廣元市虎跳大橋荷載檢測試驗研究
發(fā)布時間：2018-11-05 18:58
【摘要】：隨著我國經(jīng)濟蓬勃發(fā)展,對橋梁工程的施工質(zhì)量以及運營質(zhì)量有了更高的要求。很多年以來我國不間斷地出現(xiàn)了許多重大的橋梁安全事故,不僅造成了重大的經(jīng)濟損失和人員傷亡,而且在社會中造成了極其不好的影響。為了充分保障橋梁的安全運營,杜絕橋梁安全事故的發(fā)生,橋梁荷載檢測在其中就發(fā)揮著日益重要的作用。橋梁荷載檢測的出發(fā)點就是為了檢驗橋梁工程的設(shè)計質(zhì)量,施工質(zhì)量,并確定橋梁工程的可靠性是否滿足相關(guān)要求,同時也便于我們更好地了解橋梁的受力性能,判斷橋梁的實際承載能力,評價橋梁結(jié)構(gòu)在當(dāng)前設(shè)計荷載下的工作性能是否滿足運營要求。論文以虎跳大橋為研究對象,對虎跳大橋梁板和橋墩的砼強度進行研究,根據(jù)實測的混凝土強度值來評定虎跳大橋的施工砼強度是否達(dá)到相應(yīng)標(biāo)準(zhǔn)�；陟o載試驗和動載試驗研究了4輛350KN載重汽車以偏載和中載的加載方式對虎跳大橋進行加載以及載重汽車以不同行駛速度對虎跳大橋進行跑車試驗和跳車試驗�；诓煌虞d方式和不同行駛速度下虎跳大橋試驗截面應(yīng)變值、撓度值和沖擊系數(shù)值的變化,來評定虎跳大橋承載能力和工作狀態(tài)。分析結(jié)果表明：①虎跳大橋梁板和橋墩的砼強度滿足《混凝土結(jié)構(gòu)設(shè)計規(guī)范》(GB 50010-2010)的相關(guān)要求。②3個試驗工況的應(yīng)變和撓度校驗系數(shù)都小于1.0,滿足《公路橋梁承載能力檢測評定規(guī)程》(JTG/T J21-2011)對校驗系數(shù)的規(guī)定。A-A截面和B-B截面的應(yīng)變校驗系數(shù)值處于一個正常區(qū)間,而C-C截面的應(yīng)變校驗系數(shù)值則偏大。③隨著車速的增加,虎跳大橋的沖擊系數(shù)逐漸變大,有單調(diào)提高的趨勢。
[Abstract]:With the booming development of our economy, the construction quality and operation quality of bridge engineering have higher requirements. For many years, there have been many major bridge safety accidents in our country, which not only caused great economic losses and casualties, but also caused extremely bad effects in the society. In order to ensure the safe operation of bridges and prevent the occurrence of bridge safety accidents, bridge load detection plays an increasingly important role. The starting point of bridge load detection is to test the design quality and construction quality of bridge engineering, and to determine whether the reliability of bridge engineering meets the relevant requirements, and at the same time, it is convenient for us to better understand the mechanical performance of bridges. Judging the actual bearing capacity of the bridge and evaluating whether the working performance of the bridge structure under the current design load meets the operational requirements. This paper takes the Huxiao Bridge as the research object, studies the concrete strength of the bridge slab and pier, and evaluates whether the construction concrete strength of the Hujiao Bridge reaches the corresponding standard according to the measured concrete strength value. Based on the static load test and dynamic load test, the paper studies the loading of four 350KN heavy vehicles to the Tiger jump bridge by the way of partial and medium load, and the sports car test and the jump test of the Tiger jump bridge with different driving speed. Based on the variation of the strain value, deflection value and impact coefficient value of the test section of the Tiger jump Bridge under different loading modes and different driving speeds, the bearing capacity and working state of the bridge are evaluated. The results show that: 1 the concrete strength of the bridge slabs and piers meets the requirements of the Design Code for concrete structures (GB 50010-2010). The strain and deflection check coefficients of 23 test conditions are less than 1.0. To meet the requirements of check coefficient in JTG/T J21-2011. The strain check coefficient values of A-A section and B-B section are in a normal range. However, the strain check coefficient of C-C section is larger. 3 with the increase of speed, the impact coefficient of Hujiao Bridge becomes larger and more monotonous.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U446
，
本文編號：2313058
[Abstract]:With the booming development of our economy, the construction quality and operation quality of bridge engineering have higher requirements. For many years, there have been many major bridge safety accidents in our country, which not only caused great economic losses and casualties, but also caused extremely bad effects in the society. In order to ensure the safe operation of bridges and prevent the occurrence of bridge safety accidents, bridge load detection plays an increasingly important role. The starting point of bridge load detection is to test the design quality and construction quality of bridge engineering, and to determine whether the reliability of bridge engineering meets the relevant requirements, and at the same time, it is convenient for us to better understand the mechanical performance of bridges. Judging the actual bearing capacity of the bridge and evaluating whether the working performance of the bridge structure under the current design load meets the operational requirements. This paper takes the Huxiao Bridge as the research object, studies the concrete strength of the bridge slab and pier, and evaluates whether the construction concrete strength of the Hujiao Bridge reaches the corresponding standard according to the measured concrete strength value. Based on the static load test and dynamic load test, the paper studies the loading of four 350KN heavy vehicles to the Tiger jump bridge by the way of partial and medium load, and the sports car test and the jump test of the Tiger jump bridge with different driving speed. Based on the variation of the strain value, deflection value and impact coefficient value of the test section of the Tiger jump Bridge under different loading modes and different driving speeds, the bearing capacity and working state of the bridge are evaluated. The results show that: 1 the concrete strength of the bridge slabs and piers meets the requirements of the Design Code for concrete structures (GB 50010-2010). The strain and deflection check coefficients of 23 test conditions are less than 1.0. To meet the requirements of check coefficient in JTG/T J21-2011. The strain check coefficient values of A-A section and B-B section are in a normal range. However, the strain check coefficient of C-C section is larger. 3 with the increase of speed, the impact coefficient of Hujiao Bridge becomes larger and more monotonous.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U446
，
本文編號：2313058
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