集中力作用下索的静力特性精细化分析

悬索桥施工中主梁吊装及自锚式悬索桥吊杆张拉,都需要计算和监测集中力作用下悬索的索力和变形.论文推导了悬索在集中力作用下的无量纲形式的平衡方程和积分形式的协调方程,把协调方程在线性和非线性条件的索力增量方程分别转化为一次、二次和三次方程进行求解,然后对荷载位置、荷载大小以及艾维参数对线性和非线性条件下的索力增量的影响进行精细化分析.研究表明：各种条件下索力误差较小,不考虑索的增长条件下,索的变形特征主要是几何构形变化,荷我在时,正挠度和负挠度分别达到了最大值.

Designing Refinement About Cable Static Performance Under The Action of Concentrated Load

It is necessary to calculate and monitor the cable force and the deformation under a concentrated force when hoisting girders of suspension bridge and tensile a hanger of a self-anchored suspension bridge in a construction process. This paper deduces the dimensionless forms of equilibrium equations and integral form of coordinate equation about the suspended cable under a concentrated force, and changes the cable force increment equation of the coordinate equation in linear and nonlinear conditions into a linear equation, a quadratic equation and a cubic equation, respectively, and then gets the solution for these equations. The influence of cable force increment in linear and nonlinear conditions because of the load position, the magnitude of force, and Irvine parameter were analyzed. The research showed that the relative increment of the cable force was smaller under different conditions. Without taking the increment of the length of a cable into account, the main characteristic of a cable deformation is the change of geometric configuration. When the load was, the positive and negative deflections reach the maximum values.