大跨结构异型构件设计
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赵鹏飞 (中国建筑科学研究院,北京 100013)
[摘要]异型截面目前在大跨结构中被广泛使用,如何科学合理地对其进行设计已是一个很现实的问题。首先对异型截面进行了分类。在《钢结构设计规范》(GB 50017—2003)对此没有明确规定的情况下,在研究规范相应公式来历的基础上,通过参考、套用规范公式并辅以有限元分析的方式,以封闭截面为对象,研究此类构件验算问题。涉及强度、弯矩作用平面内整体稳定、弯矩作用平面外整体稳定、局部稳定等各方面的内容。[关键词]大跨结构;异型截面;强度;整体稳定;局部稳定中图分类号:TU318.1 文献标识码:A 文章编号:1002-848X(2013)02-0036-05Design on elements with irregular sections in large span structuresZhao Pengfei(China Academy of Building Research, Beijing 100013, China)Abstract: Due to the widespread use of the elements with irregular sections in large span structures, how to design such elements is becoming a problem needed to be solved. The irregular sections were classified at first. Based on the research of the corresponding formulas in Code for design of steel structures GB 50017—2003, how to check irregular closed sections was studied. By referencing these formulas with FEA analysis, the following problems were discussed, such as strength, out of plane and in plane overall stability under moments, local buckling and etc.Keywords: large span structure; irregular section; strength; overall stability; local buckling参考文献[1] GB 50017—2003 钢结构设计规范[S].北京:中国计划出版社,2003.[2] 赵鹏飞,董城, 刘明,等.采用变截面箱梁的单层网壳屋盖结构在天津西站的应用[C]//第13届空间结构学术会议论文集.2010.[3] 赵鹏飞,EMMANUEL LIVADIOTTI,阳升,等. 青岛北站站房屋盖结构体系研究[J]. 建筑结构学报,2011,32(8):10-17.[4] 崔佳, 魏明钟,赵熙元,等.钢结构设计规范理解与应用[M].北京:中国建筑工业出版社,2004.[5] 李开禧,肖允徽. 逆算单元长度法计算单轴失稳时钢压杆的临界力[J]. 重庆建工学院学报,1982,8(4):31-37.[6] 李开禧, 魏明钟. 钢构件稳定[M]. 成都: 四川科技出版社,1988.[7] 中国建筑科学研究院. 天津西站工作报告[R]. 2010.[8] 王国周,瞿履谦. 钢结构原理与设计[M]. 北京:清华大学出版社,1993.