直接分析法在双斜撑钢井架结构设计中的应用分析
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摘要
钢井架双斜撑柱为变截面构件,梁柱的刚度比很难确定。论文介绍了胡家河矿井双斜撑钢井架的结构选型、斜架和立架布置,应用有限元软件STAAD.PRO考虑初始几何缺陷、杆件初弯曲和刚度折减,同时,采用直接分析法对整体结构进行计算,得出钢井架的应力变化规律和主要构件的应力比,构件校核时有效长度系数K=1.0。结果表明,该设计方法合理有效。
The column of double-braced steel shaft headframe is a kind of variable cross-section member and the beam-column stiffness ratio is difficult to determine. This paper mainly introduces the structural selection, inclined frame and vertical frame layout of the double-braced steel shaft headframe in Hujiahe. By using STAAD.PRO finite element software, the initial geometrical defects, member initial bend and stiffness reduction are considered. At the same time, the direct structure analysis method is used to calculate the overall structure, the stress changes in certain rules and the ratio of main members can be concluded. Effective length factor is designed on the basis of K= 1.0 when members are checking. The results indicates that the design method is reasonable and effective.
The column of double-braced steel shaft headframe is a kind of variable cross-section member and the beam-column stiffness ratio is difficult to determine. This paper mainly introduces the structural selection, inclined frame and vertical frame layout of the double-braced steel shaft headframe in Hujiahe. By using STAAD.PRO finite element software, the initial geometrical defects, member initial bend and stiffness reduction are considered. At the same time, the direct structure analysis method is used to calculate the overall structure, the stress changes in certain rules and the ratio of main members can be concluded. Effective length factor is designed on the basis of K= 1.0 when members are checking. The results indicates that the design method is reasonable and effective.
引文
[1]中煤西安设计工程有限责任公司.陕西省彬长矿区胡家河矿井及选煤厂初步设计说明书[R].2007.
[2]马中成,路中科,郭建宏.大型井架悬挂式立架受力特点分析[J].钢结构,2015(1):33-36.
[3]GB 50385—2006矿山井架设计规范[S].
[4]陈绍蕃.钢结构稳定设计指南(第三版)[M].北京:中国建筑工业出版社,2013.
[5]GB50017—2003钢结构设计规范[S].
[6]周奎,宋启根.钢结构几何缺陷的直接分析方法[J].建筑钢结构进展,2007,9(1):57-62.
[7]AISC 360-10 Specification for Structural Steel Buildings[S].USA:AISC,2010[S].
[8]曹海通.箱型截面钢井架天轮平台梁数值计算方法研究[D].徐州:中国矿业大学,2015.
[2]马中成,路中科,郭建宏.大型井架悬挂式立架受力特点分析[J].钢结构,2015(1):33-36.
[3]GB 50385—2006矿山井架设计规范[S].
[4]陈绍蕃.钢结构稳定设计指南(第三版)[M].北京:中国建筑工业出版社,2013.
[5]GB50017—2003钢结构设计规范[S].
[6]周奎,宋启根.钢结构几何缺陷的直接分析方法[J].建筑钢结构进展,2007,9(1):57-62.
[7]AISC 360-10 Specification for Structural Steel Buildings[S].USA:AISC,2010[S].
[8]曹海通.箱型截面钢井架天轮平台梁数值计算方法研究[D].徐州:中国矿业大学,2015.