Bending behavior of steel octagon-web beam. Issue 12 (September 2020)

• Record Type: Journal Article
• Authors: Chang, Shan; Yang, Ming; Tian, Linjie; Yuan, Pengfei
• Is Part Of: Advances in structural engineering. Volume 23:Issue 12(2020)
• Page Start: 2694
• Page End: 2708
• Publication Date: 2020-09
• Subjects: bending behavior -- deflection calculation method -- finite element -- load–deflection curve -- steel octagon-web beam; Structural engineering -- Periodicals; Construction, Technique de la; Structural engineering; Periodicals; 624.1
• DOI: 10.1177/1369433220919072
• Languages: English
• ISSNs: 1369-4332

Abstract

Due to the improvement of steel properties, many steel structures with attractive appearance emerge unceasingly. In this article, a new structure of steel octagon-web beam which has the similar appearance with honeycomb beam was presented. The mechanical characteristics of steel octagon-web beam under bending loads were analyzed theoretically. Based on the Vierendeel truss theory in deflection calculation of honeycomb beam, the deflection calculation method of steel octagon-web beam which was validated by finite element method was studied. Two parameters affecting deflection of steel octagon-web beam, such as opening type and expansion ratio, were analyzed. A scale model of steel octagon-web beam was manufactured in order to study bending behavior of the structure. The failure patterns of test specimen under four-point bending test are the buckling of deck and web. A nonlinear finite element model of test specimen whose results were compared with test was established by software ABAQUS 2017 . The stresses of slabs under ultimate load have reached yield stress, which shows steel octagon-web beam has good flexural performance.