论文部分内容阅读
为从理论上获得预张力悬索桥的力学特性,利用大位移不完全广义势能变分原理,建立了预张力悬索桥的一般基础微分方程.在进一步引入假设条件下,导出了基于古典挠度理论的平衡微分方程.通过对微分方程的解析,讨论了预张力悬索桥的静力学特性及其与普通悬索桥的区别.结合算例悬索桥的数值分析表明,预张力悬索桥由于抗风索的存在,以及结构中建立的预张力,在提高结构刚度、减小加劲梁弯矩等方面具有一定的优越性.
In order to theoretically obtain the mechanical characteristics of the prestressed suspension bridge, the general differential equation of prestressed suspension bridge is established by using the generalized potential energy variational principle with large displacement. Under the condition of further introduction, the equilibrium differential based on classical deflection theory Based on the analysis of differential equations, the static characteristics of prestressed suspension bridge and its difference with ordinary suspension bridge are discussed. Numerical examples of the suspension bridge show that the prestressed suspension bridge due to the existence of anti-wind cable and the structure Pre-tension, in improving the structural rigidity, reduce the bending moment of stiffener has some advantages.