本文選題：橋梁監(jiān)控 + 灰色理論　； 參考：《華北水利水電大學(xué)》2017年碩士論文

【摘要】：新世紀以來,隨著國家對交通基礎(chǔ)設(shè)施建設(shè)投入的逐步加大和橋梁施工技術(shù)的飛速發(fā)展,我國建設(shè)的高墩大跨橋梁高度、跨度不斷刷新橋梁建設(shè)記錄。連續(xù)剛構(gòu)橋不但繼承了連續(xù)梁橋曲線平緩,伸縮縫少,行車舒適的特點和T形剛構(gòu)體系橋梁整體性能好,結(jié)構(gòu)剛度大,變形小的優(yōu)點,而且可以減小跨中彎矩絕對值,從而降低主梁高度減少材料用量提高材料利用率。隨著橋梁結(jié)構(gòu)形式不斷向高墩大跨發(fā)展,薄壁高墩這種結(jié)構(gòu)形式脫穎而出,它相對于實心墩柔度增大而且容易受不平衡荷載及環(huán)境變化影響,對施工控制要求較高,施工控制日益成為設(shè)計和施工中的關(guān)鍵。本文以湖南高速黑垅大橋橋梁監(jiān)控項目為工程背景講行了研究。1、首先描述了大跨徑橋梁監(jiān)控技術(shù)的歷史和現(xiàn)狀,闡述了施工控制技術(shù)常見的理論方法和在工程中的實際應(yīng)用。2、文中采集的施工過程中結(jié)構(gòu)變形及主要控制斷面截面應(yīng)力等數(shù)據(jù),采用最小二乘法對模型仿真理論所取參數(shù)值調(diào)整,使設(shè)定的參數(shù)值更接近于實際并對理論算法進行了闡述。3、結(jié)合實際工程黑垅大橋項目,利用灰色系統(tǒng)理論進行下階段預(yù)測,以實測數(shù)據(jù)和理論模型為依據(jù),對該橋的線形進行控制,將理論值、實測值、預(yù)測值進行比較,結(jié)果表明效果較為理想。4、由于黑垅大橋具有曲線橋梁、薄壁高墩、大跨連續(xù)剛構(gòu)等特點,所以對溫度敏感性較高。溫度荷載對懸臂澆筑連續(xù)梁橋有很大影響,綜合溫度對橋墩及主梁的應(yīng)變及內(nèi)力影響選擇對橋梁因溫度產(chǎn)生次應(yīng)力相對較小的合理合龍溫度。最后本文為方便后續(xù)研究,對研究內(nèi)容進行了總結(jié)和展望。
[Abstract]:Since the new century, with the gradual increase of the country's investment in infrastructure construction and the rapid development of bridge construction technology, the high pier and span of the construction of our country constantly refresh the bridge construction records. The continuous rigid frame bridge not only inherits the slow curve of the continuous beam bridge, the expansion joint is few, the driving comfort characteristics and the T shape rigid frame system. The bridge has the advantages of good overall performance, large structural stiffness and small deformation, and can reduce the absolute value of the bending moment in the span, thus reducing the height of the main beam and reducing the material utilization. With the continuous development of the bridge structure to the high pier and large span, the structure form of the thin-walled high pier is outstanding, and its flexibility is increased and the capacity is larger than the solid pier. It is easy to be affected by unbalanced load and environmental change, which has higher requirements for construction control, and construction control is becoming the key in design and construction. This paper takes the monitoring project of Hunan high speed black ridge bridge as the background of the project, and describes the history and present situation of the long-span bridge monitoring technology, and expounds the construction control technology. The theoretical method and practical application in engineering,.2, the data of structural deformation and main section stress in the control section during the construction process, the parameter values of model simulation are adjusted by the least square method, the set parameters are closer to the reality and the theory algorithm is expounded.3, combined with the actual engineering black ridge. The bridge project, using the grey system theory to predict the next stage, based on the measured data and theoretical model, compares the line shape of the bridge, and compares the theoretical value, the measured value and the predicted value. The results show that the effect is more ideal.4, because the black ridge bridge has the characteristics of curved bridge, thin wall high pier and large span continuous rigid frame. The temperature load has a great influence on the cantilever casting continuous beam bridge. The influence of the temperature on the strain and the internal force of the bridge pier and the main beam and the internal force of the bridge is selected for the reasonable closing temperature which is relatively small for the secondary stress caused by the temperature. Finally, this paper makes a summary and Prospect of the research content.
【學(xué)位授予單位】：華北水利水電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U445.4

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