Influence of web openings on the cyclic response of RC coupling beams
Osman M. O. Ramadan, Ahmed Elghool, Nasser Elshafey, Mohamed S. Elbayomy
TL;DR
This paper studies how openings in reinforced concrete coupling beams affect their structural performance under cyclic loading.
Contribution
The study introduces a computational analysis comparing different reinforcement schemes in coupling beams with and without openings.
Findings
Diagonal reinforcement in solid beams showed superior cyclic behavior compared to conventional or rhombic reinforcement.
Openings significantly reduced shear capacity and maximum chord rotation, especially when placed at mid-span.
Diagonal confinement was less affected by openings than other reinforcement schemes.
Abstract
The use of appropriate reinforcement detailing in reinforced concrete coupling beams is crucial, particularly for those with a short span-to-depth ratio (ln/h < 2). These beams must be designed to exhibit ductile, inelastic behavior, thereby maintaining the stability of the coupled shear wall system. In practice, openings are often required in coupling beams to accommodate utility pipes for plumbing, electrical, and other building services. However, these openings can significantly alter the structural behavior and must be accounted for in the design. Since experimental investigation of various parameters is often expensive and time-consuming, this study employs computational modeling. A set of twelve reinforced concrete coupling beams, with and without openings, were analyzed using the non-linear finite element program ABAQUS to investigate their cyclic behavior. The beams featured…
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Taxonomy
TopicsStructural Behavior of Reinforced Concrete · Seismic Performance and Analysis · Structural Load-Bearing Analysis