◽  
KUMAR SINGH VINAY ◽  
YADAV MAHESH ◽  
◽  
◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Seismic Analysis ◽  
Concrete Structures ◽  
Reinforced Concrete Structures
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