焊接加固热作用对工形截面压弯钢构件承载性能的影响
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《钢结构加固设计规范》国家标准管理组科研专项课题(No.2013-1)


Analysis of welding heat effect on load-carrying behavior of I section steel beam-columns strengthened by welding
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    摘要:

    为研究焊接加固热作用及不同初始负载对工字形压弯钢柱承载性能的影响,基于考虑热影响的热结构耦合分析方法进行了热源模型热输入改进,并考虑初始几何缺陷、初始残余应力及摩擦等,完成了不同负载下焊接加固的3个工字形压弯钢柱的模拟分析。研究了焊接位移时程、腹板应力应变重分布及荷载位移关系,通过有限元分析与相应试验结果对比验证,进而获得了试验无法获得的焊接温度场、翼缘与加固板间的焊接应力应变重分布以及翼缘边缘屈服承载力等结果,并将承载力结果与规范计算结果对比,考察了现有设计方法。结果表明,焊接顺序决定焊接变形的发展过程,焊接热输入和初始负载共同决定持载焊接的位移变化范围和焊接残余变形的大小;初始负载越大,应力应变重分布往偏心受力方向发展更多,承载力越低,而初始残余应力不影响极限承载力;采用考虑热影响的有限元方法具有一定可行性和总体安全性,规范设计方法仍有可提升空间。

    Abstract:

    In order to investigate the influence of reinforcement welding heat effect and different initial load on load-carrying behavior of I section steel beam-columns, three specimens strengthened by welding while under different load were simulated. Based on the thermal-structural coupling method considering heat effect, the analysis improved thermal input of heat source model and also considered initial geometric imperfection, initial residual stress and friction. Time history of displacement during welding, web stress-strain redistribution and load-displacement relationship were discussed, and meanwhile the effectiveness of the finite element analyses(FEA) were verified by comparing the FEA results and test results. Furthermore, welding temperature field, stress-strain redistribution between flange and strengthening plate and flange margin yield capacity, which could not be measured by test, were acquired. And by comparison of bearing capacity results and code calculation results, the present design methods were discussed. The results showed that welding strengthening procedure decided the development of welding residual deformation, while thermal input and initial load effected the range of displacement change during welding under load and magnitude of welding residual deformation. Higher initial load propelled the development of stress-strain redistribution toward the eccentric loading direction, thus leading to lower bearing capacity. However, initial residual stress had little effect on ultimate capacity. FEA method considering heat effect showed certain practicability and overall security, and code design method remained space for improvement still.

