Name: CAROLINE RAINHA BUBACH
Type: MSc dissertation
Publication date: 05/09/2016
Advisor:
Name |
Role |
|---|---|
| MACKSUEL SOARES DE AZEVEDO | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| MACKSUEL SOARES DE AZEVEDO | Advisor * |
| WALNÓRIO GRAÇA FERREIRA | Internal Examiner * |
Summary: The performance of a steel column in fire is highly influenced by its interaction with the
beams, slabs and columns of the surrounding structure, because the different thermal strains
developed between the heating elements and the elements that remain rela
tively cold develop
axial and rotational restraints in the column that modify its critical temperature and fire
resistance.
Studies of the influence of axial and rotational restraints on the fire resistance of
steel columns are
recent and
most of the resea
rch
carried out
only considered the influence of
axial restraint,
without taking into account the rotational
restraint.
This study aims to analyze
the behavior of I section
steel columns in fire
with axial and rotational restraint, in isolation
and acting
simultaneously. The influence of the slenderness of the column, the load level and
axial and rotational restraint ratio were analyzed
numerically
using
the finite element program
ANSYS
v17.0
. The main results were that the two
re
straints, the axial and rot
ational
,
have
opposite
effects on the fire resistance of the
columns
and the larger the load level and
slenderness, lower fire resistance. The critical
times
and critical temperature
values
numerically obtained were compared with the formulation of the
ABN
T
NBR 14323: 2013.
