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Hybrid Model for Railroad Bridge Dynamics
| 题名： | Hybrid Model for Railroad Bridge Dynamics |
| 其他题名： | ASTM.(2005)."Standard specification for carbon structural steel."A36/A36M-05,West Conshohocken,PA. |
| 正文语种： | 英文 |
| 作者： | Robin E. Kim |
| 关键词： | Dynamic loads;Hybrid model;Moving mass;Railroad bridges;Resonance;Structural health monitoring |
| 摘要： | Railroads carry approximately 40％ of the ton-miles of the freight in the United States. On the average, a bridge occurs every 2.25 km (1.4 mi) of track, making them critical elements. The primary load on the railroad bridges is the train, resulting in numerous models being developed to understand the dynamic response of bridges under train loads. However, because the problem is time-dependent and coupled, developing adequate models is challenging. Most of the proposed models fail to provide a simple yet flexible representation of the train, bridge, and track. This paper proposes a new hybrid model that is effective for solving the track–bridge interaction problem under moving trains. The main approach is to couple the finite-element model of the bridge with a continuous beam model of the track using the assumed modes method. Both single-track and multitrack bridges are considered. The hybrid model is validated against field measurements for a double-track bridge. This model is then used to predict critical train speeds. The results demonstrate that the hybrid model provides an effective and fundamental tool for predicting bridge dynamics subject to moving trains. The flexible feature of the model will allow accommodating more sophisticated vehicle models and track irregularities. |
| 出版年： | 2016 |
| 论文唯一标识： | P-26Y2016V142N10009 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001530 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 142 |
| 期： | 10 |
| 页码： | 96-106 |
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