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

【摘要】：橋梁荷載試驗(yàn)是對橋梁健康狀況了解的一個(gè)重要手段,也是基于橋梁全壽命理念進(jìn)行橋梁管理與養(yǎng)護(hù)的一個(gè)重要手段。它是一門直接服務(wù)工程實(shí)踐的一項(xiàng)細(xì)致復(fù)雜的工作,涉及橋梁的設(shè)計(jì)計(jì)算理論、實(shí)驗(yàn)測試技術(shù)、儀器儀表性能、數(shù)理統(tǒng)計(jì)分析、現(xiàn)場試驗(yàn)組織等方面,具有綜合性、復(fù)雜性、應(yīng)用性。本文以邯鄲市某中承式鋼管混凝土拱橋?yàn)楣こ瘫尘?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(dòng)靜載試驗(yàn)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(jì)算模型,根據(jù)橋梁結(jié)構(gòu)特性和內(nèi)力計(jì)算確定靜載試驗(yàn)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(diǎn)的布置。在靜載試驗(yàn)測得的橋梁在控制截面中的實(shí)際應(yīng)變和撓度等實(shí)測值與計(jì)算模型的理論值進(jìn)行分析比對,結(jié)合交通運(yùn)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(biāo)準(zhǔn),確定橋梁的實(shí)際承載能力滿足正常通車要求。利用有限元軟件對該橋進(jìn)行理論模態(tài)分析,計(jì)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(dòng)載試驗(yàn)測得實(shí)測值與理論值比較接近,且實(shí)測值大于理論值,說明結(jié)構(gòu)整體受力良好。動(dòng)載試驗(yàn)通過脈動(dòng)試驗(yàn)和行車試驗(yàn)檢測了橋梁的應(yīng)變增大系數(shù)和自振頻率,且得出應(yīng)變增大系數(shù)基本處于合理范圍之內(nèi)。通過靜載、動(dòng)載試驗(yàn)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(jì)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(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U446;U448.22

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相關(guān)期刊論文 前1條

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本文編號：1763531