【摘要】 对于斜拉桥结构的主梁设计时采用的平面结构模型很难反映其实际的应力分布。利用最小势能原理建立肋板结构考虑剪力滞后的平衡微分方程,采用解析解分析索力在主梁中的传递范围,并在空间有限元和实桥试验研究的基础上,得到了主梁截面应力分布规律及索力传递角度。通过研究,为类似的主梁截面有效宽度的设计计算提供参考。更多还原

【Abstract】 The deck of the cable-stayed bridge is subject to the combination of axial force and moment.General plane or spatial bar-system applied in the structural design will produce significant errors if the shear lag effect within the deck is neglected. Taking into account the shear-lag effect,the differential equations of equilibrium is derived in accordance with principle of minimum potential energy. Then,the influence of cableforce is indicated by analytical solutions. Furthermore,based on finite element analysis and experimental study,the stress distribution in slab and the angle of cable-force propagation are presented. According to these results,this paper may provide necessary parameters for the calculation of effective width for similar Π-shape deck.更多还原