钢-竹组合双室箱形梁受弯性能有限元分析
Finite Element Analysis of Bending Performance of Steel-Bamboo Composite Double-Chamber Box Beams
唐政烽 1单奇峰 1童科挺 1葛玉猛 1李玉顺2
作者信息
- 1. 宁波大学土木工程与地理环境学院,浙江宁波 315211
- 2. 青岛农业大学建筑工程学院,山东青岛 266109
- 折叠
摘要
钢-竹组合双室箱形梁是由冷弯薄壁型钢与重组竹通过结构胶黏结而成的一种组合梁,两者材料共同受力、协调变形,具有优异的受弯性能.在试验研究基础上,通过ABAQUS软件进行三维建模与有限元分析,并以内聚力模型模拟材料接触面的相互作用,将模拟结果与试验结果进行对比以验证模型可靠性,并对组合梁受弯性能进行参数分析.结果表明,有限元模拟结果与试验结果失效特征相似,跨中最大挠度变化规律相近,容许挠度与试验极限荷载下挠度平均误差小于5％;增加组合梁翼缘厚度、翼缘宽度、腹板高度以及型钢厚度可以有效提升抗弯刚度及受弯承载能力;此外,在一定范围内增加腹板高度,组合梁材料利用效率更高,即每增加1 kg使用量,容许荷载和极限荷载将分别提升6.20 kN和9.34 kN.
Abstract
The steel-bamboo composite double-chamber box beam is a composite beam made of cold-formed thin-walled steel and restructured bamboo bonded through structural adhesive.The two materials jointly bear stress and coordinate deformation,and have excellent bending properties.Based on the experimental research,ABAQUS software was used to conduct three-dimensional modeling and finite element analysis,and the cohesion model was used to simulate the interaction of the material contact surface.The simulation results were compared with the test results to verify the reliability of the model,and the bending perform-ance of the composite beam was analyzed.The results showed that the failure characteristics of the finite el-ement simulation results were similar to the test results,the change pattern of the maximum deflection in the mid-span was similar,and the average error between the allowable deflection and the deflection under the test limit load was less than 5％;increase the flange thickness,flange width,web height,and the thickness of section steel of the composite beam could effectively improve the bending stiffness and bending load-bear-ing capacity;in addition,by increasing the web height within a certain range,the composite beam material utilization was higher,that is,for every 1 kg increased in usage,the allowable load and ultimate load would increase by 6.20 kN and 9.34 kN,respectively.
关键词
钢-竹组合双室箱形梁/受弯性能/内聚力模型/有限元分析/参数分析Key words
steel-bamboo composite double-chamber box beam/bending performance/cohesive force mod-el/finite element analysis/parameter analysis引用本文复制引用
基金项目
国家自然科学基金项目(51978345)
国家自然科学基金项目(52278264)
出版年
2024
NETL
NSTL
万方数据