【摘要】 为研究荷载横向变位和纵向多点加载工况下,箱梁荷载施加截面的剪力滞效应,以ANSYS有限元分析软件为平台,并将荷载在纵向分为单点加载与双点加载2种情况,在横向分为对称加载、偏心加载和中心加载3种情况。分析了单点加载与双点加载情况下加载截面处的剪力滞效应,对比研究了单点加载与双点加载工况下跨中截面剪力滞效应。结果表明,在单点及双点加载情况下,中心加载对箱梁顶板剪力滞效应影响最大,偏心加载次之,对称加载相对最小;在单点加载情况下,偏心加载对箱梁底板剪力滞效应影响最大,中心加载次之,对称加载相对最小;单点加载情况下箱梁跨中顶板及底板剪力滞效应均明显强于双点加载情况下箱梁跨中顶板及底板剪力滞效应。更多还原

【Abstract】 In order to study the shear lag effect of box girder under lateral load and vertical multi-point loading.ANSYS finite element analysis software is used as the platform.Vertically,the load is divided into single-point load and dual-point loadings,horizontally,the load is divided into symmetrical,eccentric and center loadings.Special analysis is made on the shear lag effect at the loading section of single-point loading and dual-point loadings,and the shear lag effect in the cross section of single-point loading and dual-point loading is analyzed by comparison.The results show that under the condition of singlepoint and dual-point loadings,the influence of central loading on the shear lag effect of box girder is the biggest,eccentric loading lies the second,and compared with that,the symmetric loading is the smallest.Under the situation of the single point loading,the shear lag effect of the box girder is affected by the eccentric load,which is the greatest,and the load of the center is the second,and compared with that,the symmetrical load is the smallest.In the case of single point loading,the shear lag effect of the box girder and the bottom plate is significantly stronger than that of the shear lag effect of the box girder under the double point loading.更多还原