鋼索懸臂架設橋梁施工階段結構分析之研究

Study on Cantilever Erection by Cable-Supported for the Steel Bridges

鄭存迪(Tsun-Ti Cheng)

指導教授 ： 宋裕祺

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2010年)

https://doi.org/10.6841/NTUT.2010.00626

摘要

鋼索懸臂架設橋梁施工階段控制是工程師相當棘手的問題。現場施工吊裝節塊過程容易出現施工誤差，如果未能即時修正將導致後續階段施工困難。市面上有限元素分析軟體相當繁雜，但多數軟體未有施工階段分析功能，造成工程師對實際施工階段之分析無法掌握。
本文係以二維鋼斜張橋採用桿件內力疊加法及影響矩陣法進行倒裝施工階段分析與具有施工階段功能之Midas Civil正裝、倒裝法分析所得之值做比對，比對結果本研究之方法與Midas Civil正裝法吻合，因此本方法可有效運用一般未有施工階段功能之結構分析軟體。最後，利用本研究之方法進行兩個實際案例施工階段分析，案例一：中山高五楊段跨越國道一號跨越橋進行施工階段模擬分析，結果可供實際施工之參考；案例二：社子大橋參照實際施工步驟模擬進行分析並與施工單位提送之計算書進行比對，結果顯示各施工階段之鋼索軸力大致吻合，證明本文所提方法確屬可行，期望本文所得成果能對國內鋼索懸臂架設工法的施工分析有所助益。

關鍵字

懸臂施工法 ； 施工階段

並列摘要

Serving as a base of investigation on each construction stage, the structural analysis of the cantilever erection for the steel bridges using cable-supported method benefits the engineers a good control on minimizing the possible error induced by erection. Unfortunately, little qualified commercial software could fulfill the requirements for such kind of analysis. To overcome this awkward situation, this thesis reviewed the theoretical background and completed the analysis just through the common software unqualified.
The influence matrix relating to each erection stage of the bridges was formulated to get the structural response and sequentially superimposed with those in previous stages. By this method, a series of structural analyses for the erection stages reverse to the sequence of actual construction work, known as the backward analysis, was conducted. One case of a bridge with steel box girders and the other one of a steel cable-stayed bridge in Taiwan were studied and discussed. The result obtained was compared with that from the qualified software of MIDAS/CIVIL. A consequence of little discrepancy between these two results can be found. It shows that this thesis helps the engineers do the complicated analysis even through the software without the function of construction analysis.

並列關鍵字

Cantilever Erection Method ； Construction stage

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