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一、主索计算的几个假定 与计算简图的选取 计算主索时,可引入如下的几个假定: 1.支承于两塔架上、两端固定于地垄(或地锚)的主索是三跨连续的。计算时,通常忽略两边跨(锚固段)对中间跨的影响(当锚固长度较长时,这种影响则不能忽略,见六)和不计两塔架的位移,而把主索与索鞍(在塔架顶处)的接触点视为不动点,将主索按两端固定的单跨柔索计算,如图1、b)所示。
First, the main cable calculation of several assumptions and calculation of the selection of the main cable calculation, you can introduce the following assumptions: 1. Supported in the two towers, both ends of the ridge fixed to the ground (or anchor) of the Lord The cable is three-span continuous. The calculation usually neglects the influence of the span (anchorage section) on both sides of the span (when the anchorage length is longer, this effect can not be ignored, see VI) and ignores the displacement of both towers, The contact point at the top of the tower is regarded as the fixed point, and the main cable is calculated according to the single-span flexible cable fixed at both ends, as shown in Figure 1, b).