Research on bending-torsional behaviors of steel-concrete composite beam with corrugated steel webs

• Published in: Journal of Hebei University of Science and Technology Vol. 43; no. 1; pp. 99 - 109
• Main Authors: Yunsheng LI, Mengbiao LI, Yaping WANG, Yanling ZHANG
• Format: Journal Article
• Language: Chinese
• Published: Hebei University of Science and Technology 01.02.2022
• Subjects: composite structure; steel-concrete composite beam with corrugated steel webs; bending-torsional behavior; cracking load; ultimate load
• ISSN: 1008-1542

To further reveal the cracking mechanism and the bending-torsional failure mode caused by the bending-torsional behaviors of the steel-concrete composite beam with corrugated steel webs,model experiments were conducted on five test beams under the combined bending-torsional load.Combined with ANSYS finite element analysis,reduction factors for both the cracking bending moment and torsional moment were proposed,and the bending-torsional correlation formula between the ultimate bending moment and torsional moment was suggested.The results show that,with the increase of the ratio of bending moment,the cracking torsional moment increases,while the cracking bending moment and the angle between the inclined crack and the longitudinal axis decrease gradually;the failure mode is changed from bending failure of normal section to torsional failure which is characterized by a main inclined crack and the inclined compressed concrete column reaching to the ultimate strain.When the torsional bending ratio k≤[BF]0.15[BFQ],t