地震作用下土工格栅加筋土双边坡动力分析

Dynamic Analysis of Geogrid Reinforced Soil Double Slope under Seismic Action

运用动力响应时程分析和应用理论,结合国内首次出现的对称土工格栅加筋土双边坡实体工程,建立三维有限元分析模型,研究对称土工格栅加筋土双边坡的动态特征。分析在地震加速度下的位移大小、变形情况、拐角处填土剪切应力、坡脚处土工格栅的拉力和结构加速度,以及最大变形、位移部位。通过数值模拟分析得到地震加速度为0.3509g下结构的各项响应值均未超过设计极限值,表明该结构在地震加速度下稳定好、抗震性能好。分析结果能为对称土工格栅加筋土双边坡的抗震设计提供一定的参考价值。

By using dynamic response time history analysis and applied theory,combined with the rare symmetrical geogrid reinforced soil double slope engineering,a 3 D finite element analysis model was established.The dynamic characteristics of double slope reinforced with symmetrical geogrids were studied.The displacement,deformation,shear stress of the corner fill,the tension of the geogrid at the foot of the slope and the structural acceleration under the earthquake acceleration were analyzed,and the maximum deformation,displacement parts.The resutt show that,according to the numerical simulation analysis,all the response values of the structure with the seismic acceleration of 0.3509 g do not exceed the design limit.It is shown that the structure is stable and has good seismic performance under seismic acceleration.The analysis results can provide some reference value for the seismic design of the double slope reinforced with symmetrical geogrids.