Dong Yan-Li, Zhang Hao-Dong, Feng Hao-Ran, Zhao Zhi-Yi, Zhang Jun
Key Laboratory of Highway Construction and Maintenance Technology in Loess Region, Ministry of Transport, Shanxi Transportation Research Institute, Taiyuan, 030006, Shanxi, China.
Department of Civil Engineering, North University of China, Taiyuan, 030051, Shanxi, China.
Sci Rep. 2025 Apr 25;15(1):14476. doi: 10.1038/s41598-025-97989-y.
The Geosynthetic Reinforced Soil-Integrated Bridge System (i.e. GRS-IBS) was developed to address the bumping issue from differential settlement at bridge abutments. This study focused on a Louisiana bridge abutment, using numerical simulation with the finite difference method to assess deformation and stress under dynamic loads. Results showed that deformation of the soil abutment and geogrid increased with the vehicle weight, with a more pronounced effect on lateral displacement than settlement. Settlement values initially decreased then rose with speeds between 30 and 60 km/h, mirroring the trend in lateral displacement and geogrid deformation. The lateral displacement of the geogrid was roughly half that of the panel. Shear stress on the abutment at 5 tons was double that at 1.75 tons, and geogrid stress was triple. Analysis indicated that a vehicle speed of around 45 km/h had the least impact on the reinforced soil abutment. The findings offer valuable insights for the use and maintenance of reinforced earth bridge abutments.
土工合成材料加筋土一体化桥梁系统（即GRS - IBS）的开发是为了解决桥桥台处差异沉降引起的颠簸问题。本研究聚焦于路易斯安那州的一座桥梁桥台，采用有限差分法进行数值模拟，以评估动态荷载作用下的变形和应力。结果表明，土桥台和土工格栅的变形随车辆重量增加而增大，对横向位移的影响比对沉降的影响更为显著。沉降值最初下降，然后在30至60公里/小时的速度范围内上升，这与横向位移和土工格栅变形的趋势一致。土工格栅的横向位移约为面板的一半。5吨时桥台的剪应力是1.75吨时的两倍，土工格栅应力是其三倍。分析表明，车速约45公里/小时对加筋土桥台的影响最小。这些发现为加筋土桥梁桥台的使用和维护提供了有价值的见解。
