Blast performance of reinforced concrete hollow core slabs in combination with fire: Numerical and experimental assessment

2013 ◽  
Vol 57 ◽  
pp. 69-82 ◽  
Author(s):  
Dimitrios Kakogiannis ◽  
Fermín Pascualena ◽  
Bruno Reymen ◽  
Lincy Pyl ◽  
Jean Marie Ndambi ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Hollow Core ◽  
Experimental Assessment ◽  
Blast Performance

DEFORMATION AND CRACKING OF THE PLATFORM JOINT OF THE PREFABRICATED-MONOLITHICRC BUILDING FRAME

2020 ◽  
Vol 90 (4) ◽  
pp. 38-47
Author(s):  
VL.I. KOLCHUNOV ◽  
◽  
D.V. MARTYNENKO ◽  
Keyword(s):  
Reinforced Concrete ◽  
Plane Stress State ◽  
Hollow Core ◽  
Finite Element Scheme ◽  
Element Scheme ◽  
Joint Structure ◽  
Numerical Studies ◽  
Distributed Load ◽  
Different Types ◽  
Design Characteristics

A computational model and the results of numerical studies of the structure of a platform joint in a reinforced concrete precast-monolithic frame of a building from panel-frame elements of industrial production are presented. Modeling of the plane stress state of the joint structure is carried out by a finite element scheme, using finite elements of different types and a nonlinear law of deformation to determine the design characteristics of reinforced concrete. The parameters of deformation of the platform joint structure at different loading levels, including stage-by-stage cracking and destruction, have been determined. The schemes of distribution and stress concentration zones in the characteristic sections of the platform joint are established when the distributed load is transferred from the frame of the panel-frame to the hollow-core floor panels and concrete for embedding the joint in the presence of a cavity in the frame frame for centering elements.

Influence of the Fire Temperature Regime on the Fire-Retardant Ability of Reinforced-Concrete Floors Coating

2020 ◽  
Vol 1006 ◽  
pp. 87-92
Author(s):  
Andrii Kovalov ◽  
Yurii Otrosh ◽  
Oleg Semkiv ◽  
Volodymyr Konoval ◽  
Oleksandr Chernenko
Keyword(s):  
Reinforced Concrete ◽  
Fire Resistance ◽  
Temperature Regime ◽  
Fire Retardant ◽  
Protective Layer ◽  
Fire Regimes ◽  
Hollow Core ◽  
Standard Temperature ◽  
Concrete Floor

In the paper, the tests have been analysed for fire-resistant quality of the hollow-core reinforced-concrete floors with fire-retardant plaster covering under standard temperature regime of the fire. Using the methodology for determining the characteristics of fire-retardant coatings ability for reinforced-concrete floors, the dependences have been obtained of the fire-retardant coating thickness from the concrete protective layer of a hollow-core reinforced-concrete floor for a fire resistance limit of 180 minutes with a temperature regime of hydrocarbon fire and a tunnel curve according to the Netherlands standards (RWS). It has been concluded about the minimum required thickness of the studied fire-retardant coating to provide the required fire resistance limit of a hollow-core reinforced-concrete floor under the indicated fire regimes.

NEW ARRANGEMENT FOR REINFORCEMENT OF HOLLOW CORE PANEL OF BUILDING FLOOR

2014 ◽  
Vol 4 (2) ◽  
pp. 86-93
Author(s):  
Nikolay Alekseevich ILYIN ◽  
Denis Aleksandrovich PANFILOV ◽  
Aleksandr Petrovich SHEPELEV
Keyword(s):  
Reinforced Concrete ◽  
Hollow Core

The proposed device is referred to building sphere. Its oriented to strengthening of reinforced concrete hollow fl oor slab, damaged due to diff erent reasons including fi re or technological accident. Possible results of this device using are: signifi cant increase of strength and rigidity of fl oor slabs; signifi cant increase of real fi re-resistance of slabs; smooth unloading of damaged slab; regulation of unloading amount of reinforced slab. This proposed device is simple in design, its characterized by economy in using, negligeable restraint of operating envelope in altitude. Strengthening of reinforced fl oor slab does not require starting dimensions changes; steel is economize in mass and cut because of more strength reinforcement rods. Labor is saving.

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