本文選題：斜拉橋 + 運(yùn)營(yíng)期��； 參考：《湖南科技大學(xué)》2014年碩士論文

【摘要】：運(yùn)營(yíng)多年的斜拉橋，其斜拉索索力、塔梁線形及內(nèi)力偏離成橋狀態(tài)，可以通過(guò)調(diào)索改變其不利受力狀態(tài)，同時(shí)實(shí)施調(diào)索施工控制確保調(diào)索效果與調(diào)索過(guò)程安全，，而國(guó)內(nèi)外對(duì)于既有斜拉橋調(diào)索施工控制技術(shù)的研究案例較少，研究尚處于發(fā)展初期。本文以湘潭三大橋主橋調(diào)索工程為背景，對(duì)運(yùn)營(yíng)期斜拉橋調(diào)索施工控制技術(shù)展開(kāi)研究，主要研究?jī)?nèi)容有： （1）介紹關(guān)于斜拉橋調(diào)索的國(guó)內(nèi)外研究現(xiàn)狀及經(jīng)典的調(diào)索實(shí)例；分析運(yùn)營(yíng)期斜拉橋梁換索、調(diào)索的原因及調(diào)索的目的；闡述斜拉橋調(diào)索設(shè)計(jì)常規(guī)做法以及調(diào)索施工監(jiān)控的必要性；說(shuō)明調(diào)索施工控制的目的與任務(wù)。 （2）建立調(diào)索施工控制理論及方法，主要包括調(diào)索施工控制理論、調(diào)索施工控制結(jié)構(gòu)分析方法；闡述調(diào)索優(yōu)化的影響矩陣法，提出調(diào)索優(yōu)化目標(biāo)以及調(diào)索順序的確定方法。 （3）結(jié)合湘潭三大橋調(diào)索實(shí)例，分析調(diào)索前主橋技術(shù)狀態(tài)，建立與實(shí)際狀況相接近的有限元分析模型，確定一個(gè)合理的調(diào)索目標(biāo)狀態(tài)，以影響矩陣?yán)碚摓榛A(chǔ)，求解索力調(diào)整量以及調(diào)索順序。 （4）建立湘潭三大橋調(diào)索施工監(jiān)測(cè)體系，包括塔梁應(yīng)力監(jiān)測(cè)、斜拉索索力監(jiān)測(cè)、主梁線形及塔偏位監(jiān)測(cè)以及溫度監(jiān)測(cè)等。 （5）分析湘潭三大橋主橋調(diào)索施工監(jiān)控結(jié)果，并對(duì)調(diào)索施工監(jiān)控方法進(jìn)行總結(jié)與探討。 通過(guò)建立運(yùn)營(yíng)期斜拉橋調(diào)索施工控制理論及方法，建立湘潭三大橋調(diào)索施工監(jiān)測(cè)體系，并應(yīng)用于湘潭三大橋主橋運(yùn)營(yíng)期實(shí)際調(diào)索過(guò)程中，有效改善了湘潭三大橋的內(nèi)力與線形，緩解了該橋不利受力狀態(tài)，且調(diào)索過(guò)程安全，達(dá)到了調(diào)索預(yù)期效果，同時(shí)，本文所作研究為類(lèi)似運(yùn)營(yíng)期斜拉橋調(diào)索施工控制提供了一個(gè)工程借鑒。
[Abstract]:For many years of operation of cable-stayed bridge, its cable-stayed cable force, tower beam line shape and internal force deviate from the bridge state, it can change its unfavorable stress state by adjusting cable, and at the same time, it can carry out the cable adjustment construction control to ensure the effect of cable adjustment and the safety of the process of cable adjustment. At home and abroad, there are few research cases on cable-adjusting construction control technology of existing cable-stayed bridges, and the research is still in the early stage of development. In this paper, based on the main bridge of Xiangtan third Bridge, the construction control technology of cable adjustment of cable-stayed bridge during operation period is studied. The main research contents are as follows: 1) introduce the domestic and international research status of cable adjustment of cable-stayed bridge and the classic example of cable adjustment, analyze the reasons of cable change, the reason and purpose of cable adjustment of cable-stayed bridge, expound the conventional method of cable adjustment design of cable-stayed bridge and the necessity of monitoring and control of cable adjustment construction. The purpose and task of cable-adjusting construction control are explained. 2) establishing the construction control theory and method of cable adjustment, mainly including the construction control theory of cable adjustment, the analysis method of construction control structure of cable adjustment, the influence matrix method of cable adjustment optimization, and the method of determining the optimization objective and the order of cable adjustment. Combined with the example of cable adjustment of Xiangtan third Bridge, the technical state of the main bridge before cable adjustment is analyzed, and the finite element analysis model is established, which is close to the actual situation, and a reasonable target state of cable adjustment is determined, which is based on the theory of influence matrix. The adjustment quantity of cable force and the order of cable adjustment are solved. The monitoring system for the construction of the third Xiangtan Bridge is established, including the stress monitoring of the tower beam, the cable force monitoring, the alignment and tower deflection monitoring of the main beam and the temperature monitoring, etc. This paper analyzes the monitoring results of the construction of the main bridge of Xiangtan third Bridge, and summarizes and discusses the monitoring methods of the construction of the cables. Based on the construction control theory and method of the cable-stayed bridge in operation period, the monitoring system of the cable-adjusted construction of the Xiangtan third Bridge is established, and it is applied to the actual cable-adjusting process of the main bridge of the Xiangtan third Bridge, which effectively improves the internal force and the alignment of the Xiangtan third Bridge. The unfavorable stress state of the bridge is alleviated, and the process of cable adjustment is safe, and the expected effect is achieved. At the same time, the research in this paper provides an engineering reference for the construction control of cable-stayed bridge in similar operation period.
【學(xué)位授予單位】：湖南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U445.4;U448.27

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