Search for optimal parameters of fiber reinforced concrete plate on the elastic foundation

Authors

  • A. E. Guslysta Ph.D, Ass. Prof., Ukraine
  • V. V. Kolokhov Ph.D, Ass. Prof., Ukraine
  • D. S. Yaroshenko Ph.D., Ukraine

Keywords:

steel fibre reinforced concrete (SFRC), industrial floors, fiber reinforcement ratio, optimization, plate on the elastic foundation

Abstract

Annotation. . Fibre reinforced concrete has been successfully used in Civil Engineering applications: such as industrial floors, roads, airports, pile supported floors, hydraulic structures, foundation slabs, architectural panels, precast products, shotcrete, structures in seismic regions etc. This composite material is one of the concrete of the new generation. It consists from concrete matrix and short randomly distributed fibres (steel, glass, various polymers and others.). But the strongest is steel fibre. fibre can be with curved ends or wavy for better anchoring in a concrete matrix. Fibre allows compensating such weakness of concrete as low growth resistance, high shrinkage cracking, low durability, etc. Steel fibre reinforced concrete (SFRC) has the ability of excellent tensile strength, flexural strength, shock resistance, fatigue resistance, ductility and crack arrest. So the steel fibre reinforced concrete (SFRC) is very efficient in comparison with conventional reinforced concrete. As a rule during the design SFRC industrial floor we face a problem: to determine necessary thickness of floor and fibre reinforcement ratio. However, according to national rules of design SFRC structures the main characteristics of materials depend on unknown thickness and fibre reinforcement ratio. Purpose. The purpose of the article is to develop optimal parameters algorithm for fiber reinforced concrete plate on the elastic foundation by known value of bending moment of the plate. Thickness of plate and fiber reinforcement ratio were considered as parameters. Methodology. Fiber reinforced concrete plate with ultimate bending moment 100 кН∙м was chosen for study. The formula for bending moment was transformed in such way that bending moment is a function. Findings. The diagram of the function is a surface. Each point on this surface is a possible solution of optimization problem. Equating the bending moment to maximal value and using the software Mathcad 14 we have received the line on the surface that is thickness/reinforcement ratio curve. Search for an optimum must be carrying out for the function of purpose which is the total cost of materials for 1 m2 of the floor. Originality. The new modified formula for bending moment was worked out. Thickness of plate and fiber reinforcement ratio were unknown in this formula. Practical value Proposed algorithm may be practiced during soft-ware engineering for optimization of SFRC floors.

Author Biographies

A. E. Guslysta, Ph.D, Ass. Prof.

Department of Reinforced concrete and Masonry Constructions, State Higher Education Establishment “Prydneprovs’ka State Academy of Civil Engineering and Architecture”, 24-A, Chernishevskogo str., Dnipro 49600, Ukraine, tel. +38 (0562) 47-44-17

V. V. Kolokhov, Ph.D, Ass. Prof.

Department of Building Materials, Products and Structures Technology, State Higher Educational Establishment  «Pridneprovs’ka State Academy of Civil Engineering and Architecture», 24-a, Chernishevskogo str., Dnipro 49600, Ukraine, tel. +38 (0562) 46-9376

D. S. Yaroshenko, Ph.D.

Department of Metallic, Wooden and Plastic Structures, State Higher Education Establishment “Prydneprovs’ka State Academy of Civil Engineering and Architecture”, 24-A, Chernishevskogo str., Dnipro 49600, Ukraine, tel. +38 (0562) 47-16-56

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Published

2017-08-30

Issue

Section

Innovative lifecycle technology of housing and civil, industrial and transportation purposes