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闫   武 ， 高启战

 

（中交一公局集团有限公司 ，北京 100101)

摘   要： 以永定河特大桥为研究对象，采用 Midas/Civil 软件建立桥梁有限元仿真模型，对桥体的无支架工艺施工过程完成模拟和计算分析。通过对比有限元法计算结果和监测数据，研究斜拉索临时支撑施工方法对模 型斜拉索的索力、无应力索长以及桥梁线形和内力的影响规律。结果表明：在多次张拉后，索力仍然达到了理想效果，并且桥梁线型和应力的变化均受到索力的影响，且最终成桥时的实测数据与设计值相符，保证桥梁的 施工和运营过程中能够更加安全高效。

关键词：斜拉桥 ；模拟分析 ；无支架安装 ；多次张拉

中图分类号：U448 . 27            

文献标志码：A           

文章编号： 1005- 8249   (2025)  02- 0138- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .02.023

 

YAN Wu ,  GAO Qizhan

(China Communications First Engineering Bureau Group Co . ,  Ltd . ,  Beijing 100101 ,  China)

Abstract: Taking the Yongding River Grand Bridge as the research object, a new type of temporary support construction method for inclined cables is studied. Establish a finite element simulation model of the bridge using Midas/Civil software, and complete the simulation and calculation analysis of the unsupported construction process of the bridge body. By comparing the results of finite element method calculations and monitoring data, this study investigates the influence of temporary support construction methods on the cable force, unstressed cable length, bridge shape, and internal forces of the model cable. The results showed that after multiple stretches, the cable force still achieved the desired effect, and the changes in bridge shape and stress were affected by the cable force. The measured data at the final completion of the bridge matched the design values, ensuring that the construction and operation of the bridge could be safer and more efficient.

Keywords: cable-stayed bridge; MIDAS/Civil; simulation analysis; unsupported installation; multiple tensioning

作者简介： 闫    武  (1985—) ,   男 ，本科 ，高级工程师 ，研 究方向： 交通土建。

收稿日期：2023 - 08 - 16