Title:
Seismic Effect of Reinforcement around Circular Opening in Reinforced Concrete Beam (Open Source)
Author(s):
Koshiro Nishimura and Sujan Pradhan
Publication:
Structural Journal
Volume:
121
Issue:
4
Appears on pages(s):
237-248
Keywords:
crack control; opening; reinforced concrete (RC) beam; shear capacity; upper-bound theorem
DOI:
10.14359/51740576
Date:
7/1/2024
Abstract:
In this study, five reinforced concrete (RC) beam specimens with
transverse web openings and one specimen without openings were
prepared. Diagonal steel bars were arranged around the web openings in the beam specimens so as not to fail at the section with the openings. The specimens were subjected to static reversed-cyclic
shear loading of double curvature, and those specimens failed in
shear at a different part than the section with the web openings.
This paper provides a simple model of the relationship between
stress in the diagonal reinforcement around the openings and the
applied shear load considering the shrinkage of concrete. Moreover,
an evaluation method of the ultimate shear capacity of the
beam using the upper-bound solution of the limit analysis was
also provided. These models showed good agreement with the test
results. The study contributes to the crack control and safety of RC
beams with openings.