森林工程2026，Vol.42Issue(1)：90-102,13.DOI:10.7525/j.issn.1006-8023.2026.01.009
秸秆-冷弯薄壁型钢组合梁抗弯性能有限元分析
Finite Element Analysis of Bending Performance of Straw-Cold-Formed Thin-Walled Steel Combined Beam
摘要
Abstract
Taking cold-formed thin-walled steel and straw board as the main materials,a new type of box-section straw-cold-formed thin-walled steel combined beam was constructed by using the connection method of straw board wrapped with cold-formed thin-walled steel.The finite element software ABAQUS was used to establish 7 groups of 25 combined beam models to analyze the effects of connection method,straw board thickness,steel thickness,steel height,web bolt rows,web bolt spacing and beam span on the flexural performance of the combined beams,and to explore the damage modes and damage mechanisms of the combined beams in the case of flexural damage.The results showed that the lower flange of the straw board reached the tensile strength before the upper flange in the finite element simulation loading pro-cess,which led to bending cracks and bending damage in the mid-span region of the combined beam,and the lower flange of the straw board underwent localized compression bending and conformal shear damage in the process of load in-crease.Each parameter had a different degree of influence on the flexural performance of the combined beams,among which the thickness of the straw board,the thickness of the steel and the height of the steel had the most significant influ-ence on the flexural performance.The optimum combination parameters of the combined beams were as follows,with high bending load capacity and small deflection deformation,using adhesive connection,48 mm thickness of straw board,2.5 mm thickness of steel,and 200 mm height of steel.The web bolts were arranged in two rows with a spacing of 150 mm,and the overall span was 1800 mm,which was verified to be in line with the expectation by the test.The combination of cold-formed thin-walled steel and straw board can effectively utilize their respective advantages and sig-nificantly improve the flexural load capacity of the combined beam.关键词
组合梁/秸秆板/冷弯薄壁型钢/抗弯性能/有限元分析Key words
Combined beam/straw board/cold-formed thin-walled steel section/bending performance/finite element analysis分类
建筑与水利引用本文复制引用
胡宜,刘靖依,郝向炜,杨玉莹,孟作权,杨海旭..秸秆-冷弯薄壁型钢组合梁抗弯性能有限元分析[J].森林工程,2026,42(1):90-102,13.基金项目
宁夏回族自治区重点研发计划项目(2024FRD05109) （2024FRD05109）
大学生创新创业训练计划项目(202410225269). （202410225269）
