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首页> 外文会议>Innovative infrastructures - toward human urbanism : Report >Construction of Cable-Stayed Bridges Built on Temporary Supports
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Construction of Cable-Stayed Bridges Built on Temporary Supports

机译：基于临时支撑的斜拉桥施工

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One of the fastest and more economical ways of erecting cable-stayed bridges consists on buildingrnthe bridge deck on a set of temporary and permanent supports. Then, the stays are successivelyrnplaced and tensioned according to a predefined tensioning sequence and the static scheme of thernstructure is successively changed. Despite this technique has been used for erecting many cablestayedrnbridges worldwide, no specific research referring to the modelling of the temporary supportsrnerection method has been found in existing literature. In fact, most of the literature is based on thernalternative erection technique, the cantilever erection method, and the temporary supports erectionrnmethod is usually only described in general terms. This paper aims to fill this gap by providing anrnalgorithm specifically designed to model the construction process of cable-stayed bridges built onrntemporary supports from a backward approach. This algorithm can be efficiently used to define therninitial design of the tensioning sequence and, because of its simplicity; it can be easily implementedrnin any structural code that enables the modelling of the prestressing of the stays by means ofrnimposed strains or imposed temperature increments.
机译：架设斜拉桥最快，更经济的方法之一是在桥面板上设置一组临时和永久支撑。然后，按照预定义的张紧顺序对支柱进行连续放置和张紧，并依次改变结构的静态方案。尽管该技术已被用于在世界范围内架设许多斜拉桥，但在现有文献中尚未找到有关临时支护方法建模的具体研究。实际上，大多数文献是基于交替架设技术，悬臂架设方法，并且临时支撑架设方法通常仅是笼统地描述。本文旨在通过提供专门为后向方法在临时支座上建造的斜拉桥建模过程建模的算法而填补这一空白。由于其简单性，该算法可以有效地用于定义张紧顺序的初始设计。它可以很容易地在任何结构代码中实施，该代码可以通过施加应变或施加温度增量来对撑杆的预应力进行建模。

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