| 引用本文: | 涂光亚,颜东煌,邵旭东.脱粘对单圆管钢管混凝土拱桥极限承载力的影响[J].哈尔滨工业大学学报,2010,42(12):1999.DOI:10.11918/j.issn.0367-6234.2010.12.032 |
| TU Guang-ya,YAN Dong-huang,SHAO Xu-dong.Debonding effects on ultimate bearing capacity of single tube concrete-filled steel tubular arch bridge[J].Journal of Harbin Institute of Technology,2010,42(12):1999.DOI:10.11918/j.issn.0367-6234.2010.12.032 |
|
| 摘要: |
| 为了解单圆管钢管混凝土拱桥脱粘后受力模式改变带来的受力性能变化,采用有限元方法计算了脱粘对单圆管钢管混凝土拱桥面内极限承载力的影响,基于完全脱粘计算假定,构造了钢管与混凝土之间的连接单元,编制了考虑几何、材料双重非线性的面内极限承载力计算程序,并对无初应力和成桥状态下4种荷载作用方式的面内极限承载力进行计算分析.结果表明:完全脱粘使跨中集中力、L/4集中力和半跨均布荷载作用下的面内极限承载力变化不明显;而使全跨均布荷载作用下的面内极限承载力降低较大.对于单圆管钢管混凝土拱桥,在全跨均布荷载作用下,完全脱粘使得面内极限承载力下降可达10%左右. |
| 关键词: 单圆管 钢管混凝土拱桥 脱粘 极限承载力 |
| DOI：10.11918/j.issn.0367-6234.2010.12.032 |
| 分类号: |
| 基金项目:湖南省高校科技创新团队支持计划资助项目(2008);长沙理工大学土木与建筑学院重点学科基金资助项目(10QSSK07) |
|
| Debonding effects on ultimate bearing capacity of single tube concrete-filled steel tubular arch bridge |
|
TU Guang-ya1, YAN Dong-huang1, SHAO Xu-dong2
|
|
1.School of Civil Engineering and Architecture,Changsha University of Science and Technology,Changsha 410004, China;2.School of Civil Engineering,Hunan University,Changsha 410082,China
|
| Abstract: |
| To quantitatively analyze the effect of debonding between steel tube and filled concrete on the ultimate bearing capacity of CFST arch bridge,a calculation model was proposed based on reasonable assumptions.The calculation program was written by using finite element method,and used to simulate the process of debonding between steel tube and filled concrete.The program was verified.By taking a single tube CFST arch bridge as a case study,the calculation results show that under uniformly distributed load on full span,the complete debonding makes the ultimate bearing capacity of single tube CFST arch bridge decreased about 10%. |
| Key words: single tube concrete-filled steel tubular arch bridge debonding ultimate bearing capacity |
