| 引用本文: | 武胜,张厚,王伟.新型冷弯翼缘闭合构件力学性能研究[J].哈尔滨工业大学学报,2011,43(10):12.DOI:10.11918/j.issn.0367-6234.2011.10.003 |
| WU Sheng,ZHANG Hou,WANG Wei.Mechanical properties of two kinds of new cold-formed flange-closed welded section members[J].Journal of Harbin Institute of Technology,2011,43(10):12.DOI:10.11918/j.issn.0367-6234.2011.10.003 |
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| 摘要: |
| 为进一步利用空翼缘梁截面形式开展,抗弯、扭刚度大的特点,并进一步优化冷弯薄壁型钢构件的截面形式,适当改变空翼缘梁的截面构成参数,提出2种新型冷弯翼缘闭合截面.采用非线性有限元方法分析新型截面构件在轴压、弯矩和压弯荷载作用下的屈曲模式、变形特征、承载力、刚度等方面力学性能.分析表明:新型冷弯截面构件在承受轴压荷载时具有截面平均应力高、构件刚度大、弯曲变形小,板件不易局部屈曲等性能优势;在承受弯矩和压弯荷载时具有刚度大、抗弯承载力高、截面局部屈曲不易发生、相关曲线饱满等优越的力学性能.新型翼缘闭合截面构件适于合理推广应用于实际工程. |
| 关键词: 空翼缘梁 冷弯钢构件 有限元分析 力学性能 |
| DOI：10.11918/j.issn.0367-6234.2011.10.003 |
| 分类号:TU392.1 |
| 基金项目:国家自然科学基金资助项目(51008054);中央高校基本科研业务专项基金项目(DL09BB12);中国博士后科学基金项目(20100471120) |
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| Mechanical properties of two kinds of new cold-formed flange-closed welded section members |
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WU Sheng, ZHANG Hou, WANG Wei
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| Abstract: |
| The hollow flange beam (HFB) is a particular cross section with two torsion rigid closed triangularflanges and a comparatively flexible web, and it is a type of high efficient cross section. This paper presentstwo kinds of new cold-formed flange-closed welded sections named HF1 and HF2 through change the sectioncomponent and parameters of HFB. Based on the precise finite element model, nonlinear finite elementmethod is adopted to study the static behaviors including buckling modes, deformed process, load carrying ca-pacity and stiffness of two new kinds of section members under axial compression, bend and component axialcompression-bend loads. The two new kinds of section members have some superior static behaviors includinghigher mean section stress and modulus of the member and have no local buckling phenomena in the elementsare proofed under axial compression, and have the well characteristic of high rigidity, high ultimate capacity,local buckling of the sections always hard to occur and correlation curves replete under bend and componentaxial compression-bend loads, too. The new cold-formed flange-closed welded section members can go deepinto the experiment study as to be used in the practical engineering. |
| Key words: hollow flange beam cold-formed steel members finite element analysis mechanical properties |
