INFLUENCE OF WELDING STRESS ON MECHANICAL PERFORMANCES OF DOUBLE-LAYER SHOULDER BEAMS WITH MULTI-LIMB MIDDLE COLUMNS OF CONCRETE-FILLED STEEL TUBES AND TEST DEGSIN FOR THE BEARING PERFORMANCES
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摘要: 为研究钢管混凝土多肢中柱双层肩梁在水平刹车荷载作用下的受力性能,结合实际工程,共设计了6个多肢中柱双层肩梁试件,考虑焊接对试件受力性能的影响,对多焊缝相交处进行有限元分析。结果表明:距离多焊缝汇接点4 cm范围内的温度和应力变化剧烈,焊接完成后变形较大,对试件的力学性能具有很大的影响,故在试件制作中应将次焊道断开,汇接点与主焊道最小间距不小于4 cm。同时,详细分析了肩梁试件的制作方法,最大程度地降低试件加工制作对其力学性能的影响。Abstract: In order to study the mechanical properties of double-layer shoulder beams with multi-limbe middle columns of concrete-filled steel tubes (CFST) subjected to braking loads,six specimens of double-layer shoulder beams with multi-limb middle columns of CFST were designed in combination with practical projects.Considering the influence of welding on the mechanical properties of specimens, the intersection of multiple welds was selected for finite element analysis.The results showed that the temperature and stress within 4 cm from the multi-weld junction changed significantly, and the deformation after welding was large, which had a great impact on the mechanical properties of specimens. Therefore, the secondary weld bead should be disconnected in the process of welding of specimens, and the minimum distance between the secondary weld bead and the main weld bead should be no less than 4 cm.At the same time, the fabrication method of shoulder beam specimens was analyzed in detail to minimize the influence of specimen fabrication on its mechanical properties.
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[1] 胡卫中.钢管混凝土双层肩梁承载力及设计方法研究[D].西安:西安建筑科技大学,2017. [2] 兰涛,苏健兴,赵廷涛,等.某重型车间双层肩梁加固的非线性分析[J].钢结构,2018,33(12):130-136. [3] 沈祖炎,郑沂.多肢柱肩梁刚度的分析[J].建筑结构,1999, 29(7):49-52. [4] 于安林,童根树.钢管混凝土双肢柱单腹板肩梁的试验研究和理论分析[J].工业建筑,1998,28(4):24-26. [5] 于安林,童根树.钢管混凝土四肢柱单斜缀杆双腹板肩梁的受力性能[J].西安公路交通大学学报,1998,18(2):40-42. [6] 于安林,童根树.钢管混凝土四肢柱人字形缀杆双腹板肩梁的受力性能[J].西安建筑科技大学学报(自然科学版),1998,30(2):112-114. [7] 于安林,童根树.钢管混凝土柱肩梁研究总结及建议[J]. 西安建筑科技大学学报,1998,30(3):247-249. [8] 董振平.钢管混凝土双肢柱肩梁受力性能与设计方法研究[D].西安:西安建筑科技大学,2011. [9] 苏明周,黄智光,王亚军,等.钢管混凝土双肢柱改进型单腹板肩梁承载能力试验研究[J].西安建筑科技大学学报,2010,42(4):473-479. [10] 王宗让,苏明周,董振平.改进型钢管混凝土柱单腹板肩梁有限元分析及设计方法[J].西安建筑科技大学学报(自然科学版),2015,47(5):666-671. [11] 兰涛,胡卫中,门进杰.钢管混凝土双层肩梁的受力性能分析[J].钢结构,2017,32(6):39-45. [12] LAN T, HU W Z, GAO R X, et al. The Research and Development on Shoulder Beam of CFST[C]//2016 International Symposium on Material Application and Engineering(SMAE 2016). 2016. [13] 中华人民共和国住房和城乡建设部. 钢结构设计标准:GB 50017-2017[S].北京:中国建筑工业出版社,2018. [14] 《钢结构设计手册》编委会. 《钢结构设计手册》(上、下)[M].4版. 北京:中国建筑工业出版社,2020. [15] 白海波. FORTREN程序设计权威指南[M].北京:机械工业出版社,2013. [16] 王聪.钢结构大型焊接构件的焊接变形预测与控制[D].青岛:青岛理工大学,2012. [17] 中华人民共和国建设部.建筑钢结构焊接技术规程:JGJ 81-2002[S].北京:中国建筑工业出版社,2003. [18] 中华人民共和国住房和城乡建设部. 水泥基灌浆材料应用技术规范:GB/T 50448-2008[S].北京:中国标准出版社,2008.
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