本文選題：時程分析 + 反應譜�。� 參考：《華東交通大學》2014年碩士論文

【摘要】：隨著全國基礎建設的完善和高速公路網的建立，高速公路上出現(xiàn)大量高墩橋梁，橋墩形式也多種多樣，主要包括雙柱式橋墩、空心薄壁墩、重力式橋墩，這些不同橋墩形式適用于不同高度，然而墩高為30米至35米的雙柱式橋墩由于其較好地正常使用承載力、施工方便、經濟性及穩(wěn)定性好而廣泛用于高速公路橋梁中。然而我國地域處于地震多發(fā)帶，橋梁作為生命線工程將接受地震的考驗；最近發(fā)生的地震給人們造成慘重的代價，部分橋梁出現(xiàn)落梁、整體倒塌及橋墩剪切等破壞現(xiàn)象，這讓人們不禁想起橋梁結構的抗震性能重要性。本文將基于《高速公路橋高墩結構形式分析研究》[1]文章研究基礎之上進行抗震分析，即對雙柱式高墩進行抗震研究。主要研究的內容包括有： (1)本文結合奉新至銅鼓高速公路段進行抗震分析，，以帶溪高架橋為研究對象，采用不同有限元分析方法對橋梁進行抗震分析，主要包括時程分析法、反應譜法及pushover法；并結合規(guī)范對計算結果進行驗算，得到雙柱式橋墩的抗震性能；以及對三種常見抗震分析法的計算結果進行對比。 (2)通過調整橋梁的約束探討不同支座對高墩橋梁抗震和穩(wěn)定性的影響。結果表明盆式支座對高墩橋梁有較好的減震和穩(wěn)定性效果。 (3)研究了橋墩剛度對橋梁的振動影響，主要探討了橋墩高度、截面形式、橋梁剛度分布不均對抗震的影響。
[Abstract]:With the improvement of national infrastructure and the establishment of highway network, there are a large number of high-pier bridges on the highway, and the types of piers are also varied, including two-column piers, hollow thin-walled piers, gravity piers, etc. These types of piers are suitable for different heights. However, the double-column piers, which are 30 to 35 meters in height, are widely used in highway bridges because of their good normal operation capacity, convenient construction, good economy and good stability. However, the region of our country is in the earthquake-prone zone, bridges as lifeline projects will be tested by earthquakes, the recent earthquakes have caused heavy costs to people, some bridges have fallen beams, collapsed as a whole, and bridge piers have been shearing, and so on. This reminds us of the importance of seismic performance of bridge structures. In this paper, the aseismic analysis is carried out on the basis of the study of the structural form of the high pier of expressway bridge, I. e., the aseismic analysis of the high pier with two columns. The main contents of the study include: Based on the seismic analysis of Fengxin-Tonggu Expressway, different finite element analysis methods are used to analyze the earthquake resistance of the bridge, including time-history analysis method, response spectrum method and pushover method. The seismic performance of double-column piers is obtained by checking the calculation results according to the code, and the calculation results of three kinds of common seismic analysis methods are compared. The influence of different supports on seismic resistance and stability of high pier bridges is discussed by adjusting the constraints of bridges. The results show that the basin bearing has better shock absorption and stability effect on the bridge with high piers. The influence of pier stiffness on bridge vibration is studied, and the influence of pier height, section form and uneven distribution of bridge stiffness on earthquake resistance is mainly discussed.
【學位授予單位】：華東交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U443.22;U442.55

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