Abstract A scaled plane-strain shaking table test was conducted in this study to investigate the seismic performance of a Geosynthetic Reinforced Soil-Integrated Bridge System (GRS-IBS) with a full-length bridge beam resting on two GRS abutments at opposite ends subjected to earthquake motions in the longitudinal direction. This study examined the effects of different combinations of reinforcement stiffness J and spacing Sv on the seismic performance of the GRS-IBS. Test results show that reducing the reinforcement spacing was more beneficial to minimize the seismic effect on the GRS abutment as compared to increasing the reinforcement stiffness. The seismic inertial forces acted on the top of two side GRS abutments interacted with each other through the bridge beam, which led to close peak acceleration amplitudes at the locations near the bridge beam. Overall, the GRS-IBS did not experience obvious structure failure and significant displacements during and after shaking. Shaking in the longitudinal direction of the bridge beam increased the vertical stress in the reinforced soil zone. The maximum tensile forces in the upper and lower geogrid layers due to shaking happened under the center of the beam seat and at the abutment facing respectively.

中文翻译：

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整个土工合成加筋土的抗震性能-综合桥系统（GRS-IBS）在振动台试验中

摘要 本研究进行了比例平面应变振动台试验，以研究土工合成材料加筋土一体化桥梁系统 (GRS-IBS) 的抗震性能，该系统的全长桥梁位于两端的两个 GRS 桥台上，并受到纵向地震运动。本研究检验了钢筋刚度 J 和间距 Sv 的不同组合对 GRS-IBS 抗震性能的影响。试验结果表明，与增加钢筋刚度相比，减小钢筋间距更有利于最大限度地减少对 GRS 桥台的地震影响。作用在两侧 GRS 桥台顶部的地震惯性力通过桥梁相互作用，这导致靠近桥梁位置的峰值加速度振幅。总体而言，GRS-IBS 在振动过程中和振动后没有经历明显的结构破坏和显着位移。桥梁纵向的振动增加了加筋土区的竖向应力。上、下土工格栅层因振动而产生的最大拉力分别发生在梁座中心下方和桥台面。