Experimental evaluation of torsional behavior, which is possible behavior of seismic beams of RC structures, was carried out. Concrete strength and stirrup spacing were set as experimental variables to investigate the torsional strength of RC beams. Based on the experimental results, the torsional strength of RC beams was compared and analyzed. From the experimental results, the concrete strength was caused a difference of about 30% in the torsional strength of the maximum torque of the RC beam specimen, and the stirrup spacing was found to be about 2.8 times and 5 times that of the peak torque. Therefore, this study will be an important study to understand the effect of both concrete strength and stirrup spacing for the torsional strength or torsional behavior of RC beams.

• 권민호(경상대학교 토목공학과, 공학연구원, 교수) | Kwon, Min-Ho (Professor, Department of Civil Engineering, ERI, Gyeongsang National University)
• 서현수(텍사스 주립대학교 알링턴 캠퍼스, 박사 후 연구원) | Seo, Hyun-Su (Ph. D., Department of Civil Engineering, University of Texas at Arlington)
• 임정희(경상대학교 토목공학과, 공학연구원, 박사수료) | Lim, Jeong-Hee (Ph. D., Candidate, Department of Civil Engineering, Gyeongsang National University)
• 김진섭(경상대학교 토목공학과, 공학연구원, 조교수) | Kim, Jin-Sup (Assistant Professor, Department of Civil Engineering, ERI, Gyeongsang National University) Corresponding author