Title:
Lateral Torsional Buckling of Rectangular Reinforced Concrete Beams
Author(s):
Ilker Kalkan
Publication:
Structural Journal
Volume:
111
Issue:
1
Appears on pages(s):
71-82
Keywords:
gravity load simulator; initial geometric imperfections; lateral bending rigidity; lateral stability; minor axis curvature; restrained shrinkage cracking sweep; torsional rigidity
DOI:
10.14359/51686431
Date:
1/1/2014
Abstract:
This paper reports the results of a study aimed at investigating the lateral stability of rectangular reinforced concrete slender beams. A total of nine reinforced concrete beams of rectangular cross-section with db ratios ranging from 10.20 to 12.45 and Lb ratios varying between 96 and 156 were tested. A gravity load simulator that allowed the load to remain vertical when the beam reinforcing bars placed out of plane was used for loading the beams. The test results were compared with various lateral buckling solutions in the liter¬ature and the solution developed in this study, which accounts for the inelastic and non-homogeneous nature and cracking of rein-forced concrete and the initial geometric imperfections. Tests have shown that sweep increases the lateral deformations of a concrete beam before buckling and reduces the buckling load. The proposed analytical solution was found to closely estimate the experimental buckling loads of the specimens.