鸟嘴式K形间隙节点应力集中系数参数化建模与分析
引用文献：
段英豪 张云梅 曹勇 程斌. 鸟嘴式K形间隙节点应力集中系数参数化建模与分析[J]. 建筑结构，2023，48（02）：120-126.
DUAN Yinghao ZHANG Yunmei CAO Yong CHENG Bin. Parametric modeling and analysis of stress concentration factor for bird-beak gap K-joints[J]. Building Structure，2023,48（02）：120-126.
摘要：鸟嘴式节点是一种新型的焊接方钢管节点，由于其构造上的独特性，以热点应力为目标的参数化建模分析过程较为复杂。针对常见的K形节点形式，以鸟嘴式K形间隙节点的四个无量纲参数为主要变量，建立了一套可靠高效的参数化建模方法。有限元建模基于ANSYS参数化设计语言(APDL),充分考虑鸟嘴式K形间隙节点鞍部和冠部区域的几何特征，同时准确模拟角焊缝几何尺寸的影响，实现了焊趾热点应力的精细化分析和自动化提取。另外，参照国际焊接协会疲劳设计指南建议的热点应力确定方法，在焊趾外侧设立热点外推区，并对其进行网格二次划分，以满足热点应力外推计算的需求。通过与已有试验数据对比，验证了有限元模型的准确性。在此基础上开展参数化分析，发现了鸟嘴式K形间隙节点应力集中系数(SCF)随无量纲参数的变化规律。并通过数值拟合提出了相应的SCF计算公式，可用于此类新型节点的抗疲劳设计和疲劳性能评估。
关键词：方钢管截面；鸟嘴式K形间隙节点；热点应力；应力集中系数；参数化建模；
基金：国家自然科学基金面上项目(51678359)。
尊敬的用户，本篇文章需要2元，点击支付交费后阅读
限时优惠福利：领取VIP会员
全年期刊、会议视频
全部免费！培训视频打折！
全年期刊、会议视频
全部免费！培训视频打折！
参考文献[1] 陈以一，陈扬骥.钢管结构相贯节点的研究现状[J].建筑结构，2002,32(7):52-55,31.
[2] ONO T,IWATA M,ISHIDA K.Local failure of joints of new truss system using rectangular hollow sections subjected to in-plane bending moment [C]//Proceedings of 5th International Symposium on Tubular Structures.Nottingham,1993.
[3] ISHIDA K,ONO T,IWATA M.Ultimate strength formula for joints of new truss system using rectangular hollow sections [C]//Proceedings of 5th International Symposium on Tubular Structures.Nottingham,1993.
[4] DAVIES G,OWEN J S,KELLY R.Bird Beak T-joints in Square Hollow Sections:A Finite Element Investigation [C]//Proceedings of 4th Pacific Structural Steel Conference.Singapore,1995:65-72.
[5] 杜纯领，王伟，陈以一，等.单层网壳X型圆管节点平面外抗弯刚度的参数分析与计算公式[J].建筑结构，2009,39(5):45-48.
[6] 刘胜亮，朱召泉.钻石鸟嘴式T型节点非线性有限元分析[J].钢结构，2011,26(11):24-28,60.
[7] 杨应华，杨志娟.钻石鸟嘴式K型节点极限承载力分析 [J].空间结构，2013,19(3):49-54.
[8] ISHIDA K.Experimental research on fatigue behavior of diamond bird-beak joint [C]//Symposium on Structural Engineering,Architectural Institute of Japan.Tokyo,1992.
[9] KEIZER R.Stress concentration factors in diamond bird beak T-joints [D].Delft,Netherlands:Delft University of Technology,2003.
[10] TONG L W,FU Y G,LIU Y Q,et al.Stress concentration factors of diamond bird-beak SHS T-joints under brace loading [J].Thin-Walled Structures,2014,74:201-212.
[11] TONG L W,XU G W,LIU Y Q,et al.Finite element analysis and formulae for stress concentration factors of diamond bird-beak SHS T-joints [J].Thin-Walled Structures,2015,86:108-120.
[12] CHENG B,QIAN Q,ZHAO X L.Stress concentration factors and fatigue behavior of square bird-beak SHS T-joints under out-of-plane bending [J].Engineering Structures,2015,99:677-684.
[13] 程斌，钱沁.方型鸟嘴式T形方管节点的应力集中特性研究 [J].土木工程学报，2015,48(5):1-10.
[14] CHENG B,LI C,LOU Y,et al.SCF of bird-beak SHS X-joints under asymmetrical brace axial forces [J].Thin-walled Structures,2018,123:57-69.
[15] CHENG B,HUANG F H,LI C,et al .Hot spot stress and fatigue behavior of bird-beak SHS X-joints subjected to brace in-plane bending [J].Thin-Walled Structures,2020,150:106701.
[16] HUANG F H,CHENG B,LI C,et al.Fatigue behavior of bird-beak SHS X-joints under cyclic brace axial forces [J].Journal of Constructional Steel Research,2020,169:106021.
[17] LI C,HUANG F H,LOU Y,et al.Stress concentration factors of bird-beak SHS X-joints under brace axial forces [J].Journal of Constructional Steel Research,2018,150:87-89.
[18] Structural welding code-steel:ANSI/AWS D1.1/D1.1M:2010[S].Miami:American Welding Society,2010.
