本文選題：鋼管混凝土拱橋 + 靜載試驗　； 參考：《河北工業(yè)大學》2015年碩士論文

【摘要】：橋梁荷載試驗是對橋梁健康狀況了解的一個重要手段,也是基于橋梁全壽命理念進行橋梁管理與養(yǎng)護的一個重要手段。它是一門直接服務工程實踐的一項細致復雜的工作,涉及橋梁的設(shè)計計算理論、實驗測試技術(shù)、儀器儀表性能、數(shù)理統(tǒng)計分析、現(xiàn)場試驗組織等方面,具有綜合性、復雜性、應用性。本文以邯鄲市某中承式鋼管混凝土拱橋為工程背景,在總結(jié)了鋼管混凝土拱橋的發(fā)展歷史及鋼管混凝土拱橋動靜載試驗理論的基礎(chǔ)上做了如下研究工作:利用有限元分析軟件Midas civil建立鋼管混凝土拱橋的結(jié)構(gòu)計算模型,根據(jù)橋梁結(jié)構(gòu)特性和內(nèi)力計算確定靜載試驗的加載工況、各工況下的加載與卸載過程與量級、以及主要控制截面和截面中測點的布置。在靜載試驗測得的橋梁在控制截面中的實際應變和撓度等實測值與計算模型的理論值進行分析比對,結(jié)合交通運輸部2011年最新頒布的公路橋梁技術(shù)狀況及承載力評定標準,確定橋梁的實際承載能力滿足正常通車要求。利用有限元軟件對該橋進行理論模態(tài)分析,計算出該橋的理論自振頻率和振型,分析得出該橋的面內(nèi)剛度大于面外剛度,符合鋼管混凝土拱橋的振型規(guī)律,并通過動載試驗測得實測值與理論值比較接近,且實測值大于理論值,說明結(jié)構(gòu)整體受力良好。動載試驗通過脈動試驗和行車試驗檢測了橋梁的應變增大系數(shù)和自振頻率,且得出應變增大系數(shù)基本處于合理范圍之內(nèi)。通過靜載、動載試驗的測試及分析,可以得出主橋和引橋的承載能力滿足設(shè)計要求,滿足正常通車要求。
[Abstract]:Bridge load test is not only an important means to understand the bridge health condition, but also an important means of bridge management and maintenance based on the concept of bridge life.It is a meticulous and complex work in the practice of direct service engineering. It involves the design and calculation theory of bridge, experimental test technology, instrument performance, mathematical statistics and analysis, field test organization, etc., it is comprehensive and complex.Application.This paper takes a middle through concrete filled steel tube arch bridge in Handan as the engineering background.On the basis of summarizing the development history of CFST arch bridge and the theory of static and static load test of CFST arch bridge, the following research work is done: the structural calculation model of CFST arch bridge is established by using finite element analysis software Midas civil.According to the characteristics of the bridge structure and the calculation of the internal force, the loading condition of the static load test, the loading and unloading process and the order of magnitude of the loading and unloading under each working condition, as well as the arrangement of the measuring points in the main control section and the section are determined.The actual strain and deflection of the bridge measured in the static load test in the control section are analyzed and compared with the theoretical values of the calculation model, and combined with the latest technical status of the highway bridge issued by the Ministry of Communications and Transport in 2011 and the evaluation standard for the bearing capacity.Determine the actual bearing capacity of the bridge to meet the normal traffic requirements.The theoretical modal analysis of the bridge is carried out by using the finite element software, and the theoretical natural vibration frequency and vibration mode of the bridge are calculated. It is concluded that the in-plane stiffness of the bridge is greater than that of the out-of-plane stiffness, which accords with the vibration pattern of the concrete-filled steel tube arch bridge.The measured value is close to the theoretical value through the dynamic load test, and the measured value is larger than the theoretical value, which shows that the whole structure has a good force.The dynamic load test detects the strain increasing coefficient and natural vibration frequency of the bridge by pulsating test and driving test, and obtains that the strain increase coefficient is basically within a reasonable range.Through the test and analysis of static load and dynamic load test, it can be concluded that the bearing capacity of the main bridge and the approach bridge can meet the design requirements and meet the requirements of normal traffic.
【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U446;U448.22

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本文編號：1763531