scholarly journals Axial force redistribution in steel beam with thermal elongation capability increasing in fire

2013 ◽  
Vol XXX (60 (2/13)) ◽  
pp. 189-202
Author(s):  
Mariusz Maślak ◽  
◽  
Małgorzata Snela
Keyword(s):  
Axial Force ◽  
Steel Beam ◽  
In Fire

scholarly journals AXIAL FORCE AND DEFORMATION OF A RESTRAINED STEEL BEAM IN FIRE Description and validation of a simplified analytical procedure

2016 ◽  
pp. 174-193
Author(s):  
Naveed Iqbal ◽  
◽  
Tim Heistermann ◽  
Milan Veljkovic ◽  
Fernanda Lopes ◽  
...  
Keyword(s):  
Axial Force ◽  
Analytical Procedure ◽  
Steel Beam ◽  
In Fire

Fire Behaviors of Restrained RC Beams with Slab

2010 ◽  
Vol 163-167 ◽  
pp. 1445-1450
Author(s):  
Gui He Tang ◽  
Bo Wu
Keyword(s):  
Reinforced Concrete ◽  
Computer Program ◽  
Axial Force ◽  
Stiffness Ratio ◽  
Rc Beams ◽  
Slab Width ◽  
Standard Fire ◽  
Rotational Restraint ◽  
Simulation Results ◽  
In Fire

Using the computer program SAFIR, the behaviors of restrained reinforced concrete (RC) beams with slab exposed to ISO834 standard fire are analyzed. The influences of three parameters (i.e., width of slab, axial restraint stiffness ratio, and rotational restraint stiffness ratio) on the beams’ behaviors in fire are investigated. Simulation results show that: (a) the axial force in the slab is much larger than that in the beam on the whole; (b) after 0.5 hour of heating the axial force in the slab decreases gradually with an increasing of the slab width ranging from 1.0 m to 2.5 m, but the influence of the slab width ranging from 1.0 m to 2.5 m on the axial force in the beam is limited; and (c) the effect of the rotational restraint stiffness ratio on the axial force in the beam/slab is very limited, but the beam’s peak hogging moment increases gradually with an increasing of the rotational restraint stiffness ratio.

scholarly journals COMPONENT METHOD EXTENSION TO STEEL BEAM‐TO‐BEAM AND BEAM‐TO‐COLUMN KNEE JOINTS UNDER BENDING AND AXIAL FORCES

2005 ◽  
Vol 11 (3) ◽  
pp. 217-224 ◽  
Author(s):  
Kestutis Urbonas ◽  
Alfonsas Daniūnas
Keyword(s):  
Axial Force ◽  
Bending Moment ◽  
Practical Method ◽  
Knee Joints ◽  
Steel Beam ◽  
Component Method ◽  
End Plate ◽  
Axial Forces ◽  
Joint Rigidity

This paper presents an analysis of semi‐rigid beam‐to‐beam end‐plate bolted and beam‐to‐column end‐plate bolted knee joints that are subjected to bending and tension or compression axial force. Usually the influence of axial force on joint rigidity is neglected. According to EC3, the axial load, which is less than 10 % of plastic resistance of the connected member under axial force, may be disregarded in the design of joint. Actually the level of axial forces in joints of structures may be significant and has a significant influence on joint rigidity. One of the most popular practical method permitting the determination of rigidity and strength of joint is the so‐called component method. The extension of the component method for evaluating the influence of bending moment and axial force on the rigidity and strength of the joint are presented in the paper. The numerical results of calculations of rigidity and strength of beam-to-beam and beam-to-column knee joints are presented in this paper as well.

Experimental Study on Strength of Connections to Concrete Filled Tubular in Fire

2011 ◽  
Vol 299-300 ◽  
pp. 743-746
Author(s):  
Hong Jun Sun ◽  
Li Hong Zhao
Keyword(s):  
Experimental Study ◽  
Fire Protection ◽  
Failure Modes ◽  
Steel Beams ◽  
Steel Beam ◽  
Catenary Action ◽  
Tubular Columns ◽  
In Fire ◽  
Sufficient Strength ◽  
Very High

Concrete filled tubular columns are widely used all over the world, due to their significant advantages, including attractive appearance, structural efficiency, reduced column footing, fast construction and high fire resistance without external fire protection. An experimental study has been carried out on the performance of joints between steel beams and concrete filled tubular columns in simple construction under fire conditions. The failure modes of the test specimens were always in the joint regions. Therefore, if the joints are appropriately designed and protected so that they possess sufficient strength, it is possible for the steel beam to develop catenary action and survive very high temperatures even without fire protection.

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