Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Web Opening


Effect of Web Opening on the Ultimate Capacity of Steel Plate Girders under Two Points Load

Mazin A. Al-Mazini

Engineering and Technology Journal, 2016, Volume 34, Issue 1, Pages 165-177

The structural behavior of steel plate girders with web opening is investigated in this study. An experimental and theoretical investigation of plate girders with circle and square openings in the web was conducted. The experimental work included testing of seven plate girder specimens under two point loads. Three specimens were tested to observe the influence of the circular web opening. The influence of the presence of square web openings was studied by testing other three specimens. The last one was tested without opening as a reference (control) specimen. These specimens had the same dimensions. The experimental results showed that the ultimate load capacity of the girders decreases with increasing the opening size, and the position of plastic hinge depends on the size of hole.
Three-dimensional nonlinear finite element analysis has been used to conduct the numerical investigation of the structural behavior of plate girders with web opening. ANSYS (version 12.0) computer program was used in this study. Four- nodes shell element (SHELL 181) was used to represent the steel plate. The proposed finite element model has been used to carry out a parametric study to investigate the effects of two parameters; web slenderness and flange stiffness ratios, on the ultimate load capacity of plate girders with circular web openings.

Improving the Strength of Steel Perforated Plate Girders Loaded in Shear Using CFRP laminates

May J. Hamoodi; Waeel Sh.Abdul-Sahib; Ihsan K.Abed

Engineering and Technology Journal, 2015, Volume 33, Issue 9, Pages 2119-2129

The structural behavior of perforated composite web plate girders under shear loading is studied. Five steel plate girders have been tested. Two of them are reference girders, not perforated and perforated. The perforated webs in the three other girders are strengthened with carbon fiber reinforced polymer (CFRP) laminates in different patterns. The diameter of the central circle opening is 300 mm, where is 60% of the web depth. It is found from the experimental work that the ultimate shear load for the perforated composite web plate girder is higher than the reference perforated girder in a range of 100% to 134% depending on the orientation of the fiber in CFRP laminates. Through the experimental results, new formulas are presented to predict the ultimate shear load of perforated strengthened steel girders by CFRP laminates. A nonlinear finite element analysis is carried out for the tested plate girders using the package software program (ANSYS V.14.5). The analytical results contain the distribution of VonMises stresses, which is useful to have a better understanding to the results obtained from the experimental tests.

Behavior of Steel Plate Girders with Web Openings Loaded in Shear

May J. Hamoodi; Marwa S. Abdul Gabar

Engineering and Technology Journal, 2013, Volume 31, Issue 15, Pages 2982-2996

The structural behavior of three steel plate girders under shear is studied. The first
one is the reference plate girder (G) which is prepared without web openings, and the
second one (GO) is fabricated to contain circular opening at the center of each web panel,
the diameter of the opening is 60% of the web depth, while the third plate girder (GOR)
is with reinforced strip welded around the circular web openings. The aspect ratio of the
panels is one and they all have the same dimensions. The experimental results obtained
from second and third plate girders have been compared with those obtained from the
reference plate girder. The comparison indicates that the reduction in the ultimate shear
load for plate girder with web opening is 51% and for the plate girder with reinforced
web opening is 35%. Also through the experimental results, new formulas are presented
to predict the ultimate shear load of perforated steel girders with large openings.
A nonlinear finite element analysis is carried out for the tested plate girders using the
package software program (ANSYS V.11). The analytical results contain the ultimate
shear capacity and Von Mises stress distribution. The results of finite element models are
compared with results of experimental tests. The difference in ultimate shear load was
10%, 9% and 1.5% for plate girders GO, GOR and G, respectively. Also a parametric
study with varying size of the reinforcement around the web openings is performed by
using the ANSYS program, and it is found that the thickness of the reinforcement strip
has higher effect than its width on the ultimate shear capacity of perforated plate girder.

Tests of Composite Beams with Web Openings

May J. Hamoodi; Waleed Kh. Hadi

Engineering and Technology Journal, 2011, Volume 29, Issue 10, Pages 2073-2086

The aim of this study is to investigate experimentally the structural
behavior of simply supported composite beams, in which a concrete slab is connected together with a steel I-beam by means of headed stud shear
connectors under the presence of web openings. Six composite beams with
constant degree of interaction were tested under central concentrated static load. One of the beams is constructed without web opening while the others contain various number, location and shape of openings. Deflection at midspan and at the ends of each opening were observed versus load. The experimental results show that the web openings decrease the strength of composite beams in the range of 19% to 24% for the tested specimens. Distinctive effects for the location, number and shape of openings took place after initiation of section yielding. Different patterns of cracks at concrete slab were observed.