| 铁路钢桁梁桥在重载列车下的受力适应性分析 |
| Adaptability Analysis of the Railway Steel Truss Bridges under Heavy haul Loads |
| 投稿时间：2015-10-11 |
| 中文关键词:重载列车 钢桁梁桥 整体受力性能 局部受力性能 适应性 安全储备系数 |
| 英文关键词:heavy haul railway steel truss bridge whole stress behavior local stress behavior adaptability safety storage coefficient |
| 基金项目:中国铁路总公司科技研究开发计划课题（2013G010 A） |
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| 中文摘要: |
| 在既有线上开行重载列车可满足我国快速发展的铁路运量要求，但势必会对既有铁路桥梁的安全性产生不利影响。以长东黄河大桥4跨铁路连续钢桁梁为工程背景，采用Midas软件建立了有限元模型，对其整体受力性能和杆件局部受力性能在30 t重载列车下的适应性进行了分析。结果表明：长东黄河大桥连续钢桁梁的整体受力性能满足30 t重载的运营要求，其中竖向挠度安全裕度较中 活载下降约22%，但横向挠度安全裕度无明显下降。钢桁梁各杆件的应力安全储备系数、疲劳安全储备系数和稳定安全储备系数均较中 活载下降低近20%左右，且个别杆件在30 t重载下的疲劳和稳定性能不满足规范要求，需进行适当加固。 |
| 英文摘要: |
| Running heavy haul trains on the existing railway line can satisfy the rapid development of China’s railway transport, but it is bound to have an adverse effect on the safety of existing railway bridges. A four span railway continuous steel truss in ChangDong yellow river bridge is set as the calculating sample, whose finite element model is build with Midas software, and the adaptability of the whole and local stress behaviors are analyzed under the heavy haul loads. The results indicate that, the whole stress behaviors of the four span railway continuous steel truss in ChangDong yellow river bridge satisfy the running demands under the 30 t heavy haul loads, meanwhile the safety margin of the vertical deformation are lower about 22% than that of under the China railway standard live loading, but the safety margin of the lateral deformation has little decrease. The safety storage coefficients of the stress, fatigue and stability of the truss members are lower nearly 20% than that of under the China railway standard live loading, and the fatigue and stability of some members can not satisfy the demand of the code any longer, which should be strengthen to be used continuously. |
| 李运生,刁云峰,张彦玲.铁路钢桁梁桥在重载列车下的受力适应性分析[J].石家庄铁道大学学报：自然科学版,2016,(4):1-7. |
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