K型空心弯管锥头节点承载力参数化分析
|
摘要
当应用于大跨度、超大跨度空间结构时,K型空心弯管锥头节点不仅可以节约钢材,提高整个屋盖结构的刚度和整体性,同时又有利于弦杆与腹杆的相贯焊接.该节点核心区由节点管、空心切头锥两部分组成.采用ANSYS参数化分析了节点管直径及其壁厚、弦杆直径及其壁厚、腹杆直径及其壁厚、弦杆轴线与腹杆轴线夹角、屋面坡度、弦杆轴力和屈服荷载的比值等因素对节点承载力的影响.分析表明:节点管直径及其壁厚、腹杆直径及其壁厚、弦杆轴线与腹杆轴线夹角、屋面坡度、弦杆轴力和屈服荷载的比值对节点承载力都有显著影响,弦杆1、弦杆2的直径及其壁厚影响较小,建议设计时弦杆1、弦杆2取较小的直径及较薄的壁厚.最后通过多元线性回归拟合了节点承载力计算公式,并根据规范和设计指南对拟合公式进行了简化,以便为实际工程应用提供参考.
When applied to large span and super large span space structures, the hollow curve circular steel tube cone-head K-joints not only can save steel and improve the rigidity and integrity of the entire roof structure, but also is good for direct welding of web member and chord. The joint core region is composed of node tube and hollow truncated cone. This paper uses the ANSYS for analyzing the effects of parameters on the bearing capacity of the joints, including node tube diameter and wall thickness, the chord diameter and wall thickness, the diameter and wall thickness of CHS, the angle between CHS and the chord, the roof slope, the ratio of the axial force of the chord to the yield load. It is shown that, the diameter and wall thickness of node tube and CHS joints, the angle between CHS and the chord, the roof slope and the ratio of the axial force of the chord to the yield load have a significant influence on bearing capacity. There is little effect of the diameter and wall thickness of chords 1 and 2. The design of chords 1 and 2 should choose the smaller diameter and the thinner wall thickness. At last, through the multiple linear regression, the fitting formula of bearing capacity of the node is obtained and the fitting formula is simplified according to the specifications and design guidelines, providing a reference for engineering design.
When applied to large span and super large span space structures, the hollow curve circular steel tube cone-head K-joints not only can save steel and improve the rigidity and integrity of the entire roof structure, but also is good for direct welding of web member and chord. The joint core region is composed of node tube and hollow truncated cone. This paper uses the ANSYS for analyzing the effects of parameters on the bearing capacity of the joints, including node tube diameter and wall thickness, the chord diameter and wall thickness, the diameter and wall thickness of CHS, the angle between CHS and the chord, the roof slope, the ratio of the axial force of the chord to the yield load. It is shown that, the diameter and wall thickness of node tube and CHS joints, the angle between CHS and the chord, the roof slope and the ratio of the axial force of the chord to the yield load have a significant influence on bearing capacity. There is little effect of the diameter and wall thickness of chords 1 and 2. The design of chords 1 and 2 should choose the smaller diameter and the thinner wall thickness. At last, through the multiple linear regression, the fitting formula of bearing capacity of the node is obtained and the fitting formula is simplified according to the specifications and design guidelines, providing a reference for engineering design.
引文
[1] 戚豹,康文梅.管桁架结构设计与施工[M].北京:中国建筑工业出版社,2012.
[2] 刘建平.钢管相贯节点的研究现状和动向[J].钢结构,2003,18(4):13-28.LIU Jian-ping.The status and trend of research on steel tubular intersecting joints [J].Steel Construction,2003,18(4):13-28.
[3] 董石麟,罗尧治,赵阳.新型空间结构分析、设计与施工[M].北京:人民交通出版社,2006.
[4] 陈以一,陈杨冀.钢管结构相贯节点的研究现状[J].建筑结构,2002,32(7):52-55.CHEN Yi-yi,CHEN Yang-ji.The current research status of steel structure nodes [J].Building Structure,2002,32(7):52-55.
