考虑水平摩阻效应的土工格室加筋体受力分析

FORCE ANALYSIS OF GEOCELL REINFORCEMENT WITH CONSIDERATION OF HORIZONTAL RESISTANCE EFFECT

视土工格室加筋体为置于Winkler弹性地基上的连续有限长梁,考虑荷载作用下格室体与其上下表面土体之间摩阻力影响,基于传统的弹性地基梁理论,建立出相应的格室加筋体挠曲变形控制微分方程。引入Galerkin法,导出具有对称荷载作用下格室加筋体的挠曲变形、转角、剪力及弯矩的非线性解析解。进而进一步分析探讨了格室体与土体之间的摩阻效应对土工格室加筋体内力及位移的影响。结果表明:水平摩阻效应对土工格室加筋体内力及位移有一定程度的影响。

The geocell reinforcement was treated as a beam on Winkler elastic foundation in connection with its stress-deformation characteristics under loads.On the base of the Winkler model,a deformation governing differential equation for the geocell reinforcement was established in which the interface resistances among the reinforcement and the upper and lower soils were taken into account.Using Galerkin method,corresponding nonlinear analytical solutions for the deformation,axial force,shear force and bending moment of the geocell reinforcement under the symmetric loads were presented.The influence of interface resistance on the behavior of geocell reinforcement was investigated.The results show that the horizontal resistance has a weaken effect on the bending deflection and bending moment of geocell reinforcements.