本文選題：斜拉橋　切入點(diǎn)：荷載試驗(yàn)　出處：《重慶交通大學(xué)》2014年碩士論文

【摘要】：荷載試驗(yàn)是一門實(shí)踐性很強(qiáng)的科學(xué)技術(shù),其涉及的內(nèi)容包含結(jié)構(gòu)設(shè)計(jì)和施工工藝等,具有較強(qiáng)的綜合性、應(yīng)用性和復(fù)雜性。對(duì)于新型結(jié)構(gòu)荷載試驗(yàn)是一種科學(xué)研究性試驗(yàn)。斜拉橋以其自身具有的優(yōu)越性得到廣泛的推廣應(yīng)用,現(xiàn)代斜拉橋的發(fā)展越來越大跨徑化。本文以廈漳跨海大橋北汊斜拉橋現(xiàn)場(chǎng)試驗(yàn)為依托對(duì)大跨徑斜拉橋的荷載試驗(yàn)進(jìn)行了研究。 本文對(duì)橋梁靜動(dòng)載試驗(yàn)方法進(jìn)行了歸納總結(jié),并對(duì)試驗(yàn)方案的制定以及橋梁結(jié)構(gòu)分析有限元法進(jìn)行了研究。結(jié)合廈漳跨海大橋北汊斜拉橋,根據(jù)該橋的特點(diǎn)進(jìn)行有限元建模,采用有限元方法對(duì)該橋進(jìn)行理論計(jì)算和分析得到相應(yīng)的理論計(jì)算數(shù)據(jù),設(shè)計(jì)出該橋靜力荷載試驗(yàn)方案和動(dòng)力荷載的試驗(yàn)方案,方案中對(duì)荷載試驗(yàn)工況、靜動(dòng)載試驗(yàn)及撓度測(cè)點(diǎn)布置進(jìn)行了研究。 在保證荷載試驗(yàn)效果的前提下,將各工況控制截面的實(shí)測(cè)變形與理論計(jì)算值進(jìn)行對(duì)比,計(jì)算結(jié)構(gòu)驗(yàn)校系數(shù),對(duì)結(jié)構(gòu)實(shí)際承載能力進(jìn)行了評(píng)定,確保結(jié)構(gòu)能滿足承載能力要求。同時(shí)對(duì)橋梁結(jié)構(gòu)進(jìn)行了跑車、剎車、跳車試驗(yàn),經(jīng)過數(shù)據(jù)分析,確定出該橋的實(shí)際沖擊系數(shù),同理論設(shè)計(jì)值進(jìn)行對(duì)比。根據(jù)實(shí)測(cè)值為管養(yǎng)部門提出建議。利用Midas/Civil建立廈漳跨海大橋的空間有限元模型,并進(jìn)行理論模態(tài)分析,得到該橋自振頻率和振型的理論值,將其與實(shí)測(cè)模態(tài)參數(shù)進(jìn)行比較分析研究。 通過對(duì)荷載試驗(yàn)結(jié)果的分析,對(duì)該橋工作狀況進(jìn)行評(píng)估,表明該橋工作狀態(tài)正常滿足設(shè)計(jì)要求。在對(duì)大跨度斜拉橋的靜動(dòng)力特性進(jìn)行總結(jié)歸納的基礎(chǔ)之上,結(jié)合廈漳大橋的荷載試驗(yàn)測(cè)試情況,對(duì)廈漳大橋荷載試驗(yàn)進(jìn)行了歸納總結(jié),提出改進(jìn)建議。通過試驗(yàn)積累了該橋的初始管理文件,為其他同類型大跨度斜拉橋的設(shè)計(jì)和荷載試驗(yàn)工作提供一些參考。
[Abstract]:Load test is a very practical science and technology, which involves the structure design and construction technology, has a strong comprehensive application, and complexity. The new structure load test is a scientific research test. With its advantages of cable-stayed bridge is used widely the modern cable-stayed bridge is becoming more and more large span. The Xiazhang bridge north branch cable-stayed bridge field test was studied based on load test of long-span cable-stayed bridge.
In this paper, the bridge static and dynamic load test methods are summarized, and the test plan and analysis of bridge structure finite element method is studied. Combined with the Xiazhang North Branch bridge, cable-stayed bridge, finite element modeling according to the characteristics of the bridge, using the finite element method of the bridge is calculated and analyzed theoretically the corresponding theoretical calculation data, design the testing scheme of the bridge static load test and dynamic load scheme, scheme of load test, static load test and deflection test point arrangement was studied.
In the premise of ensuring the load test results, and theoretical values are compared to the measured deformation condition of the control section, structure calculation of calibration coefficient, the structure of the actual bearing capacity was evaluated, to ensure that the structure can meet the requirements of the bearing capacity. At the same time the car brake on the bridge structure, jumping test, through the analysis of data sure, the actual impact coefficient of the bridge, with the theoretical design value are compared. According to the measured values for the proposed raising department. Tube by space finite element model of Midas/Civil established Xiazhang bridge, and the theory of modal analysis, the bridge vibration frequency and vibration model of the theoretical value, and the measured the modal parameters were investigated.
Through the analysis of the load test results, to evaluate the working condition of bridge, the bridge that normally meet the design requirements. Based on the summary in the static and dynamic characteristics of long-span cable-stayed bridge, load test of Xiazhang bridge of Xiazhang bridge, load test are summarized. Through the test, put forward the improvement proposal. The accumulation of initial management documents of the bridge, and provide some reference for the design and load test of other types of long-span cable-stayed bridges.

【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441;U448.27

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