加筋土柔性桥台复合结构抗震性能试验

Seismic Performance of Geosynthetic Reinforced Soil-Integrated Structure in Shaking Table Test

摘要:

通过一组土工合成材料加筋土柔性桥台复合结构（GRSIBS）全桥模型的振动台试验，研究该结构的抗震性能.研究结果表明：GRSIBS结构具有良好的抗震性能，在峰值加速度约为0.8g的Kobe地震波作用下，结构保持整体稳定，仅发生面层外倾、桥头差异沉降等微小的变形；在保持筋材极限强度与加筋间距比值相同的前提下，减小加筋间距有助于提高GRS桥台复合结构的抗震性能.

Abstract:

In this paper, the seismic performance of the geosynthetic reinforced soil-Integrated bridge system(GRS-IBS) structure is analyzed by conducting a set of shaking table test with a full bridge model. The results show that the GRS-IBS structure has a good seismic performance. Under the motion of Kobe seismic wave with a peak acceleration of 0.8g, the overall stability of the structure is good, and only minor deformations occur, such as surface excavation and differential settlement between the bridge beams. Under the premise of keeping the same ratio of Tf to Sv, reducing the reinforcement spacing helps to improve the seismic performance of the GRS abutment.