Effects of Incorporating Steel and Glass Fibers on Shear Behavior of Concrete Column-Beam Joints

• Published in: KSCE journal of civil engineering Vol. 22; no. 8; pp. 2970 - 2981
• Main Authors: Qureshi, Liaqat Ali, Muhammad, Usman
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Civil Engineers 01-08-2018; Springer Nature B.V; 대한토목학회
• Subjects: Beam-columns; Civil Engineering; Columns (structural); Concrete; Concrete columns; Concrete testing; Ductility; Engineering; Fibers; Finite element method; Geotechnical Engineering & Applied Earth Sciences; Glass; Glass fiber reinforced concretes; Glass fibers; Glass fibres; Industrial Pollution Prevention; Joints (timber); Material properties; Mathematical models; Modelling; Overcrowding; Reinforcing steels; Steel; Steel columns; Steel fibers; Stiffness; Structural behavior; Structural Engineering; Ultimate loads; 토목공학; finite element modelling; column-beam joints; fiber reinforced concrete; Steel fibers; glass fibers; crack pattern; ANSYS
• ISSN: 1226-7988; 1976-3808
• DOI: 10.1007/s12205-017-0037-8

This paper presents the effects of adding steel and glass fibers on structural behavior of concrete column-beam joints in comparison with the conventional concrete. Nine full-scaled exterior column-beam joints cast by one traditional concrete (declared as control column-beam joint), four steel fiber reinforced & four glass fiber reinforced concretes were tested under monotonic loading. Percentage of each fiber added in respective column-beam joint was varied from 0 to 2% with an increment of 0.5%. Steel fibers were added on weighted basis of concrete while glass fibers were added on the weighted percentage of cement. Results were evaluated with respect to first crack load, ultimate load, deflections and crack patterns. Finite element modeling was carried out on ANSYS version 11 by using material properties evaluated by physical testing of concrete used in the casting of joints. Results obtained from FEM and experimental program were found to be in good agreement with each other. It was also found that the incorporation of fibers in column-beam joints improved their stiffness, ductility, strength and it could be one of the likely alternate approaches for reducing the overcrowding of lateral reinforcement in column-beam joints.