الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
 |  | from | 319 |  |  |
| | | from | 319 | | |
Abstract
The design of moment connections of steel I-beams and concrete filled steel
tube (CFST) columns is not sufficiently covered in the current specifications.
The connections of CFST columns are considered a disadvantage due to the
lack of experience and labor. In this research program, both experimental and
theoretical programs were performed to study the behavior of moment
connections of steel I-beams and CFST columns. In the experimental program,
five full scale connections were tested. The connections were subjected to a
concentrated load applied at the top of the column with hinged and roller
supports and at the beam end producing bending moment at beam-to-column
connection.
A finite element model was developed to simulate the behavior of such
specimens taking into consideration nonlinear geometric and material
analyses. The modified Newton-Raphson iterative method was used and the
load was applied in increments. The results from the developed finite element
model showed a good agreement with the experimental results. Once the
validity of this model was verified, it was used to conduct wide range
parametric studies. In the first part, the effects of column cross section shape
(square or circular) as well as different stiffener configurations were studied.
In the second part, the effect of column stiffener dimensions, filling the
column with concrete as well as column cross section dimensions and shape
are studied.
Different proposed design equations, based on the results developed
from the analytical and experimental studies were proposed. The ultimate
moment capacities of such connections computed using the proposed design
equations were compared to those obtained analytically from this study and from design guides. The comparison showed a good agreement with the
results.