动载荷下加筋土挡土墙的可靠性

RELIABILITY OF REINFORCED SOIL RETAINING WALL ON DYNAMIC LOADING

用LUSAS有限元软件对加筋土挡土墙的工程结构在动载荷条件下承受载荷状况进行分析 ,结果表明加筋土挡土墙破坏的主要原因是 :土体松动引起加筋体脱离稳定区 ;加筋体疲劳断裂 ;墙面板剪切破裂 ;因墙体内部出现滑动块体而引起墙址偏移。根据这四种可能引起墙体破坏的方式 ,考虑墙体地基状况和整个墙体抗倾覆能力 ,建立加筋土挡土墙的可靠性功能函数表达式。以正态分布假设 。

The load carry capacity of reinforced soil retaining wall structure on the dynamic load is analyzed by using LUSASEF software. The result shows that reinforced bodies broken away from the stable areas because of soil movement, some reinforcements fatigue fractured especially located in the upper place, shearing deformation of guarding wall, the bottom of guarding wall deviated from original site because of slice wedges in the retaining wall are the causes of the retaining wall failure. With the analysis results and the consideration of foundation situation of the wall and anti overturn ability of the integral structure, the reliability function expressions of retaining wall is set up. the reliability function of stretching resistance of reinforcement is analyzed and calculated by using the second moment method under assumption of Gausses Distribute for factors of the structure.