[5] 朱庆科,舒宣武.平面K型钢管相贯节点极限承载力有限元分析[J].华南理工大学学报(自然科学版),2002,30(12):62-66.ZHU Qing-ke,SHU Xuan-wu.Ultimate strength analysis of plane circular tubular K-joints by finite element method [J].Journal of South China University of Technology(Natural Science Edition),2002,30(12):62-66.
[6] 刘建平,郭彦林,陈国栋.圆管相贯节点极限承载力有限元分析[J].建筑结构,2002,(7):56-59.LIU Jian-ping,GUO Yan-lin,CHEN Guo-dong.Finite element analysis of ultimate bearing capacity of circular tube joints [J].Building Structure,2002,(7):56-59.
[7] 徐兆娟,魏德敏.钢管结构K型相贯节点的静动态极限承载力[J].四川建筑科学研究,2011,37(3):51-56.XU Zhao-juan,WEI De-min.Ultimate bearing capacity of over-lapped K-joints of steel tubular structures under static and dynamic loads [J].Sichuan Building Science,2011,37(3):51-56.
[8] 窦培林,张家齐,袁洪涛.K型、双K型圆管相贯节点极限承载力的非线性有限元分析[J].舰船科学技术,2008,30(6):49-53.DOU Pei-lin,ZHANG Jia-qi,YUAN Hong-tao.Nonlinear finite element analysis of ultimate strength tubular K,KK-joints circular braces [J].Ship Science and Technology,2008,30(6):49-53.
[9] 马克俭,申波,胡岚.新型超大跨度预应力空间钢网格结构[M].北京:人民交通出版社,2011.
[10] GB 50017-2003.钢结构设计规范[S].北京:中国计划出版社,2003.
[11] PACKER J A,HENDERSON J E著,曹俊杰译.空心管结构连接设计指南[M].北京:科学出版社,1997.
[2] 刘建平.钢管相贯节点的研究现状和动向[J].钢结构,2003,18(4):13-28.LIU Jian-ping.The status and trend of research on steel tubular intersecting joints [J].Steel Construction,2003,18(4):13-28.
[3] 董石麟,罗尧治,赵阳.新型空间结构分析、设计与施工[M].北京:人民交通出版社,2006.
[4] 陈以一,陈杨冀.钢管结构相贯节点的研究现状[J].建筑结构,2002,32(7):52-55.CHEN Yi-yi,CHEN Yang-ji.The current research status of steel structure nodes [J].Building Structure,2002,32(7):52-55.
[5] 朱庆科,舒宣武.平面K型钢管相贯节点极限承载力有限元分析[J].华南理工大学学报(自然科学版),2002,30(12):62-66.ZHU Qing-ke,SHU Xuan-wu.Ultimate strength analysis of plane circular tubular K-joints by finite element method [J].Journal of South China University of Technology(Natural Science Edition),2002,30(12):62-66.
[6] 刘建平,郭彦林,陈国栋.圆管相贯节点极限承载力有限元分析[J].建筑结构,2002,(7):56-59.LIU Jian-ping,GUO Yan-lin,CHEN Guo-dong.Finite element analysis of ultimate bearing capacity of circular tube joints [J].Building Structure,2002,(7):56-59.
[7] 徐兆娟,魏德敏.钢管结构K型相贯节点的静动态极限承载力[J].四川建筑科学研究,2011,37(3):51-56.XU Zhao-juan,WEI De-min.Ultimate bearing capacity of over-lapped K-joints of steel tubular structures under static and dynamic loads [J].Sichuan Building Science,2011,37(3):51-56.
[8] 窦培林,张家齐,袁洪涛.K型、双K型圆管相贯节点极限承载力的非线性有限元分析[J].舰船科学技术,2008,30(6):49-53.DOU Pei-lin,ZHANG Jia-qi,YUAN Hong-tao.Nonlinear finite element analysis of ultimate strength tubular K,KK-joints circular braces [J].Ship Science and Technology,2008,30(6):49-53.
[9] 马克俭,申波,胡岚.新型超大跨度预应力空间钢网格结构[M].北京:人民交通出版社,2011.
[10] GB 50017-2003.钢结构设计规范[S].北京:中国计划出版社,2003.
[11] PACKER J A,HENDERSON J E著,曹俊杰译.空心管结构连接设计指南[M].北京:科学出版社,1997.