| 矩形钢管混凝土桁架受压弦杆的计算长度 |
| |
| 引用本文： | 蔡健,陈国栋. 矩形钢管混凝土桁架受压弦杆的计算长度[J]. 钢结构, 2009, 24(4): 23-25 |
| |
| 作者姓名： | 蔡健 陈国栋 |
| |
| 作者单位： | 华南理工大学亚热带建筑国家重点实验室,广州,510640;华南理工大学亚热带建筑国家重点实验室,广州,510640 |
| |
| 基金项目： | 国家重大基础研究前期研究专项项目，国家自然科学基金 |
| |
| 摘 要： | 桁架受压弦杆受到相邻杆件的约束,其计算长度不能直接按两端铰接或两端固定杆件来取值。基于合理的假定,考虑相邻节间弦杆内力比对矩形钢管混凝土桁架受压弦杆计算长度的影响,推导出矩形钢管混凝土桁架受压弦杆屈曲的特征方程,给出相应的计算长度系数,并对不同截面的矩形钢管桁架受压弦杆进行了有限元计算。结果表明,采用计算长度系数的计算结果与有限元计算结果吻合较好,相邻弦杆的内力比对受压弦杆的计算长度影响明显,考虑相邻弦杆的内力比对计算长度的影响后,受压弦杆的计算长度系数有所减小。最后给出了便于工程应用的受压弦杆计算长度系数简化计算公式。
|
| 关 键 词： | 矩形钢管混凝土 桁架 受压弦杆 计算长度 稳定性 有限元 |
THE EFFECTIVE LENGTH OF COMPRESSIVE CHORD MEMBERS IN CONCRETE-FILLED RECTANGULAR STEEL TUBULAR TRUSS |
| |
| Cai Jian,Chen Guodong. THE EFFECTIVE LENGTH OF COMPRESSIVE CHORD MEMBERS IN CONCRETE-FILLED RECTANGULAR STEEL TUBULAR TRUSS[J]. Steel Construction, 2009, 24(4): 23-25 |
| |
| Authors: | Cai Jian Chen Guodong |
| |
| Affiliation: | State Key of Laboratory Subtropical Building Science;South China University of Technology;Guangzho u 510640;China |
| |
| Abstract: | The calculation for the effective length of the compress ive chord members in the truss can not be considered as hinged joints or fixed i n each member end,because the compressive chord members of the truss are restra ined by the contiguous ones.Based on the reasonable hypothesis,the eigenvalue equa tions of the compressive chord members in concrete-filled rectangular steel truss(CFRT) are derived by considering the effect of the internal force ratio of the contiguous chord members,whose coefficients of the... |
| |
| Keywords: | concrete-filled rectangular steel tubular truss compressive chord member effective len gth stability finite element |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
