原文传递
Assessment of the Strengthening of an RC Railway Bridge with CFRP Utilizing a Full-Scale Failure Test and Finite-Element Analysis
| 题名： | Assessment of the Strengthening of an RC Railway Bridge with CFRP Utilizing a Full-Scale Failure Test and Finite-Element Analysis |
| 其他题名： | American Concrete Institute(ACI).(2011)."Building code requirements for structural concrete and commentary."ACI-318,Farmington Hills,MI,503. |
| 正文语种： | 英文 |
| 作者： | Arto M. Puurula |
| 关键词： | Bridge;Train load;Failure analysis;Ultimate load-carrying capacity;Shear;Near-surfacemounted reinforcement (NSMR);Carbon fiber reinforced polymers (CFRP);Strengthening;Nonlinear finite element analysis (NLFEA);Structural safety and reliability |
| 摘要： | A finite element (FE) model was calibrated using the data obtained from a full-scale test to failure of a 50 year old reinforced concrete (RC) railway bridge. The model was then used to assess the effectiveness of various strengthening schemes to increase the loadcarrying capacity of the bridge. The bridge was a two-span continuous single-track trough bridge with a total length of 30 m, situated in Örnsköldsvik in northern Sweden. It was tested in situ as the bridge had been closed following the construction of a new section of the railway line. The test was planned to evaluate and calibrate models to predict the load-carrying capacity of the bridge and assess the strengthening schemes originally developed by the European research project called Sustainable bridges. The objective of the test was to investigate shear failure, rather than bending failure for which good calibrated models are already available. To that end, the bridge was strengthened in flexure before the test using near-surface mounted square section carbon fiber reinforced polymer (CFRP) bars. The ultimate failure mechanism turned into an interesting combination of bending, shear, torsion, and bond failures at an applied load of 11.7 MN (2,630 kips). A computer model was developed using specialized software to represent the response of the bridge during the test. It was calibrated using data from the test and was then used to calculate the actual capacity of the bridge in terms of train loading using the current Swedish load model which specifies a 330 kN (74 kips) axle weight. These calculations show that the unstrengthened bridge could sustain a load 4.7 times greater than the current load requirements (which is over six times the original design loading), whilst the strengthened bridge could sustain a load 6.5 times greater than currently required. Comparisons are also made with calculations using codes from Canada, Europe, and the United States. |
| 出版年： | 2015 |
| 论文唯一标识： | P-26Y2015V141N01010 |
| 英文栏目名称： | Technical Papers |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001116 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 141 |
| 期： | 01 |
| 页码： | 89-99 |
相关文献
- Experimental and Numerical Investigation of CFRP-Strengthened Steel Beams under Impact Load
- Discussion of "Complex Perturbation Method for Sensitivity Analysis of Nonlinear Trusses" by Ravi Kiran, Lei Li, and Kapil Khandelwal
- Closure to "Lateral Load-Drift Response and Limit States of Posttensioned Steel Beam-Column Connections: Parametric Study" by Saber Moradi and M. Shahria Alam
- Experimental Study of Seismic Behavior of High-Strength RC Columns Strengthened with CFRP Subjected to Cyclic Loading
- Shear Capacity of a RC Bridge Deck Slab: Comparison between Multilevel Assessment and Field Test
- Capturing Out-of-Plane Shear Failures in the Analysis of Reinforced Concrete Shells
检索历史
应用推荐
