Shear resistance of prestressed hollow core floors exposed to fire

2003 ◽  
Vol 4 (2) ◽  
pp. 65-74 ◽  
Author(s):  
A. Van Acker
Keyword(s):  
Shear Resistance ◽  
Hollow Core

Effect of polypropylene and steel fibers on web-shear resistance of deep concrete hollow-core slabs

2020 ◽  
Vol 210 ◽  
pp. 110273
Author(s):  
Hang T.N. Nguyen ◽  
Kang Hai Tan ◽  
Tetsushi Kanda
Keyword(s):  
Shear Resistance ◽  
Steel Fibers ◽  
Hollow Core

scholarly journals Analytical model for determining the influence of support flexibility on shear capacity of hollow core slabs

2019 ◽  
Vol 262 ◽  
pp. 08005 ◽  
Author(s):  
Mateusz Surma ◽  
Wit Derkowski ◽  
Andrzej Cholewicki
Keyword(s):  
Prestressed Concrete ◽  
Model Development ◽  
Simple Calculation ◽  
Shear Resistance ◽  
Shear Capacity ◽  
Beam Model ◽  
Hollow Core ◽  
Engineering Analysis ◽  
Flexible Supports ◽  
German Model

The paper presents the authors’ model of calculating the shear capacity of prestressed concrete hollow core slabs in Slim Floor structures, the theoretical basis of which is Cholewicki’s two-beam model and the Finnish model by Pajari and Leskelӓ. The purpose of the model development was to find an alternative method for determining the horizontal tangential stress τzx which occurrence is decisive for reducing the shear resistance of channel slabs based on flexible supports. The model gives intermediate results between the Finnish model and the German model by Hegger and Roggendorf, which seems to be desirable, taking into account the conservative character of the Finnish model. The authors’ model is the first attempt to date at analytical consideration of the effect of web flexibility which may be important to maintaining an adequate capacity of the slab. In other models, the webs are treated as a rigid system, connecting the horizontal flanges of the slab. The model is a simple calculation tool, available to Slim Floor designers for an engineering analysis.

Fire tests of hollow-core specimens with and without roof insulation

PCI Journal ◽  
1976 ◽  
Vol 21 (1) ◽  
pp. 40-49 ◽  
Author(s):  
Melvin S. Abrams
Keyword(s):  
Fire Tests ◽  
Hollow Core

How to Protect Hollow-Core Slabs in Parking Structures from Deicing Salts

PCI Journal ◽  
2018 ◽  
Vol 63 (2) ◽  
Author(s):  
Dominic Lemieux ◽  
Chad Van Kampen
Keyword(s):  
Hollow Core ◽  
Deicing Salts

Tests on Special Reinforcement for the End Support of Hollow-Core Slabs

PCI Journal ◽  
1994 ◽  
Vol 39 (5) ◽  
pp. 90-105 ◽  
Author(s):  
Juan C. Mejia-McMaster ◽  
Robert Park
Keyword(s):  
Hollow Core

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.

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