Fire resistance modelling of prestressed concrete hollowcore floors using multi-spring connection elements

2010 ◽  
pp. 507-512 ◽  
Author(s):  
J-K Min ◽  
P Moss ◽  
R Dhakal ◽  
A Buchanan
Keyword(s):  
Fire Resistance ◽  
Prestressed Concrete

scholarly journals Optimal design of prestressed concrete hollow core slabs taking into account its fire resistance

2018 ◽  
Vol 122 ◽  
pp. 81-92 ◽  
Author(s):  
V. Albero ◽  
H. Saura ◽  
A. Hospitaler ◽  
J.M. Montalvà ◽  
Manuel L. Romero
Keyword(s):  
Optimal Design ◽  
Fire Resistance ◽  
Prestressed Concrete ◽  
Hollow Core

Performance of prestressed concrete box bridge girders under hydrocarbon fire exposure

2020 ◽  
Vol 23 (8) ◽  
pp. 1521-1533 ◽  
Author(s):  
Chaojie Song ◽  
Gang Zhang ◽  
Wei Hou ◽  
Shuanhai He
Keyword(s):  
Fire Resistance ◽  
Prestressed Concrete ◽  
Load Level ◽  
Concrete Cover ◽  
Bridge Girders ◽  
Fire Exposure ◽  
Bridge Girder ◽  
Prestressing Strands ◽  
Cover Thickness ◽  
Exposure Length

This article presents an approach for investigating performance of prestressed concrete box bridge girders under hydrocarbon fire exposure. A three-dimensional nonlinear finite element model, developed in computer program ANSYS, is utilized to analyze the response of prestressed concrete box bridge girders under combined effects of fire exposure duration and simultaneous structural loading. The model validation is performed using a scaled prestressed concrete box girder exposed to ISO834 fire in furnace. Subsequently, the validated model is used to investigate fire performance of prestressed concrete box bridge girders through taking into consideration some variables, namely concrete cover thickness to prestressing strands, prestress degree, load level, fire exposure length, and position. Through a case study, results from numerical analysis show that concrete cover thickness to prestressing strands and load level has significant effect on fire resistance of prestressed concrete box bridge girders. Increasing prestress degree in prestressing strands can speed up the progression of deflection (sudden collapse) in prestressed concrete box bridge girder toward the final fire exposure stage. Reducing fire exposure length or preventing fire exposure on mid-span zone can highly enhance the fire resistance of simply supported prestressed concrete box bridge girders. Failure of prestressed concrete box bridge girder, under hydrocarbon fire exposure conditions, is governed by rate of deflection failure criterion in particular cases.

scholarly journals Fire resistance tests on thin CFRP prestressed concrete slabs

2015 ◽  
Vol 101 ◽  
pp. 558-571 ◽  
Author(s):  
Cristian Maluk ◽  
Giovanni Pietro Terrasi ◽  
Luke Bisby ◽  
Alex Stutz ◽  
Erich Hugi
Keyword(s):  
Fire Resistance ◽  
Prestressed Concrete ◽  
Concrete Slabs ◽  
Resistance Tests
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