【摘要】：本文結(jié)合依蘭牡丹江大橋主橋的拆除施工,對中承式鋼管混凝土拱橋的拆除方法、施工控制及施工階段受力安全性能進行研究。 由于依蘭牡丹江大橋主橋的工作性能已不能滿足運營要求,需要拆除重建。本文結(jié)合目前兩類主流橋梁拆除方法——爆破法和機械拆除法,根據(jù)依蘭牡丹江大橋自身受力特點、拆除要求及環(huán)境限制,確定了拆除方案。然后按照拆除方案,運用空間有限元軟件Midas/Civil對拆除過程各個階段進行模擬,分析溫度及風荷載對結(jié)構(gòu)受力的影響,同時對拱肋變形及應(yīng)力的變化規(guī)律、拱腳轉(zhuǎn)角及水平推力進行分析。 為了保證橋梁順利安全拆除,根據(jù)拆除方案建立完備的施工監(jiān)控系統(tǒng),在施工過程實測溫度及風速,調(diào)整模型參數(shù),確定拆除過程中變形及應(yīng)力限值,將數(shù)據(jù)實測值與理論值進行對比分析,構(gòu)成施工監(jiān)控預(yù)警系統(tǒng),確保拆除施工的順利進行。最后對拆除過程中保留的主要受力構(gòu)件——拱肋的受力安全性能進行分析,拱肋在拆除過程中始終處于安全可控的狀態(tài)。 通過研究表明,根據(jù)不同的實際工程要選取與其相適應(yīng)的施工方法及工藝,并要考慮到可能影響到結(jié)構(gòu)的自然因素,利用有限元軟件對施工過程模擬分析可以對施工方案提供建議,本文所研究的內(nèi)容對同類橋梁的拆除施工具有一定的參考價值。
[Abstract]:Combined with the demolition construction of the main bridge of Yilan Mudanjiang Bridge, this paper studies the demolition method, construction control and stress safety performance of the through concrete filled steel tube arch bridge. Since the main bridge of Yilan Mudanjiang Bridge can not meet the operational requirements, it is necessary to demolish and rebuild it. Combined with two kinds of main methods of bridge demolition at present-blasting method and mechanical demolition method, according to the mechanical characteristics of Yilan Mudanjiang Bridge, demolition requirements and environmental restrictions, the demolition scheme is determined. Then according to the demolition scheme, using the spatial finite element software Midas/Civil to simulate the various stages of the demolition process, analyze the influence of temperature and wind load on the stress of the structure, and at the same time, analyze the deformation and stress variation of the arch rib. The angle and horizontal thrust of arch foot are analyzed. In order to ensure the smooth and safe demolition of the bridge, a complete construction monitoring system is established according to the demolition scheme. The temperature and wind speed during the construction process are measured, the model parameters are adjusted, and the deformation and stress limit values during the demolition process are determined. By comparing the measured data with the theoretical values, a construction monitoring and warning system is constructed to ensure the smooth construction of demolition construction. Finally, the mechanical safety performance of arch rib, which is the main force member retained in the process of demolition, is analyzed. The arch rib is always in a safe and controllable state during the process of demolition. The research shows that according to different practical projects, the construction methods and techniques should be selected, and the natural factors that may affect the structure should be taken into account. Using finite element software to simulate the construction process can provide suggestions for the construction scheme. The contents of this paper have certain reference value for the similar bridge demolition and construction.
【學位授予單位】：東北林業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.6

【參考文獻】

相關(guān)期刊論文 前1條

1 王文君;;系桿拱橋拆除施工技術(shù)探討[J];交通科技;2010年S2期

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本文編號：2177171