[19] ZHAO X L,HERION S,PAKER J A,et al.Design guide for circular and rectangular hollow section welded joints under fatigue loading[M].Köln:TÜV-Verlag GmbH,2001.
[20] 李琛.钢桁架桥梁X形、K形鸟嘴式焊接节点的疲劳性能研究 [D].上海：上海交通大学，2019.
[2] ONO T,IWATA M,ISHIDA K.Local failure of joints of new truss system using rectangular hollow sections subjected to in-plane bending moment [C]//Proceedings of 5th International Symposium on Tubular Structures.Nottingham,1993.
[3] ISHIDA K,ONO T,IWATA M.Ultimate strength formula for joints of new truss system using rectangular hollow sections [C]//Proceedings of 5th International Symposium on Tubular Structures.Nottingham,1993.
[4] DAVIES G,OWEN J S,KELLY R.Bird Beak T-joints in Square Hollow Sections:A Finite Element Investigation [C]//Proceedings of 4th Pacific Structural Steel Conference.Singapore,1995:65-72.
[5] 杜纯领，王伟，陈以一，等.单层网壳X型圆管节点平面外抗弯刚度的参数分析与计算公式[J].建筑结构，2009,39(5):45-48.
[6] 刘胜亮，朱召泉.钻石鸟嘴式T型节点非线性有限元分析[J].钢结构，2011,26(11):24-28,60.
[7] 杨应华，杨志娟.钻石鸟嘴式K型节点极限承载力分析 [J].空间结构，2013,19(3):49-54.
[8] ISHIDA K.Experimental research on fatigue behavior of diamond bird-beak joint [C]//Symposium on Structural Engineering,Architectural Institute of Japan.Tokyo,1992.
[9] KEIZER R.Stress concentration factors in diamond bird beak T-joints [D].Delft,Netherlands:Delft University of Technology,2003.
[10] TONG L W,FU Y G,LIU Y Q,et al.Stress concentration factors of diamond bird-beak SHS T-joints under brace loading [J].Thin-Walled Structures,2014,74:201-212.
[11] TONG L W,XU G W,LIU Y Q,et al.Finite element analysis and formulae for stress concentration factors of diamond bird-beak SHS T-joints [J].Thin-Walled Structures,2015,86:108-120.
[12] CHENG B,QIAN Q,ZHAO X L.Stress concentration factors and fatigue behavior of square bird-beak SHS T-joints under out-of-plane bending [J].Engineering Structures,2015,99:677-684.
[13] 程斌，钱沁.方型鸟嘴式T形方管节点的应力集中特性研究 [J].土木工程学报，2015,48(5):1-10.
[14] CHENG B,LI C,LOU Y,et al.SCF of bird-beak SHS X-joints under asymmetrical brace axial forces [J].Thin-walled Structures,2018,123:57-69.
[15] CHENG B,HUANG F H,LI C,et al .Hot spot stress and fatigue behavior of bird-beak SHS X-joints subjected to brace in-plane bending [J].Thin-Walled Structures,2020,150:106701.
[16] HUANG F H,CHENG B,LI C,et al.Fatigue behavior of bird-beak SHS X-joints under cyclic brace axial forces [J].Journal of Constructional Steel Research,2020,169:106021.
[17] LI C,HUANG F H,LOU Y,et al.Stress concentration factors of bird-beak SHS X-joints under brace axial forces [J].Journal of Constructional Steel Research,2018,150:87-89.
[18] Structural welding code-steel:ANSI/AWS D1.1/D1.1M:2010[S].Miami:American Welding Society,2010.
[19] ZHAO X L,HERION S,PAKER J A,et al.Design guide for circular and rectangular hollow section welded joints under fatigue loading[M].Köln:TÜV-Verlag GmbH,2001.
[20] 李琛.钢桁架桥梁X形、K形鸟嘴式焊接节点的疲劳性能研究 [D].上海：上海交通大学，2019.
Parametric modeling and analysis of stress concentration factor for bird-beak gap K-joints
Abstract: Bird-beak joints are a new type of welded square hollow section joints, where the parametric modeling aiming at hot spot stress of such joints is a complicated process due to their unique configurations. A set of reliable and efficient parametric modeling method was established for the common K-joints, taking the four dimensionless parameters of the bird-beak gap K-joints as the main variables. Based on ANSYS parametric design language(APDL), the geometric characteristics of saddle and crown areas were fully considered of bird-beak gap K-joints, and the effect of geometry size of fillet welds were precisely simulated. The fine analysis and automatic extraction of hot spot stress in weld toe were realized. In addition, referring to the hot spot stress determination method recommended in the international institute of welding design guidelines, a hot spot extrapolation area was set up on the outside of the weld toe, and the secondary meshing was carried out to meet the requirement of the extrapolation calculation of the hot spot stress. The accuracy of the finite element model was verified by comparing with the experimental data. On this basis, the parametric analysis was carried out, the variations of stress concentration factor(SCF) with dimensionless parameters were revealed. And the SCF calculation formulae was obtained by numerical fitting, which can be used for the fatigue design and fatigue performance evaluation of this new type of joints.
Keywords: square hollow section; bird-beak gap K-joint; hot spot stress; stress concentration factor; parametric modeling
341
0
0