Title: Strength, Cracking and Deformation Similitude in Reinforced T-beams Under Bending and Shear

Author(s): R. Narayan Swamy and Shamsuddin A. Queshi

Publication: Journal Proceedings

Volume: 68

Issue: 3

Appears on pages(s): 187-195

Keywords: aggregate size;cracking (fracturing);deformation;flexural strength;models; research;reinforced concrete;shear strength;simulation;size effect;stiffness; stirrups;T-beams.

DOI: 10.14359/11319

Date: 3/1/1971

Abstract:
The strength, cracking, and deformation similtude of full, one-half, and one-third scale models of reinforced concrete T-beams without and with stirrups and failing in shear and flexure is reported. The effects of aggregate size and control specimen size area are also investigated. The greater deflection and the increased strength characteristicsof models before failure is shown to be due to their increased strain capacity and the presence of a strain gradient in the compression zone. For strength and cracking similitude it is necessary to scale down the maximum aggregate size. One-third scale models consistantly show larger increases in strength. Models made from the same materials as the prototype are able to satisfactorily simulate deformation and stiffness characteristics of the prototype.