本文選題：超限運輸 + 荷載模型��； 參考：《南昌大學》2014年碩士論文

【摘要】：隨著我國城市化進程和現代化發(fā)展，再加上超載超限運輸經濟利益的驅動，超限車輛出現較為頻繁。超限車輛對橋梁的使用會造成很大的安全隱患，甚至有橋梁直接被重型貨車壓垮的事件發(fā)生,然而超限運輸是一個世界性難題,很難在短期內徹底解決，，因此，研究超限車輛荷載對橋梁的設計和維修具有重大意義。 本文根據杭州市留石快速路段車輛荷載的長期監(jiān)測數據，運用概率統(tǒng)計的基本理論和方法，首先對該路段的交通狀況進行了統(tǒng)計分析，得到該路段的交通組成及分布情況；然后利用MATLAB計算軟件編制相應程序，根據超限車輛判定標準篩選出超限車輛數據，并對超限車輛的總重、軸重、軸距等參數進行了統(tǒng)計分析，建立了超限車輛的荷載模型；最后通過MIDAS有限元分析軟件對實橋進行建模，分析超限車輛荷載對實橋產生的荷載效應和兩種狀態(tài)下的內力效應，并與現行城市橋梁荷載進行比較分析，得到超限車輛導致實橋荷載效應及內力效應的增大系數，據此對橋梁結構進行評估。 通過對監(jiān)測路段交通狀況的研究，證實了超限運輸難以避免的事實；根據計算分析超限車輛荷載對實橋產生的荷載效應和內力效應的增加值，得到了超限車輛荷載會對橋梁的使用和壽命造成不利影響的結論；通過對實橋結構進行評估，驗證了超限車輛對橋梁運營的影響；同時，本文建立的超限車輛荷載模型能為橋梁的設計和維修提供參考。
[Abstract]:With the development of urbanization and modernization in our country, and the drive of economic benefits of overload and overlimit transportation, the over-limit vehicles appear frequently. The use of overrun vehicles on bridges will cause great safety risks, and even some bridges will be crushed directly by heavy trucks. However, over-limit transportation is a worldwide problem, which is difficult to solve thoroughly in the short term, so, It is of great significance for the design and maintenance of bridges to study the overloading of vehicles. Based on the long-term monitoring data of vehicle load in the stone retaining expressway in Hangzhou, the traffic condition of the section is analyzed by using the basic theory and method of probability and statistics, and the traffic composition and distribution of the section are obtained. Then the corresponding program is compiled by MATLAB calculation software, and the data of overrun vehicle is screened according to the criterion of overrun vehicle, and the total weight, wheelbase and other parameters of the overrun vehicle are analyzed statistically, and the load model of the overrun vehicle is established. Finally, MIDAS finite element analysis software is used to model the real bridge, and the load effect caused by over-limit vehicle load on the real bridge and the internal force effect under two states are analyzed, and compared with the current urban bridge load. The increasing coefficients of load effect and internal force effect caused by over-limit vehicles are obtained, and then the bridge structure is evaluated. Through the study of the traffic condition of the monitoring section, the paper confirms the fact that it is difficult to avoid the over-limit transportation, and analyzes the added value of the load effect and the internal force effect of the over-limit vehicle load on the real bridge according to the calculation. It is concluded that the overrun vehicle load will have a negative impact on the use and life of the bridge. Through the evaluation of the actual bridge structure, the effect of the over-limit vehicle on the bridge operation is verified. At the same time, the influence of the overrun vehicle on the bridge operation is verified. The vehicle load model established in this paper can provide reference for bridge design and maintenance.
【學位授予單位】：南昌大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U441.2

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