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加强土壤的变形和力分析 在动态车辆负载下桥梁支柱
Yan-Li Dong1,2, Hao-Dong Zhang3,4, Hao-Ran Feng3
1Key Laboratory of Highway Construction and Maintenance Technology in Loess Region, Ministry of Transport, Shanxi Transportation Research Institute, Taiyuan, 030006, Shanxi, China. dongyli82@nuc.edu.cn.
Scientific reports
|April 25, 2025
概括
地质合成强化土壤集成桥梁系统 (GRS-IBS) 减少了桥梁支柱的沉积. 数字模拟显示,车辆重量和速度对GRS-IBS变形和应力产生影响,45公里/小时是最佳速度.
科学领域:
- 土木工程 土木工程是指土木工程.
- 地质技术工程 地质技术工程
- 运输工程 运输工程
背景情况:
- 桥梁支柱的差分结算会导致"撞击"问题,影响行驶质量和结构完整性.
- 地质合成强化土壤集成桥梁系统 (GRS-IBS) 是为了缓解这些定居点问题而开发的.
- 了解GRS-IBS在交通负载下的动态反应对于设计和维护至关重要.
研究的目的:
- 为了评估路易斯安那州GRS-IBS桥梁支柱在动态车载下变形和应力.
- 评估车辆重量和速度对GRS-IBS性能的影响.
- 为了确定加强地面桥梁支柱的最佳运行速度.
主要方法:
- 使用有限差方法进行数值模拟.
- 在不同的动态负载下建模一个特定的路易斯安那州桥梁支柱.
- 分析变形 (沉降和横移) 和应力 (剪切和地质电网应力).
主要成果:
- 土壤支柱和地质网格变形随车辆重量增加而增加.
- 侧向位移受到重量的影响比沉降的影响更大.
- 定居点,横移和地质网格变形显示出与速度 (30-60公里/小时) 相似的趋势,在45公里/小时左右的影响最小.
- 地质网的横向位移大约是对面面板的一半.
- 剪切和地质网压力随着车辆重量增加而大幅增加.
结论:
- 车辆的重量显著影响GRS-IBS变形和应力,侧向位移特别敏感.
- 车辆的速度起着至关重要的作用,最佳范围约为45公里/小时,最大限度地减少对强化土壤支柱的不利影响.
- 该研究提供了有效设计,利用和维护钢筋土桥支柱的基本数据,特别是在易受动态负荷影响的地区.
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