水平集中荷载作用下悬臂式挡土墙平面简化计算荷载取值探讨

Exploration on Load Value in Simplified Plane Calculation of Cantilever Retaining Wall Under Horizontal Concentrated Loads

水平集中荷载作用于悬臂式挡土墙墙顶时,传统的计算方法将集中荷载除以荷载间距施加到平面模型中计算,在荷载间距较大时,该方法所得计算结果与挡土墙实际受力存在较大误差,导致集中荷载附近墙体内力偏小,相邻集中荷载之间墙体内力偏大。为此,采用有限单元法建立悬臂式挡土墙的三维及平面受力分析模型,重点分析了荷载强度、墙高、荷载间距对墙体内力分布的影响,得到了水平集中荷载作用下采用悬臂式挡土墙平面简化计算模型计算时的荷载修正系数,为设计者提供借鉴和参考。

When the horizontal lumped load is applied on the crown of the cantilever retaining wall,traditional calculation method employs the linear distributed load,which can lead to the improper internal force around the crown and the wall compared with the real situation. For this purpose,the critical factors such as the load strength,wall height and load spacing are modeled,and then three-dimensional stress and plane analysis model is established to analyze the internal force distribution of the retaining wall in virtue of the finite element method（ FEM）. Moreover,the correction factor of load is obtained,which can be used as a reference for the designers.