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閆   武 ， 高啟戰

 

（中交一公局集團有限公司 ，北京 100101)

摘   要： 以永定河特大橋為研究對象，采用 Midas/Civil 軟件建立橋梁有限元仿真模型，對橋體的無支架工藝施工過程完成模擬和計算分析。通過對比有限元法計算結果和監測數據，研究斜拉索臨時支撐施工方法對模 型斜拉索的索力、無應力索長以及橋梁線形和內力的影響規律。結果表明：在多次張拉后，索力仍然達到了理想效果，并且橋梁線型和應力的變化均受到索力的影響，且最終成橋時的實測數據與設計值相符，保證橋梁的 施工和運營過程中能夠更加安全高效。

關鍵詞：斜拉橋 ；模擬分析 ；無支架安裝 ；多次張拉

中圖分類號：U448 . 27            

文獻標志碼：A           

文章編號： 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

作者簡介： 閆    武  (1985—) ,   男 ，本科 ，高級工程師 ，研 究方向： 交通土建。

收稿日期：2023 - 08 - 16