钢吊车梁直角式突变支座疲劳性能研究
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摘要
钢吊车梁直角式突变支座在工业建筑中应用广泛,然而缺乏该类连接的疲劳强度评估数据。通过回顾直角式突变支座的演化历史,基于有限元分析,研究了截面参数对直角式突变支座应力集中区域的影响;通过缩尺模型疲劳试验,得出适用于该类构件疲劳强度评估的S-N曲线,直角式突变支座插入板与封板连接焊缝的疲劳强度相对于200万次的允许应力幅为80. 2 MPa,与GB 50017—2017《钢结构设计标准》中的第Z7类相似。
The right-angle mutational support of steel crane beams has been widely used in industrial buildings,but lacks the fatigue strength evaluation data for this type of connection. The paper reviewed the evolution history of right-angle mutational support,studied the influence of cross-section parameters on stress concentration area of rightangled mutation support through the finite element analysis,and obtained S-N curve suitable for the fatigue strength evaluation of this kind of member through fatigue test of scale model. The fatigue strength of the welds between the insert plate and the sealing plate of the right-angle mutational support was 80. 2 MPa relative to the allowable stress amplitude of 2 million times,which was similar to the Z7 class in GB 50017—2017 Standard for Design of Steel Structures.
The right-angle mutational support of steel crane beams has been widely used in industrial buildings,but lacks the fatigue strength evaluation data for this type of connection. The paper reviewed the evolution history of right-angle mutational support,studied the influence of cross-section parameters on stress concentration area of rightangled mutation support through the finite element analysis,and obtained S-N curve suitable for the fatigue strength evaluation of this kind of member through fatigue test of scale model. The fatigue strength of the welds between the insert plate and the sealing plate of the right-angle mutational support was 80. 2 MPa relative to the allowable stress amplitude of 2 million times,which was similar to the Z7 class in GB 50017—2017 Standard for Design of Steel Structures.
引文
[1]岳清瑞,幸坤涛,郑云.钢吊车梁系统疲劳诊治[M].北京:中国建筑工业出版社,2017.
[2]郑廷银,卢铁鹰.几种钢吊车梁变截面支座抗疲劳性能的对比分析[J].重庆建筑大学学报,1996(4):79-86
[3]郑廷银.钢吊车梁变截面支座的疲劳性能研究[J].建筑结构,1997(6):9-12
[4]赵晓青,惠云玲,常好诵,等.弯曲封板直角突变式钢吊车梁的疲劳强度分析[J].工业建筑,2017,47(7):115-159.
[5]卢铁鹰,赵清,卢平.钢吊车梁直角突变式支座疲劳性能试验研究[J],重庆建筑工程学学报,1994(4):39-48.
[6] IIW Joint Working Group XIII-XV. Recommendations for Fatigue Design of Welded Joints and Components:IIW Document XIII-1965-03/XV-1127-03[S]. Paris:International Institute of Welding,2003.
[7]中华人民共和国住房和城乡建设部.钢结构设计标准:GB50017—2017[S].北京:中国建筑工业出版社,2017.
[2]郑廷银,卢铁鹰.几种钢吊车梁变截面支座抗疲劳性能的对比分析[J].重庆建筑大学学报,1996(4):79-86
[3]郑廷银.钢吊车梁变截面支座的疲劳性能研究[J].建筑结构,1997(6):9-12
[4]赵晓青,惠云玲,常好诵,等.弯曲封板直角突变式钢吊车梁的疲劳强度分析[J].工业建筑,2017,47(7):115-159.
[5]卢铁鹰,赵清,卢平.钢吊车梁直角突变式支座疲劳性能试验研究[J],重庆建筑工程学学报,1994(4):39-48.
[6] IIW Joint Working Group XIII-XV. Recommendations for Fatigue Design of Welded Joints and Components:IIW Document XIII-1965-03/XV-1127-03[S]. Paris:International Institute of Welding,2003.
[7]中华人民共和国住房和城乡建设部.钢结构设计标准:GB50017—2017[S].北京:中国建筑工业出版社,2017.