鳳凰三橋鋼箱拱肋溫度效應(yīng)研究
發(fā)布時(shí)間：2018-11-27 12:14
【摘要】：自大跨度橋梁建成以來，國(guó)內(nèi)外研究橋梁溫度效應(yīng)的專家不乏少數(shù)，但大部分都集中在混凝土溫度效應(yīng)的研究，針對(duì)鋼結(jié)構(gòu)溫度效應(yīng)的研究相對(duì)較少，至于鋼箱拱肋溫度效應(yīng)的研究就更加少之又少了。 本文主要基于鳳凰三橋鋼箱拱肋溫度監(jiān)測(cè)結(jié)果對(duì)其溫度效應(yīng)進(jìn)分析與研究。鳳凰三橋?yàn)橹谐惺较禇U拱橋，其拱肋是高度比寬度大的高窄鋼箱，而且拱肋繞順橋向存在1/5的旋轉(zhuǎn)角，造成在溫度效應(yīng)下鋼箱拱肋產(chǎn)生應(yīng)力的同時(shí)，且各點(diǎn)的位移是空間位移，顯然并不類似傳統(tǒng)的扁平鋼箱梁，其溫度效應(yīng)影響要比普通扁平鋼箱梁復(fù)雜得多。 本文主要內(nèi)容有：鋼箱拱肋溫度場(chǎng)的測(cè)試；基于溫度場(chǎng)的實(shí)測(cè)數(shù)據(jù)擬合溫度場(chǎng)分布曲線，以適用于溫度效應(yīng)的計(jì)算；施工過程中為確保鋼拱精準(zhǔn)合攏，考慮了溫度效應(yīng)及對(duì)策，包括溫度作用下拱肋合攏定位坐標(biāo)的確定，拱肋臨時(shí)拉索索力的確定；成橋狀態(tài)下系統(tǒng)溫度與溫度梯度對(duì)吊桿應(yīng)力和鋼拱應(yīng)力位移的影響及對(duì)策，，并對(duì)比了四種規(guī)范模式與本文擬合溫度分布模式下的計(jì)算結(jié)果。 全文以鳳凰三橋中承式鋼箱系桿拱橋工程為研究背景，針對(duì)高難度的大噸位整體提升施工方案，遵循“測(cè)試——分析——對(duì)策”步驟，全面分析了鳳凰三橋的溫度效應(yīng)影響，并利用溫度效應(yīng)解決了工程實(shí)踐過程中的技術(shù)難題，從而更好地為工程建設(shè)服務(wù)。這一特定的案例必將為其它工程提供借鑒和參考價(jià)值。
[Abstract]:Since the construction of the bridge, there are few experts at home and abroad to study the temperature effect of the bridge, but most of them are focused on the temperature effect of concrete, and the research on the temperature effect of steel structure is relatively few. As for the temperature effect of steel box arch rib, the research is even less. Based on the temperature monitoring results of steel box arch rib of Phoenix third Bridge, the temperature effect is analyzed and studied in this paper. Phoenix third Bridge is a middle through tied arch bridge. Its arch rib is a high narrow steel box with large height than width, and the arch rib has a rotation angle of 1 / 5 around the downstream bridge, which results in the stress of the steel box arch rib under the effect of temperature at the same time. The displacement of each point is spatial displacement, which is obviously not similar to the traditional flat steel box girder, and the influence of temperature effect is much more complicated than that of the ordinary flat steel box girder. The main contents of this paper are as follows: testing the temperature field of steel box arch rib, fitting the distribution curve of temperature field based on the measured data of temperature field, so as to apply to the calculation of temperature effect; In order to ensure the precise closure of the steel arch, the temperature effect and its countermeasures are considered, including the determination of the positioning coordinate of the arch rib closure under the action of temperature, and the determination of the temporary cable pulling force of the arch rib; The effects of system temperature and temperature gradient on stress and displacement of suspension rod and steel arch under the condition of bridge completion are discussed and the calculation results of four standard models and the temperature distribution model are compared. Based on the research background of the through steel box tie arch bridge of Phoenix third Bridge, this paper, in view of the high difficulty construction scheme of large tonnage integral lifting, follows the steps of "test-analysis-countermeasure", and comprehensively analyzes the influence of temperature effect on Phoenix third Bridge. The temperature effect is used to solve the technical problems in the process of engineering practice, so as to better serve the engineering construction. This particular case will provide reference and reference value for other projects.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441.5
本文編號(hào)：2360719
[Abstract]:Since the construction of the bridge, there are few experts at home and abroad to study the temperature effect of the bridge, but most of them are focused on the temperature effect of concrete, and the research on the temperature effect of steel structure is relatively few. As for the temperature effect of steel box arch rib, the research is even less. Based on the temperature monitoring results of steel box arch rib of Phoenix third Bridge, the temperature effect is analyzed and studied in this paper. Phoenix third Bridge is a middle through tied arch bridge. Its arch rib is a high narrow steel box with large height than width, and the arch rib has a rotation angle of 1 / 5 around the downstream bridge, which results in the stress of the steel box arch rib under the effect of temperature at the same time. The displacement of each point is spatial displacement, which is obviously not similar to the traditional flat steel box girder, and the influence of temperature effect is much more complicated than that of the ordinary flat steel box girder. The main contents of this paper are as follows: testing the temperature field of steel box arch rib, fitting the distribution curve of temperature field based on the measured data of temperature field, so as to apply to the calculation of temperature effect; In order to ensure the precise closure of the steel arch, the temperature effect and its countermeasures are considered, including the determination of the positioning coordinate of the arch rib closure under the action of temperature, and the determination of the temporary cable pulling force of the arch rib; The effects of system temperature and temperature gradient on stress and displacement of suspension rod and steel arch under the condition of bridge completion are discussed and the calculation results of four standard models and the temperature distribution model are compared. Based on the research background of the through steel box tie arch bridge of Phoenix third Bridge, this paper, in view of the high difficulty construction scheme of large tonnage integral lifting, follows the steps of "test-analysis-countermeasure", and comprehensively analyzes the influence of temperature effect on Phoenix third Bridge. The temperature effect is used to solve the technical problems in the process of engineering practice, so as to better serve the engineering construction. This particular case will provide reference and reference value for other projects.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441.5
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