Abstract
The aim of this paper is to examine the shear resistant mechanism of r/c columns with an outer shell structure consisting of a divided thin steel plate with ribs and polyethylene fiber sheets when subjected to shear force. The steel plates do not require any welding on site. This paper mainly describes the shear effectiveness achieved through the use of ribs on steel plates in extremely short columns. The test results found that the shear resistance achieved through the elements of lateral ribs, web plates and polyethylene fiber sheets, is cumulative. Based on these results, the study indicates that shear capacity can be estimated by using the design guideline for ultimate shear strength issued by AIJ in 1990, which is based on the truss and arch model.
