原文传递
New Model for Estimating the Time-Variant Seismic Performance of Corroding RC Bridge Columns
| 题名： | New Model for Estimating the Time-Variant Seismic Performance of Corroding RC Bridge Columns |
| 其他题名： | Ahmad,S.(2003)."Reinforcement corrosion in concrete structures,its monitoring and service life prediction—A review."Cem.Concr.Compos.,25(4–5),459–471. |
| 正文语种： | 英文 |
| 作者： | Yisen Guo |
| 关键词： | Corrosion;Chlorides;Time-variant performance;Model;Reliability;Structural safety and reliability |
| 摘要： | Corrosion of reinforcement is a predominant reason for reduced service lives of reinforced concrete (RC) structures exposed to aggressive environments. This deterioration process can lead to damage resulting in capacity loss or even structural failure, especially in coastal marine environments or where deicing or antiicing applications occur. Based on data from the National Bridge Inventory in 2010, the average bridge age in the country is 40 years old. Thirty percent of the bridges have exceeded 50 years, 7％ have exceeded 75 years, and 25％ are deemed deficient. For bridges exposed to chlorides (coastal areas or deicing or antiicing exposure), these older bridges often experience corrosion of the reinforcement. When reinforcement corrodes, the capacity of the structure is likely reduced, although little work has been reported on quantifying the reduction in performance and reliability. In seismic areas, this reduction in capacity may be magnified due to the loading demands during a seismic event. Therefore, understanding the time-variant risks associated with corroding structures will assist engineers and decision makers in making sound decisions with respect to optimization of design, inspection, repair, strengthening, and/or replacement of RC structures. This paper develops a new deterministic corrosion rate model and then uses the new model to assess the timevariant reliability of a corroding column subjected to a seismic event. The results indicate that corrosion can significantly reduce the reliability of an existing bridge column over relatively short durations. |
| 出版年： | 2015 |
| 论文唯一标识： | P-26Y2015V141N06011 |
| 英文栏目名称： | Technical Papers |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001145 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 141 |
| 期： | 06 |
| 页码： | 112-123 |
相关文献
- Stochastic Modeling of Deterioration and Time-Variant Performance of Reinforced Concrete Structures under Joint Effects of Earthquakes, Corrosion, and ASR
- Probabilistic Seismic Demand Models and Life-Cycle Fragility Estimates for High-Rise Buildings
- Estimating Earthquake-Induced Displacement Responses of Building Structures Using Time-Varying Model and Limited Acceleration Data
- Life-Cycle Assessment of Long-Span Bridge’s Wind Resistant Performance Considering Multisource Time-Variant Effects and Uncertainties
- Effect of Seismic Load History on Deformation Limit States for Longitudinal Bar Buckling in RC Circular Columns
- Experimental Study of Seismic Behavior of High-Strength RC Columns Strengthened with CFRP Subjected to Cyclic Loading
检索历史
应用推荐
