發(fā)布時(shí)間：2018-02-28 20:14

  本文關(guān)鍵詞： 動(dòng)水壓力 Morison方程 簡(jiǎn)化輻射波浪法 混合法 地震波合成 地震響應(yīng)　出處：《西南交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國(guó)基礎(chǔ)建設(shè)新時(shí)代的到來(lái),交通建設(shè)將會(huì)面臨特殊地形條件,特別是橋梁所占的比例很大,不可避免將會(huì)遇到跨江,跨海以及跨水庫(kù)的橋梁,這些地區(qū)建設(shè)橋梁將會(huì)面臨一個(gè)共同的特點(diǎn),深水墩橋梁的建設(shè)。而橋梁在運(yùn)營(yíng)階段必需考慮偶然荷載地震作用對(duì)橋梁的的影響,地震對(duì)深水橋梁作用時(shí),橋墩會(huì)發(fā)生剛體運(yùn)動(dòng)和彈性振動(dòng),從而影響橋墩周圍水體的運(yùn)動(dòng),水體的運(yùn)動(dòng)又會(huì)以動(dòng)水壓力的形式反作用于橋墩,兩者相互影響,就是復(fù)雜的墩水耦合問(wèn)題。正是由于墩水耦合的影響,會(huì)產(chǎn)生不同于在空氣中橋梁的動(dòng)力特性和地震響應(yīng),可能會(huì)對(duì)橋梁結(jié)構(gòu)產(chǎn)生不利的影響,因此研究動(dòng)水壓力的簡(jiǎn)化方法及其對(duì)橋梁的響應(yīng)是本文的重點(diǎn)。本文以某大跨度公鐵兩用斜拉橋?yàn)楣こ虒?shí)例,對(duì)其進(jìn)行動(dòng)水壓力分析。具體包括以下幾個(gè)方面：(1)通過(guò)大量的文獻(xiàn)資料介紹了地震及其橋梁結(jié)構(gòu)的震害特點(diǎn),進(jìn)而說(shuō)明深水墩橋梁的抗震及其國(guó)內(nèi)外研究現(xiàn)狀。(2)闡述了動(dòng)水壓力在工程中常用的計(jì)算方法及其基本理論,包含Morison方程、輻射波浪法和流體單元法。(3)詳細(xì)的介紹了能夠同時(shí)考慮矩形空心墩外域水和內(nèi)域水的動(dòng)水壓力的計(jì)算方法：基于歐洲橋梁抗震規(guī)范同時(shí)考慮內(nèi)外域水體的擴(kuò)展Morison方程；基于輻射波浪法的簡(jiǎn)化公式；基于輻射波浪法和流體單元法的混合法。結(jié)合某大跨度公鐵兩用斜拉橋的矩形空心墩討論其內(nèi)外域水動(dòng)水壓力附加質(zhì)量相對(duì)于墩身的分布特點(diǎn),并進(jìn)行了方法間的對(duì)比。(4)分析了動(dòng)水壓力對(duì)橋梁結(jié)構(gòu)動(dòng)力特性的影響。(5)考慮地震動(dòng)空間效應(yīng)(場(chǎng)地效應(yīng)、行波效應(yīng)、相干效應(yīng))的地震波的合成,對(duì)深水墩大跨斜拉橋進(jìn)行一致激勵(lì)和考慮空間效應(yīng)多點(diǎn)激勵(lì)的地震響應(yīng)分析,并用動(dòng)水壓力影響系數(shù)判斷地震動(dòng)水壓力對(duì)橋梁的影響大小。
[Abstract]:With the arrival of a new era of infrastructure construction in China, traffic construction will face special terrain conditions, especially the large proportion of bridges, which will inevitably meet bridges across rivers, seas and reservoirs. The bridge construction in these areas will be faced with a common characteristic, the construction of deep water pier bridge, and the bridge must consider the influence of accidental load and earthquake on the bridge in the operation stage, when the earthquake acts on the deep water bridge, Rigid body motion and elastic vibration will occur on the pier, which will affect the movement of the water body around the pier, and the movement of the water body will react to the pier in the form of dynamic water pressure. It is precisely because of the influence of pier-water coupling that the dynamic characteristics and seismic responses of bridges in the air will be different from those of bridges in the air, which may have a negative impact on the bridge structure. Therefore, the emphasis of this paper is to study the simplified method of hydrodynamic pressure and its response to bridges. The characteristics of earthquake and its bridge structure are introduced through a large amount of literature data, including the following aspects: 1. Furthermore, the paper explains the aseismic behavior of deep water pier bridge and its research status at home and abroad. (2) the calculation method and basic theory of dynamic water pressure in engineering, including Morison equation, are expounded. Radiation wave method and fluid element method. (3) the calculation method of dynamic water pressure which can simultaneously consider the external and inner water of rectangular hollow pier is introduced in detail. Based on the seismic code of European bridges, the extended Morison equation of inner and outer water body is considered simultaneously. Based on the simplified formula of radiation wave method, the hybrid method based on radiation wave method and fluid element method, the distribution characteristics of hydrodynamic hydrodynamic pressure and additional mass relative to the pier are discussed in combination with the rectangular hollow piers of a large-span double-purpose cable-stayed bridge. The influence of hydrodynamic pressure on the dynamic characteristics of bridge structure is analyzed. (5) the seismic wave synthesis considering the spatial effect of ground motion (site effect, traveling wave effect, coherent effect) is analyzed. The seismic response analysis of long-span cable-stayed bridge with deep water piers under uniform excitation and multi-point excitation considering spatial effect is carried out. The influence coefficient of dynamic water pressure is used to judge the influence of ground motion water pressure on bridge.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U442.55;U448.27

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 賴偉;鄭鐵華;雷勇;;Morison方程中動(dòng)水阻力項(xiàng)對(duì)橋梁樁柱地震反應(yīng)的影響[J];四川建筑科學(xué)研究;2007年04期

2 許謀奎;張猛;張?jiān)鲕?;多點(diǎn)地震動(dòng)合成簡(jiǎn)化方法研究[J];地震工程與工程振動(dòng);2009年01期

3 屈鐵軍，，王前信;空間相關(guān)的多點(diǎn)地震動(dòng)合成(Ⅱ)──合成實(shí)例[J];地震工程與工程振動(dòng);1998年02期

4 劉先明,葉繼紅,李愛群;空間相關(guān)多點(diǎn)地震動(dòng)合成的簡(jiǎn)化方法[J];工程抗震;2003年01期

5 房營(yíng)光;土—樁—平臺(tái)—水流系統(tǒng)的地震反應(yīng)分析[J];廣東工學(xué)院學(xué)報(bào);1994年04期

6 孫利民;李鳳琴;張鵬;;彈體水中自振特性的有限元分析[J];淮陰工學(xué)院學(xué)報(bào);2008年03期

7 房營(yíng)光,孫鈞;平臺(tái)-群樁-水流-土體系統(tǒng)的地震反應(yīng)分析[J];土木工程學(xué)報(bào);1998年05期

8 黃信;李忠獻(xiàn);;動(dòng)水壓力作用下深水橋墩非線性地震響應(yīng)分析[J];震災(zāi)防御技術(shù);2010年03期

相關(guān)博士學(xué)位論文 前1條

1 楊萬(wàn)理;深水橋梁動(dòng)水壓力分析方法研究[D];西南交通大學(xué);2012年

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