东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (5): 729-737.DOI: 10.12068/j.issn.1005-3026.2024.05.016
• 资源与土木工程 • 上一篇
沈翀1, 苏庆田1, 陈友生2
收稿日期:
2022-12-19
出版日期:
2024-05-15
发布日期:
2024-07-31
作者简介:
沈 翀(1996-),男,江苏常州人,同济大学博士研究生基金资助:
Chong SHEN1, Qing-tian SU1, You-sheng CHEN2
Received:
2022-12-19
Online:
2024-05-15
Published:
2024-07-31
摘要:
针对钢桥中厚板十字接头出现错位缺陷的问题,采用有限元方法研究了错位缺陷对厚板十字接头力学性能的影响,提出一种分离式焊接钢板补强方法并对补强钢板的尺寸进行优化设计.研究结果表明,错位缺陷对厚板十字接头的力学性能产生较大的影响,板件竖向应力在附加弯矩作用下显著增大.提出的焊接钢板补强方法使得补强后竖向支承板承担大部分轴力与弯矩,强度控制设计截面位于补强钢板底部焊缝处,可通过增加补强钢板的高度提升补强效率,最高可达48%.本文推荐了不同错位量下补强钢板的合理尺寸,可为类似工程中错位厚板十字接头的补强方法提供参考.
中图分类号:
沈翀, 苏庆田, 陈友生. 钢桥中错位厚板十字接头的力学性能与补强方法[J]. 东北大学学报(自然科学版), 2024, 45(5): 729-737.
Chong SHEN, Qing-tian SU, You-sheng CHEN. Mechanical Properties and Reinforcement Method of Misaligned Thick Plate Cross Joints in Steel Bridge[J]. Journal of Northeastern University(Natural Science), 2024, 45(5): 729-737.
图10 补强钢板厚度对十字接头力学性能的影响(a)—竖向支承板顶部焊缝处; (b)—补强钢板;(c)—补强钢板(厚度28 mm)竖向应力云图.
Fig.10 Influence of the thickness of the steel platesfor reinforcement on mechanical propertiesof cross joint
截面① | 截面② | 截面③ | |||
---|---|---|---|---|---|
200 | 551 | 187 | 364 | 280 | 576 |
300 | 614 | 137 | 328 | 276 | 540 |
400 | 666 | 101 | 292 | 277 | 510 |
500 | 705 | 75 | 257 | 282 | 486 |
600 | 733 | 58 | 224 | 290 | 466 |
700 | 753 | 47 | 194 | 298 | 450 |
表1 补强后十字接头关键截面轴力
Table 1 Axial force of critical sections of reinforced cross joint
截面① | 截面② | 截面③ | |||
---|---|---|---|---|---|
200 | 551 | 187 | 364 | 280 | 576 |
300 | 614 | 137 | 328 | 276 | 540 |
400 | 666 | 101 | 292 | 277 | 510 |
500 | 705 | 75 | 257 | 282 | 486 |
600 | 733 | 58 | 224 | 290 | 466 |
700 | 753 | 47 | 194 | 298 | 450 |
截面① | 截面② | 截面③ | |||
---|---|---|---|---|---|
200 | 8.5 | 42.2 | 2.6 | 47.4 | 118.6 |
300 | 9.0 | 51.1 | 2.5 | 44.5 | 106.0 |
400 | 9.5 | 58.6 | 2.1 | 40.0 | 93.6 |
500 | 10.0 | 64.0 | 1.4 | 35.0 | 80.9 |
600 | 10.4 | 67.8 | 0.7 | 30.0 | 69.0 |
700 | 11.0 | 70.4 | 0.1 | 25.0 | 58.0 |
表2 补强后十字接头关键截面弯矩
Table 2 Bending moment of critical sections of reinforced cross joint
截面① | 截面② | 截面③ | |||
---|---|---|---|---|---|
200 | 8.5 | 42.2 | 2.6 | 47.4 | 118.6 |
300 | 9.0 | 51.1 | 2.5 | 44.5 | 106.0 |
400 | 9.5 | 58.6 | 2.1 | 40.0 | 93.6 |
500 | 10.0 | 64.0 | 1.4 | 35.0 | 80.9 |
600 | 10.4 | 67.8 | 0.7 | 30.0 | 69.0 |
700 | 11.0 | 70.4 | 0.1 | 25.0 | 58.0 |
0 | — | — | 106 | — | — | — |
10 | 400 | 20 | 128 | 112 | 75 | 13 |
20 | 500 | 20 | 156 | 120 | 100 | 23 |
30 | 600 | 28 | 187 | 132 | 105 | 29 |
40 | 700 | 28 | 214 | 131 | 130 | 39 |
50 | 800 | 36 | 239 | 134 | 130 | 44 |
60 | 800 | 40 | 260 | 144 | 150 | 45 |
80 | 900 | 44 | 296 | 148 | 177 | 50 |
100(2.5 d) | 1000 | 48 | 321 | 150 | 218 | 53 |
表3 补强钢板合理尺寸及补强效率 (of steel plates for reinforcement)
Table 3 Reasonable size and reinforcement efficiency
0 | — | — | 106 | — | — | — |
10 | 400 | 20 | 128 | 112 | 75 | 13 |
20 | 500 | 20 | 156 | 120 | 100 | 23 |
30 | 600 | 28 | 187 | 132 | 105 | 29 |
40 | 700 | 28 | 214 | 131 | 130 | 39 |
50 | 800 | 36 | 239 | 134 | 130 | 44 |
60 | 800 | 40 | 260 | 144 | 150 | 45 |
80 | 900 | 44 | 296 | 148 | 177 | 50 |
100(2.5 d) | 1000 | 48 | 321 | 150 | 218 | 53 |
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