Abstract
Wide beams are one of the widely used structural elements in RC buildings due to the many special features that characterize them. The main objective of this research is to investigate the behavior of wide shallow beams under the effect of eccentric loading acting along their cross sections. To achieve that, an experimental program that consisted of seven wide beams was conducted. All beams were loaded using two concentrated loads at their middle third where the main parameters considered were: the magnitude of the load eccentricity, the longitudinal spacing between shear reinforcement, and the arrangement of the longitudinal reinforcement. Following that, a finite element analysis was performed where the analytical model used was first verified using the data from the experimental program. The results from both the experimental and analytical programs were in good agreement. Then, the finite element analysis was extended through a parametric study where other variables were studies such as the compressive strength of concrete, the transverse spacing between stirrups and the longitudinal reinforcement ratio. The results showed that the value of the load eccentricity, spacing between shear reinforcement, the arrangement of the main reinforcement along the beam cross section, and the compressive strength of concrete significantly affected the torsional resistance of shallow wide beams. Conclusions and recommendations are presented which can be useful for future researchers. Doi: 10.28991/cej-2021-03091766 Full Text: PDF
Highlights
Using wide shallow beams presents a good solution for many architectural obstructions as it provides a better height clearance and more simplicity for internal partitioning, this is in addition to removing the potential obstacles in the way of electromechanical ductworks
The results showed that the vertical stirrups have a great contribution to the shear strength, ductility, and width of shear cracks
In the finite element analysis, first the seven specimens tested before were modeled for verification of the soundness of the modeling procedure used and a parametric study was conducted to further understand the behavior of the wide beams in under eccentric loading
Summary
Using wide shallow beams presents a good solution for many architectural obstructions as it provides a better height clearance and more simplicity for internal partitioning, this is in addition to removing the potential obstacles in the way of electromechanical ductworks. Kamal [3] studied the effect of shear reinforcement through three different parameters which are the volumetric ratio of vertical stirrups, concrete compressive strength, and beam width. Sherwood et al [12] conducted an experimental program to study the validity of the ACI-05 [13] recommendations They stated that “the width of a member does not significantly affect the shear stress at failure and that the ACI 318-05 [13] provisions requiring different shear capacities for slabs, wide beams, and narrow beams are not appropriate.”. Kim et al [20] studied the effect of using stirrups with high strength reinforcement to resist torsional stresses in beams They concluded that using high strength reinforcement in this case leads to lower capacity than the design values. They tried to simulate the behavior of the beams under these stresses through an analytical model and comparison with previous experimental data
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
