A Novel Rectangular-Section Combined Beam of Welded Thin-Walled H-Shape Steel/Camphor Pine Wood: The Bending Performance Study

Chang Wu (), Junwei Duan, Ziheng Yang, Zhijiang Zhao and Yegong Xu
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Chang Wu: Department of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Junwei Duan: China Construction First Construction Group Co., Ltd., Shanghai 201103, China
Ziheng Yang: Department of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Zhijiang Zhao: Department of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Yegong Xu: Department of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Sustainability, 2023, vol. 15, issue 9, 1-24

Abstract: At present, the development of green building materials is imminent. Traditional wood structures show low strength and are easy to crack. Steel structures are also prone to instability. A novel rectangular-section composite beam from the welded thin-walled H-shape steel/camphor pine was proposed in this work. The force deformation, section strain distribution law, and damage mechanism of the combined beam were studied to optimize the composite beam design, clarify the stress characteristics, present a more reasonable and more efficient cross-section design, and promote green and environmental protection techniques. Furthermore, the effect of different factors such as steel yield strength, H-type steel web thickness, H-type steel web height, H-type steel flange thickness, H-type steel upper flange covered-board thickness, and combined beam width was investigated. The ABAQUS simulation with the finite element software was also performed and was verified through empirical experiments. According to the results: (1) the damage process of the composite beam was divided into three steps, namely elastic stage, elastic–plastic step, and destruction stage, and the cross-middle section strain met the flat section assumption; (2) additionally, the bond connection was reliable, the two deformations were consistent, and the effect of the combination was significant. The study of the main factors showed that an increase in the yield strength, the H-type steel web height, the steel H-beam upper flange thickness, and the combined beam width caused a significant enhancement in the bending bearing capacity. The combined beam led to high bending stiffness, high bending bearing capacity, and good ductility under bending.

Keywords: composite beam; material performance test; bending performance; theoretical analysis; numerical simulation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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