Research on the Fatigue Performance of Prestress-Strengthened Right-Angle Abrupt-Section Steel Crane Beams

LI Liang; MAO Lingyi; CHANG Haosong; REN Zhikuan

doi:10.3724/j.gyjzG26032606

Volume 56 Issue 5

May 2026

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LI Liang, MAO Lingyi, CHANG Haosong, REN Zhikuan. Research on the Fatigue Performance of Prestress-Strengthened Right-Angle Abrupt-Section Steel Crane Beams[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(5): 159-166. doi: 10.3724/j.gyjzG26032606

Citation:

LI Liang, MAO Lingyi, CHANG Haosong, REN Zhikuan. Research on the Fatigue Performance of Prestress-Strengthened Right-Angle Abrupt-Section Steel Crane Beams[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(5): 159-166. doi: 10.3724/j.gyjzG26032606

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Research on the Fatigue Performance of Prestress-Strengthened Right-Angle Abrupt-Section Steel Crane Beams

doi: 10.3724/j.gyjzG26032606

1. Inspection and Certification Co., Ltd., MCC, Beijing 100088, China;
2. Ningbo Industrial Architectural Design & Research Institute Co., Ltd., Ningbo 315000, China;
3. Science and Technology Institute of Urban Safety Development (Shenzhen), Shenzhen 518000, China;
4. China Academy of Building Research, Beijing 100013, China

Received Date: 2026-03-26
Available Online: 2026-06-06
Publish Date: 2026-05-20

Abstract

Abstract

This study investigated the fatigue life of steel crane beams through fatigue testing and combined finite element analysis to reveal the stress distribution changes at the support of variable-section beams before and after prestress strengthening. In addition， the equivalent structural stress method was employed to predict the fatigue life corresponding to the initiation of 20 mm cracks at the support. The results indicated that prestress strengthening significantly reduced the stress level at critical welds， while the location of maximum stress and the failure mode remained unchanged. With increasing prestress control values， both the overall failure life of the beam and the crack initiation life at the support were significantly extended. Under a prestress control value of 12.5 t， the strengthening effectiveness factors for overall beam failure and visible support cracks reached 4.08 and 4.23， respectively， demonstrating the effectiveness of high-level prestressing.
- steel crane beam,
- prestress,
- equivalent structural stress method,
- fatigue performance enhancement

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References(17)

References

[1]	赵晓青，幸坤涛，常好诵，等. 钢吊车梁直角式突变支座疲劳性能研究［J］. 工业建筑，2019，49（5）：166- 169.
[2]	程卓，幸坤涛，严勇，等. 吊车梁系统附属构件疲劳可靠性研究［J］. 工业建筑，2023，53（增刊2）：307- 311.
[3]	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.
[4]	赵晓青，岳清瑞，幸坤涛. 钢吊车梁直角式突变支座插入板端部疲劳性能研究［J］. 建筑结构学报，2020，41（8）：116- 123.
[5]	郑云，孙嘉伟，赵欣，等. 直角突变式钢吊车梁疲劳性能及加固方法研究［J］. 工程力学，2024，41（增刊1）：275- 281.
[6]	赵轩，蒙瑜，吴昕，等. 某大型吊车梁疲劳开裂及加固分析研究［J］. 工业建筑，2023，53（增刊2）：332- 334.
[7]	赵晓青，常好诵，陈佳宇，等. 三腹板圆弧过渡式支座钢吊车梁疲劳试验研究［J］. 工业建筑，2019，49（6）：45- 48.
[8]	胡宝琳，徐宇豪，左志远，等.“贝壳板”加固直角突变式钢吊车梁疲劳性能研究［J］. 湖南大学学报（自然科学版），2024，51（9）：55- 65.
[9]	胡宝琳，周磊，庄继勇，等. 直角突变式钢吊车梁裂纹扩展及疲劳寿命研究［J］. 振动与冲击，2022，41（14）：135- 144.
[10]	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）：155- 159.
[11]	马人乐，简天华. 预应力抗疲劳钢梁的试验研究与数值分析［J］. 特种结构，2015，32（2）：1- 4.
[12]	高志刚，苗哲，何佳晨，等. 体外预应力钢绞线加固钢吊车梁受弯性能试验［J］. 西安科技大学学报，2025，45（2）：351- 361.
[13]	何佳晨. 钢吊车梁体外预应力加固方法研究［D］. 西安：西安科技大学，2025.
[14]	DONG P. A structural stress definition and numerical implementation for fatigue analysis of welded joints［J］. International Journal of Fatigue，2001，23（10）：865- 876.
[15]	兆文忠，李向伟，董平沙. 焊接结构抗疲劳设计理论与方法［M］. 北京：机械工业出版社，2017.
[16]	中华人民共和国住房和城乡建设部. 预应力钢结构技术标准：JGJ/T 497—2023［S］. 北京：中国建筑工业出版社，2023.
[17]	赵晓青. 钢吊车梁变截面支座概率损伤容限法研究［D］. 西安：西安建筑科技大学，2020.