Calibration of Australian Standard AS3600 Concrete Structures: part I statistical analysis of material properties and model error

2016 ◽  
Vol 17 (4) ◽  
pp. 242-253 ◽  
Author(s):  
Stephen J. Foster ◽  
Mark G. Stewart ◽  
Mindy Loo ◽  
Mukshed Ahammed ◽  
Vute Sirivivatnanon
Keyword(s):  
Statistical Analysis ◽  
Material Properties ◽  
Concrete Structures ◽  
Model Error ◽  
Australian Standard

Material and Structural Properties for Creating High Performance Concrete Structures

2014 ◽  
Vol 629-630 ◽  
pp. 21-27
Author(s):  
György L. Balázs
Keyword(s):  
Structural Properties ◽  
Material Properties ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Structures ◽  
Structural Elements ◽  
Design Rules ◽  
Existing Structures ◽  
New Codes ◽  
Specific Material

HPC and UHPC concretes are finding their ways both to new structures and to retrofitting of existing structures. Herein specific material properties as well as structural examples are discussed. New Codes and Recommendations provide description of material properties and design rules for HPC/UHPC structures and structural elements.

scholarly journals FRP REINFORCEMENT FOR CONCRETE STRUCTURES: STATE-OF-THE-ART REVIEW OF APPLICATION AND DESIGN

2014 ◽  
Vol 5 (4) ◽  
pp. 147-158 ◽  
Author(s):  
Eugenijus Gudonis ◽  
Edgaras Timinskas ◽  
Viktor Gribniak ◽  
Gintaris Kaklauskas ◽  
Aleksandr K. Arnautov ◽  
...  
Keyword(s):  
Material Properties ◽  
Structural Engineering ◽  
State Of The Art ◽  
Concrete Structures ◽  
Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Promising Alternative ◽  
Frp Composites ◽  
Structural Problems ◽  
Concrete Elements

Fiber reinforced polymers (FRPs) are considered to be a promising alternative to steel reinforcement, especially in concrete structures subjected to an aggressive environment or to the effects of electromagnetic fields. Although attempts to develop effective reinforcement have been followed, the application of FRPs remains limited by the solution to simple structural problems that mainly appear due to the absence of design codes, significant variation in the material properties of FRP composites and limited knowledge gained by engineers as regards the application aspects of FRP composites and structural mechanics of concrete elements reinforced with FRPs. To fill the latter gap, the current state-of-the-art report is dedicated to present recent achievements in FRPs applying practice to a broad engineers’ community. The report also revises the manufacturing process, material properties, the application area and design peculiarities of concrete elements reinforced with FRP composites. Along the focus on internal reinforcement, the paper overviews recent practices of applying FRP reinforced concrete (RC) elements in structural engineering. The review highlights the main problems restricting the application of FRPs in building industry and reveals the problematic issues (related to the material properties of the FRP) important for designing RC following the formulation of targets for further research.

Mesure des propriétés diélectriques du béton par une large sonde coaxiale à terminaison ouverte

2006 ◽  
Vol 84 (5) ◽  
pp. 365-379 ◽  
Author(s):  
Bilal Filali ◽  
Jamal-Eddine Rhazi ◽  
Gérard Ballivy
Keyword(s):  
Statistical Analysis ◽  
Dielectric Properties ◽  
Water Content ◽  
Frequency Domain ◽  
Concrete Structures ◽  
Heterogeneous Materials ◽  
20 Nm ◽  
Nondestructive Measurements ◽  
Granite Samples ◽  
Coaxial Probe

We present nondestructive measurements of dielectric properties of concrete and mortar. The measures are made using a coaxial probe with a 32.5 mm open end, engineered specially for this work. The frequency domain goes from 100 to 900 MHz and includes frequently found frequencies in radars used for the auscultation of concrete structures. The probe was calibrated, and the measures were validated successfully on two solutions of different salinity, as well as on limestone and granite samples. Measures were also carried out on two mortars and six concretes of different recipes. We studied the effect of porosity and water content on the measures. The statistical analysis of the results indicates thatthe dispersion of measurements on these heterogeneous materials (granulometry from 5 to 20 nm) is comparable to that observed in limestone and granite. Our results confirm those from other authors who used more complicated techniques.[Traduit par la Rédaction]

scholarly journals The effects of the printing direction and UV artificial degradation on the mechanical properties using AM PolyJet technology

