当前位置: X-MOL 学术Comput. Geotech. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Responses of geosynthetic-reinforced soil (GRS) abutments under bridge slab loading: Numerical investigation
Computers and Geotechnics ( IF 5.3 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.compgeo.2020.103566
Panpan Shen , Jie Han , Jorge G. Zornberg , Burak F. Tanyu , Barry R. Christopher , Dov Leshchinsky

Abstract This study evaluated the responses of geosynthetic-reinforced soil (GRS) abutments subjected to bridge slab loading under working stress conditions using two-dimensional finite difference numerical software. A parametric study was conducted to investigate the effects of different combinations of reinforcement spacing Sv and reinforcement stiffness J, beam seat width b, and setback distance ab on the responses of the GRS abutments in terms of additional vertical stresses under the beam seat centerline Δσv induced by the bridge slab load, additional lateral earth pressures behind the abutment facing Δσh-facing and under the beam seat centerline Δσh-cetner induced by the bridge slab load, and maximum tension in the reinforcement Tmax. Numerical analyses evaluated trapezoidal and uniform reinforcement layouts and showed that both reinforcement layouts generated similar responses of the GRS abutments. Under the same ratio of J/Sv, different combinations of Sv and J generated similar distributions of Δσv, Δσh-facing and Δσh-center. The maximum of Tmax with depth decreased almost proportionally with the decrease of Sv. Larger b and ab caused lower Δσv, Δσh-facing, Δσh-center, and smaller Tmax in the upper reinforcement layers. The truncated 2 to 1 distribution method, which considers the effects of abutment facing on the Δσv distribution, could reasonably predict the Tmax in the reinforcement.

中文翻译:

土工合成材料加筋土(GRS)桥台在桥板荷载作用下的响应:数值研究

摘要 本研究使用二维有限差分数值软件评估了土工合成材料加筋土 (GRS) 桥台在工作应力条件下承受桥板荷载的响应。进行了参数研究,以研究钢筋间距 Sv 和钢筋刚度 J、梁座宽度 b 和后退距离 ab 的不同组合对梁座中心线下附加垂直应力 Δσv 引起的 GRS 桥台响应的影响由桥板荷载引起的附加侧向土压力 Δσh-face 桥台后面和梁座中心线下方由桥板荷载引起的附加侧向土压力 Δσh-cetner,以及钢筋中的最大张力 Tmax。数值分析评估了梯形和均匀钢筋布局,并表明两种钢筋布局都产生了类似的 GRS 桥台响应。在相同的 J/Sv 比率下,Sv 和 J 的不同组合产生了相似的 Δσv、Δσh 面向和 Δσh 中心分布。Tmax 的最大值随深度的减小几乎与 Sv 的减小成正比。较大的 b 和 ab 导致较低的 Δσv、Δσh-face、Δσh-center 和上部增强层中的 Tmax 较小。截断的 2 比 1 分布方法考虑了桥台面对 Δσv 分布的影响,可以合理地预测钢筋中的 Tmax。Tmax 的最大值随深度的降低几乎与 Sv 的降低成正比。较大的 b 和 ab 导致较低的 Δσv、Δσh-face、Δσh-center 和上部增强层中的较小 Tmax。截断的 2 比 1 分布方法考虑了桥台面对 Δσv 分布的影响,可以合理地预测钢筋中的 Tmax。Tmax 的最大值随深度的减小几乎与 Sv 的减小成正比。较大的 b 和 ab 导致较低的 Δσv、Δσh-face、Δσh-center 和上部增强层中的 Tmax 较小。截断的 2 比 1 分布方法考虑了桥台面对 Δσv 分布的影响,可以合理地预测钢筋中的 Tmax。
更新日期:2020-07-01
down
wechat
bug