Geosynthetic-reinforced soil-integrated bridge system (GRS-IBS) has obtained wide popularity recently. Despite of the abundant research on the behavior of GRS-IBS under static loading, its dynamic performance has not been investigated well, especially for the whole GRS-IBS structure. In this paper, a numerical model in finite element DBLEAVES program was built to simulate the seismic response of GRS-IBS, which was based on the experimental study performed on the whole GRS-IBS with bridge beam resting on the two opposite directional abutments. The applicability and accuracy of the GRS-IBS model was verified by the measured accelerations, lateral facing displacements, and reinforcement tensile forces. Then a variable-amplitude harmonic ground motion record was adopted for relevant parameter analysis. Both experimental and numerical results showed that smaller reinforcement spacing led to smaller lateral facing displacements and tensile forces. Besides, it was found that an increase in earthquake wave frequency and bridge span would induce the increase of acceleration response, lateral facing displacement, and tensile force in reinforcement. The necessity of the whole GRS-IBS model was suggested in the related experimental studies by the significant differences of lateral facing displacement and tensile force of reinforcement among different bridge spans.

土工合成材料加筋土-一体化桥梁系统（GRS-IBS）最近得到了广泛的普及。尽管对 GRS-IBS 在静态载荷下的行为进行了大量研究，但其动态性能尚未得到很好的研究，特别是对于整个 GRS-IBS 结构。在本文中，基于对整个 GRS-IBS 进行的实验研究，在整个 GRS-IBS 上进行了实验研究，桥梁位于两个相反方向的桥台上，在有限元 DBLEAVES 程序中建立了数值模型来模拟 GRS-IBS 的地震响应。GRS-IBS 模型的适用性和准确性通过测量的加速度、横向位移和钢筋拉伸力得到验证。然后采用变幅谐波地震动记录进行相关参数分析。实验和数值结果都表明，较小的钢筋间距导致较小的横向位移和拉力。此外，还发现地震波频率和桥梁跨度的增加会引起加速度响应、横向位移和钢筋拉伸力的增加。相关试验研究表明，不同桥梁跨度之间的侧向位移和钢筋拉力存在显着差异，说明整体GRS-IBS模型的必要性。和钢筋中的拉力。相关试验研究表明，不同桥梁跨度之间的侧向位移和钢筋拉力存在显着差异，说明整体GRS-IBS模型的必要性。和钢筋中的拉力。相关试验研究表明，不同桥梁跨度之间的侧向位移和钢筋拉力存在显着差异，说明整体GRS-IBS模型的必要性。