Title: Effect of vertical circular openings on flexural strength of reinforced concrete beam // Magazine of Civil Engineering. – 2021. – С. 10601
Creators: Auta S. M.; Jamiu O.; Alhaji B.
Imprint: 2021
Collection: Общая коллекция
Subjects: Строительство; Строительная механика; reinforced concrete beams; beams with holes; beam bends; beam strength; vertical round holes; computer simulation; железобетонные балки; балки с отверстиями; изгибы балок; прочность балок; вертикальные круглые отверстия; компьютерное моделирование
UDC: 624.04
LBC: 38.112
Document type: Article, report
File type: PDF
Language: English
DOI: 10.34910/MCE.106.1
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)
Record key: 0d00d3e0-26a2-4bcc-a496-2823476b0e7e

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Modern building construction techniques sometimes involve the passing of pipes or ducts for water supply, electrification, and telecommunication through reinforced concrete beams to protect them against mechanical damages and add aesthetic value to buildings. This study looks into the effect of vertical circular openings on the flexural strength of the reinforced concrete beam. Two (2) sets of beam samples were investigated during this study: computer simulated reinforced concrete (RC) beam using ANSYS 19.1 and laboratory cast. The results of the flexural strength test conducted show the following: Reinforced concrete beam with vertical circular openings of diameter greater than 33.3 % of beam width (B) reduced its flexural strength by at least 20 %; maximum compressive stress of concrete occurs at the openings region of the beam; the difference in ultimate load capacity of finite element (FE) beam models and experimental beam specimen is 3.5 %. It can be deduced that ANSYS software is an appropriate finite element (FE) tool to predict the behaviour of RC beams. Hence, it is hereby recommended that the diameter of the vertical circular opening in RC beam should not exceed 33.3 % of the beam width and its location from beam support should not exceed L/6.

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Table of Contents

  • Effect of vertical circular openings on flexural strength of reinforced concrete beam
    • 1. Introduction
    • 2. Materials and Method
      • 2.1. Description of specimen
      • 2.2. Laboratory investigation
      • 2.3. Computer modeled beam specimen
    • 3. Results and Discussion
      • 3.1. Flexural strength
      • 3.2. Stresses at Ultimate Load for ANSYS Beam Specimens
      • 3.3. Comparison of Results with Reviewed Literatures
    • 4. Conclusion and Recommendations

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