Abstract A 2-D finite flement model was developed in this study to conduct a FE parametric study on the effects of some variables in the performance of geosynthetic reinforced soil integrated bridge system (GRS-IBS). The variables investigated in this study include the effect of internal friction angle of backfill material, width of reinforced soil foundation (RSF), secondary reinforcement within bearing bed, setback distance, bearing width and length of reinforcement. Other important parameters such as reinforcement stiffness and spacing were previously investgated by the authors. The performance of GRS-IBS were investgated in terms of lateral facing displacement, strain distribution along reinforcement, and location of potential failure zone. The results showed that the internal friction angle of backfill material has a significant impact on the performance of GRS-IBS. The secondary reinforcement, setback distance, and bearing width have low impact on the performance of GRS-IBS. However, it was found that the width of RSF and length of reinforcement have negligible effect on the performance of GRS-IBS. Finally, the potential failure envelope of the GRS-IBS abutment was found to be a combination of punching shear failure envelope (top) that starts under the inner edge of strip footing and extends vertically downward to intersect with Rankine active failure envelope (bottom).

中文翻译：

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土工合成材料加筋土综合桥梁系统（GRS-IBS）的数值参数研究

摘要 本研究建立了一个二维有限元模型，对一些变量对土工合成材料加筋土综合桥梁系统（GRS-IBS）性能的影响进行有限元参数研究。本研究中研究的变量包括回填材料的内摩擦角、加筋土基础 (RSF) 的宽度、承载床内的二次加固、后退距离、承载宽度和加固长度的影响。其他重要参数，如钢筋刚度和间距，以前由作者研究过。GRS-IBS 的性能在横向位移、沿钢筋的应变分布和潜在破坏区的位置方面进行了研究。结果表明，回填材料的内摩擦角对GRS-IBS的性能有显着影响。二次钢筋、后退距离和承载宽度对 GRS-IBS 的性能影响较小。然而，发现RSF的宽度和钢筋的长度对GRS-IBS性能的影响可以忽略不计。最后，发现 GRS-IBS 桥台的潜在破坏包络是冲剪破坏包络（顶部）的组合，它从条形基础的内边缘下方开始并垂直向下延伸以与 Rankine 主动破坏包络（底部）相交。结果发现，RSF 的宽度和钢筋的长度对 GRS-IBS 的性能影响可以忽略不计。最后，发现 GRS-IBS 桥台的潜在破坏包络是冲剪破坏包络（顶部）的组合，该包络从条形基础的内边缘下方开始，并垂直向下延伸至与 Rankine 主动破坏包络（底部）相交。结果发现，RSF 的宽度和钢筋的长度对 GRS-IBS 的性能影响可以忽略不计。最后，发现 GRS-IBS 桥台的潜在破坏包络是冲剪破坏包络（顶部）的组合，该包络从条形基础的内边缘下方开始并垂直向下延伸以与 Rankine 主动破坏包络（底部）相交。