2021 ◽  
Author(s):  
Martin Matušú ◽  
David Blaha ◽  
Petr David ◽  
Zdeněk Padovec ◽  
Pavel Růžička ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Statistical Analysis ◽  
Material Properties ◽  
Compression Testing ◽  
Uv Exposure ◽  
Uv Degradation ◽  
Tension And Compression ◽  
Printing Direction

This study addresses differences in the material properties due to the influence of the printing direction, UV degradation and the use of differently coloured materials. The specimens were manufactured employing PolyJet technology from the Vero material (VeroBlue, VeroYellow, VeroMagenta). Subsequently, the specimens were subjected to tension and compression testing. Ageing is simulated via the exposure of the specimens to solar UVA and UVB for 15 and 30 days (the calculated daylight UV exposure for half a year and a whole year, respectively). The differences in the material properties were also determined according to the types of material. The results were then subjected to a statistical analysis.

scholarly journals Natural Transformations in Statistics

2015 ◽  
Vol 6 ◽  
pp. 1-5 ◽  
Author(s):  
Gennadii V. Kondratiev
Keyword(s):  
Statistical Analysis ◽  
Empirical Data ◽  
Category Theory ◽  
Probabilistic Approach ◽  
Model Error ◽  
Natural Approach ◽  
Natural Transformations

The old idea of internal uniform regularity of empirical data is discussed within the framework of category theory. A new concept and technique of statistical analysis is being introduced. It is independent on and fully compatible with the classical probabilistic approach. The absence of the model in the natural approach to statistics eliminates the model error and allows to use it in all areas with poor models. The existing error is fully determined by incompleteness of the data. It is always uniformly small by the construction of the data extension.

Fuzzy uncertainty and its applications in reinforced concrete structures

2020 ◽  
Vol 18 (5) ◽  
pp. 1175-1191
Author(s):  
Utino Worabo Woju ◽  
A.S. Balu
Keyword(s):  
Reinforced Concrete ◽  
Material Properties ◽  
Concrete Structure ◽  
Concrete Structures ◽  
Fuzzy Relation ◽  
Reinforced Concrete Structures ◽  
Reinforced Concrete Structure ◽  
Intermediate Grades ◽  
Content Type ◽  
Degree Of Membership

Purpose The aim of this paper is mainly to handle the fuzzy uncertainties present in structures appropriately. In general, uncertainties of variables are classified as aleatory and epistemic. The different sources of uncertainties in reinforced concrete structures include the randomness, mathematical models, physical models, environmental factors and gross errors. The effects of imprecise data in reinforced concrete structures are studied here by using fuzzy concepts. The aim of this paper is mainly to handle the uncertainties of variables with unclear boundaries. Design/methodology/approach To achieve the intended objective, the reinforced concrete beam subjected to flexure and shear was designed as per Euro Code (EC2). Then, different design parameters such as corrosion parameters, material properties and empirical expressions of time-dependent material properties were identified through a thorough literature review. Findings The fuzziness of variables was identified, and their membership functions were generated by using the heuristic method and drawn by MATLAB R2018a software. In addition to the identification of fuzziness of variables, the study further extended to design optimization of reinforced concrete structure by using fuzzy relation and fuzzy composition. Originality/value In the design codes of the concrete structure, the concrete grades such as C16/20, C20/25, C25/30, C30/37 and so on are provided and being adopted for design in which the intermediate grades are not considered, but using fuzzy concepts the intermediate grades of concrete can be recognized by their respective degree of membership. In the design of reinforced concrete structure using fuzzy relation and composition methods, the optimum design is considered when the degree of membership tends to unity. In addition to design optimization, the level of structural performance evaluation can also be carried out by using fuzzy concepts.

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