    参考文献
    [1] 蒋立,王元清,戴国欣,等.焊接热作用对钢构件负载下加固的影响分析[C]//第十四届全国现代结构工程学术研讨会论文集,天津,2014:755-763.JIANG L,WANG Y Q,DAI G X,et al.Analysis of welding heat effect on steel members strengthened by weld-ing while under load[C]//Symposium of 14th National Modern Structure Conference,Tianjin,2014:755-763.(in Chinese)
    [2] 李少甫,张纳新.长程残余应力下偏压杆的极限承载力[J].建筑结构,1994,6:13-16.LI S F,ZHANG N X.Ultimate load-carrying capacity of beam-column under long range residual stress[J].Building Structure,1994,6:13-16.(in Chinese)
    [3] 中国工程建设标准化协会.钢结构加固技术规范:CECS 77:96[S].北京:中国计划出版社,2005.China Association for Engineering Construction Standardization.Technical code for strengthening steel structures:CECS 77:96[S].Beijing:China Planning Press,2005.(in Chinese)
    [4] 王元清,蒋立,戴国欣,等.负载下钢结构工字形压弯构件焊接加固试验[J].哈尔滨工业大学学报,2016,48(6):30-37.WANG Y Q,JIANG L,DAI G X,et al.Experimental study on I section steel beam-columns strengthened by welding while under load[J].Journal of Harbin Institute of Technology,2016,48(6):30-37.(in Chinese)
    [5] Chen W F,Atsuta T.Theory of beam-columns,Volume 1:In-plane behavior and design[M].United States:J Ross Publishing,2007.
    [6] 王元清,祝瑞祥,戴国欣,等.负载下焊接加固受弯工形钢梁的受力特性分析[J].建筑科学与工程学报,2013,30(4):112-120.WANG Y Q,ZHU R X,DAI G X,et al.Analysis on load-carrying behavior of I section steel beams strengthened with weld while under load by ANSYS[J].Journal of Architecture and Civil Engineering,2013,30(4):112-120.(in Chinese)
    [7] 王元清,祝瑞祥,戴国欣,等.工形钢柱负载下焊接加固的受力特性[J].沈阳建筑大学学报(自然科学版),2014,30(1):25-33.WANG Y Q,ZHU R X,DAI G X,et al.Analysis on load-carrying behavior of I section steel columns reinforced by welding with initial compressive load[J].Journal of Shenyang Jianzhu University (Natural Science),2014,30(1):25-33.(in Chinese)
    [8] 蒋立,王元清,戴国欣,等.负载下工形截面压弯钢构件焊接加固的承载性能分析[J].天津大学学报(自然科学与工程技术版),2015(Sup1):60-66.JIANG L,WANG Y Q,DAI G X,et al.Analysis on load-carrying behavior of I section steel beam-columns strengthened by welding while under load[J].Journal of Tianjin University (Science and Technology),2015(Sup1):60-66.(in Chinese)
    [9] 张文钺.焊接冶金学:基本原理[M].北京:机械工业出版社,1993.
    [10] 莫春立,钱百年,国旭明,等.焊接热源计算模式的研究进展[J].焊接学报,2001,22(3):93-96.MO C L,QIAN B N,GUO X M,et al.The development of models about welding heat source's calculation[J].Transactions of the China Welding Institution,2001,22(3):93-96.(in Chinese)
    [11] Variyar S M,Prasad N S.Estimation of residual stresses in weldments using a nine-noded degenerated shell element[J].Journal of Materials Processing Technology,1999,91(1):150-160.
    [12] 牛犇,刘晓珂,陈志华,等.负载下焊接加固过程对钢梁及钢支撑受力性能的影响研究[J].建筑结构学报,2014,35(7):87-95.NIU B,LIU X K,CHEN Z H,et al.Study on influence of welding reinforcement on mechanical behavior of steel beam and braces in load status[J].Journal of Building Structures,2014,35(7):87-95.(in Chinese)
    [13] 蔡志鹏,赵海燕,吴甦,等.串热源模型及其在焊接数值模拟中的应用[J].机械工程学报,2001,37(4):25-28.CAI Z P,ZHAO H Y,WU S,et al.Model of string heat source in welding numerical simulations[J].Chinese Journal of Mechanical Engineering,2001,37(4):25-28.(in Chinese)
    [14] ANSYS Theory Reference Release 13.0[M].SAS IP,Inc.,2010.
    [15] 李国强,韩林海,娄国彪,等.钢结构及钢-混凝土组合结构抗火设计[M].北京:中国建筑工业出版社,2006.
    [16] European Committee for Standardization.Eurocode 3:Design of steel structures-Part 1-2:general rules-structural fire design:EN 1993-1-2[S].2005.
    [17] 班慧勇,施刚,石永久.高强钢焊接构件工字形横截面残余应力试验及统一分布模型研究[J].工程力学,2012,31(8):83-91.BAN H Y,SHI G,SHI Y J.Experimental and unified model investigations on residual stress within high strength steel welded I-sections[J].Engineering Mechanics,2012,31(8):83-91.(in Chinese)
    [18] European Convention for Constructional Steelworks.Manual on stability of steel structures[S].2nd ed.Bruxelles:ECCS Publ.,1976.
    [19] 李开禧,饶晓峰.单向偏心钢压杆弯扭屈曲临界力[J].重庆建筑工程学院学报,1983,4:1-21.LI K X,RAO X F.Torsional-flexural buckling force of one-way eccentric steel strut[J].Journal of Chongqing Institute of Architecture and Engineering,1983,4:1-21.(in Chinese)
    [20] 李慧娟,黄振华,张京焘.厚板多层多道焊的数值模拟分析[J].宇航材料工艺,2007,37(5):30-33.LI H J,HUANG Z H,ZHANG J T.Numerical simulation of multilayer welding of thick plates[J].Aerospace Materials&Technology,2007,37(5):30-33.(in Chinese)
    [21] 蒋立,王元清,戴国欣,等.钢结构受压柱负载下焊接加固设计方法比较分析[J].工业建筑,2015,2:159-164.JIANG L,WANG Y Q,DAI G X,et al.Comparative study on design methods for steel columns strengthened by welding while under axial and eccentric load in different codes[J].Industrial Construction,2015,2:159-164.(in Chinese)
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蒋立,王元清,戴国欣,张天申,石永久.焊接加固热作用对工形截面压弯钢构件承载性能的影响[J].土木与环境工程学报(中英文),2016,38(4):96-107. Jiang Li, Wang Yuanqing, Dai Guoxin, Zhang Tianshen, Shi Yongjiu. Analysis of welding heat effect on load-carrying behavior of I section steel beam-columns strengthened by welding[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2016,38(4):96-107.10.11835/j. issn.1674-4764.2016.04.015

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  • 收稿日期:2016-02-18
  • 在线发布日期: 2016-08-15
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