Mechanical performances of box girder with corrugated steel webs under eccentric loading
-
摘要: 通过空间有限元分析, 对影响其力学性能的高跨比、宽跨比、钢腹板的波纹形状及其板厚等几何参数进行了敏感性研究。结果表明, 减小高跨比和宽跨比、增大波形钢板的折叠角度、增加水平面板宽度以及增大钢腹板厚度可以改善结构在偏载作用时的受力性能。Abstract: With the finite element method, several geometrical parameters influencing its mechanical performances were analyzed. These parameters include the ratio of height and span, the ratio of width and span, corrugation configuration of steel web and the thickness of steel web. The results show that decreasing the ratio of height and span, the ratio of width and span, the configuration angle, horizontal panel width and the thickness of steel webs can improve its mechanical performances under eccentric loading.
-
Key words:
- bridge engineering /
- corrugated steel web /
- box girder /
- eccentric loading /
- geometrical parameters
-
图 7 波纹形状对钢腹板箱梁翘曲正应力的影响
Figure 7. Influence of corrugation on warping normal stress of box girder
图 8 钢腹板厚度对翘曲正应力的影响
Figure 8. Thickness influence of steel web on warping normal stress
图 9 应力增大系数随板厚比的变化
Figure 9. Variety of stress magnification coefficient with thickness ratio
表 1 不同高跨比下箱梁跨中底板角点的纵向应力
Table 1. Lognitudinal stress of bottom slab under different ratio of height and span
有限元模型 高度H/m 高跨比H/L 对称应力/MPa 偏载应力/MPa 应力增大系数 CASE-1 5.0 1/10.0 0.370 9 0.833 8 2.248 CASE-2 4.0 1/12.5 0.506 9 0.961 1 1.896 CASE-3 3.3 1/15.0 0.577 9 1.015 7 1.758 CASE-4 2.8 1/17.5 0.782 9 1.178 1 1.505 CASE-5 2.5 1/20.0 0.921 6 1.274 2 1.383 CASE-6 2.2 1/22.5 1.074 5 1.380 5 1.285 CASE-7 2.0 1/25.0 1.229 9 1.481 6 1.205 
下载: 导出CSV
表 2 不同宽跨比下箱梁跨中底板角点的纵向应力
Table 2. Lognitudinal stress of bottom slab under different ratio of width and span
有限元模型 宽度W2/m 宽跨比W2/L 对称应力/MPa 偏载应力/MPa 应力增大系数 CASE-1 6.3 1/8 0.491 2 0.944 7 1.923 CASE-2 5.0 1/10 0.585 7 1.037 0 1.770 CASE-3 4.2 1/12 0.679 2 1.100 2 1.620 CASE-4 3.6 1/14 0.776 5 1.180 4 1.520 CASE-5 3.1 1/16 0.871 5 1.256 0 1.441 CASE-6 2.8 1/18 0.972 0 1.333 7 1.372 CASE-7 2.5 1/20 1.065 9 1.405 5 1.319
下载: 导出CSV
-
[1] 李宏江, 叶见曙, 万水, 等. 剪切变形对波形钢腹板箱梁挠度的影响[J]. 交通运输工程学报, 2002, 2(4): 17-20. http://transport.chd.edu.cn/article/id/200204004LI Hong-jiang, YE Jian-shu, WAN Shui, et al. Influence of shear deformation on the deflection of box girder with corrugated steel webs[J]. Journal of Traffic and Transportation Engineering, 2002, 2(4): 17-20. (in Chinese) http://transport.chd.edu.cn/article/id/200204004 [2] 李宏江, 叶见曙, 万水. 波形钢腹板剪切屈曲强度分析及几何参数设计[A]. 第十一届全国结构工程学术会议论文集[C]. 北京: 清华大学出版社, 2002. [3] 李宏江, 万水, 叶见曙. 波形钢腹板PC组合箱梁的结构特点[J]. 公路交通科技, 2002, 19(3): 53-57. https://www.cnki.com.cn/Article/CJFDTOTAL-GLJK200203015.htmLI Hong-jiang, WAN Shui, YE Jian-shu. Structural property of prestressed concrete box-girder with corrugated steel webs[J]. Journal of Highway and Transportation Research and Development, 2002, 19(3): 53-57. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GLJK200203015.htm [4] 蔡千典, 冉一元. 波形钢腹板预应力结合箱梁结构特点的探讨[J]. 桥梁建设, 1994, 24(1): 26-30. https://www.cnki.com.cn/Article/CJFDTOTAL-QLJS401.005.htmCAI Qian-dian, RAN Yi-yuan. Discussion of structural properties on prestressed concrete box girder with corrugated steel webs[J]. Bridge Construction, 1994, 24(1): 26-30. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-QLJS401.005.htm [5] Rosignoli M. Prestressed concrete box girder bridges with folded steel plate webs[A]. Proceedings of Institute of Civil Engineering Structures and Bridges[C]. London: Thomas Telford Publishing House, 1999. [6] 刘磊, 钱冬生. 波纹钢腹板预应力结合梁桥[J]. 国外公路, 1999, 19(1): 26-30. https://www.cnki.com.cn/Article/CJFDTOTAL-GWGL901.005.htmLIU Lei, QIAN Dong-sheng. Prestressed and combined girder bridge with corrugated steel webs[J]. Foreign Highway, 1999, 19(1): 26-30. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GWGL901.005.htm [7] 刘海燕. 日本修建的波形钢腹板PC箱梁桥一览表[J]. 国外桥梁, 2002, 30(1): 58-59. https://www.cnki.com.cn/Article/CJFDTOTAL-GWQL200201012.htmLIU Hai-yan. List of prestressed concrete box girder with corrugated steelwebs in Japan[J]. Foreign Bridges, 2002, 30(1): 58-59. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GWQL200201012.htm [8] 李宏江. 波形钢腹板箱梁扭转与畸变的试验研究及分析[D]. 南京: 东南大学, 2003. -
点击查看大图
计量
- 文章访问数: 286
- HTML全文浏览量: 101
- PDF下载量: 246
- 被引次数: 0
