【摘要】：隨著我國交通運輸工程事業(yè)的迅速發(fā)展，簡支變連續(xù)梁橋以其獨特具有的經(jīng)濟性、安全性和施工方便性在橋梁工程中得到普遍應(yīng)用。近些年來，地震多次發(fā)生，而橋梁作為重要的生命線工程之一，在抗震救災(zāi)中起到的作用不言而喻，因此，，對簡支變連續(xù)梁橋的抗震性能進行研究具有很大的現(xiàn)實意義。 我國現(xiàn)適用的橋梁工程抗震細則對多種類型橋梁的設(shè)計方法、抗震設(shè)防標準等有明確的說明，但對簡支變連續(xù)梁橋的抗震設(shè)計理論沒有針對性的規(guī)定，缺乏相應(yīng)的設(shè)計參考依據(jù)，且最近幾年來新建的簡支變連續(xù)梁橋，幾乎都沒有經(jīng)歷過強震的檢驗，所以其震害資料十分匱乏，沒有高烈度地震作用下的抗震使用經(jīng)驗。 本文以某五跨預(yù)應(yīng)力簡支變連續(xù)箱梁橋為研究背景，依據(jù)簡支變連續(xù)梁橋的研究現(xiàn)狀和地震響應(yīng)理論，建立結(jié)構(gòu)振動方程，借助有限元分析軟件ANSYS，對模型進行動力特性分析，進而利用彈性動態(tài)時程分析法研究簡支變連續(xù)梁橋的抗震性能，其次通過對變化橋梁跨數(shù)、跨徑、橋墩高度和剛度的簡支變連續(xù)梁橋模型研究，總結(jié)這些參數(shù)對此種橋型地震反應(yīng)的影響，根據(jù)分析結(jié)果，得出合理的簡支變連續(xù)梁橋結(jié)構(gòu)的抗震設(shè)計建議。 通過對簡支變連續(xù)梁橋抗震性能的研究，為其設(shè)計理論的完善、有效抗震措施的提出和震后病害橋梁的加固具有較大的社會意義和工程應(yīng)用價值。
[Abstract]:With the rapid development of transportation engineering in China, simply supported variable continuous beam bridges are widely used in bridge engineering with their unique economy, safety and construction convenience. In recent years, earthquakes have occurred many times, and bridge, as one of the important lifeline projects, plays a self-evident role in earthquake relief, so it is of great practical significance to study the seismic behavior of simply supported continuous beam bridge. The aseismic rules of bridge engineering in our country have a clear explanation on the design methods and seismic fortification standards of various types of bridges, but there are no specific provisions for the seismic design theory of simply supported variable continuous beam bridges. There is no corresponding reference for design, and in recent years, almost all of the newly built simply supported and continuous girder bridges have not been tested by strong earthquakes, so the seismic damage data are very scarce, and there is no seismic application experience under the action of high intensity earthquakes. Based on the research background of a five-span prestressed simply supported variable continuous box girder bridge and based on the research status and seismic response theory of the simply supported variable continuous beam bridge, the structural vibration equation is established in this paper, and the dynamic characteristics of the model are analyzed with the help of finite element analysis software ANSYS,. Then the seismic behavior of simply supported variable continuous beam bridge is studied by means of elastic dynamic time history analysis. Secondly, the model of simply supported variable continuous beam bridge with variable span, pier height and stiffness is studied. The influence of these parameters on the seismic response of this bridge type is summarized. According to the analysis results, reasonable seismic design suggestions for the structure of simply supported variable continuous beam bridge are obtained. Based on the study of seismic performance of simply supported variable continuous beam bridge, it is of great social significance and engineering application value to perfect the design theory, to put forward effective seismic measures and to strengthen the damaged bridge after earthquake.
【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】：2014
【分類號】：U442.55

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