【摘要】：近年來,隨著我國社會經(jīng)濟(jì)的發(fā)展,城市化進(jìn)程不斷加快,各種高架快速交通網(wǎng)絡(luò)的建設(shè)也在不斷增加。橋梁作為城市的生命線工程,如果在地震中遭到嚴(yán)重破壞,將造成震后救災(zāi)工作的巨大困難,導(dǎo)致巨大的經(jīng)濟(jì)損失。現(xiàn)有城市高架橋由于時間的推移,抗震性能降低,且新城市橋梁規(guī)范頒布,對城市高架橋的抗震性能提出了新要求。有必要對這些橋梁進(jìn)行抗震性能評估,并采取適當(dāng)?shù)目拐鸺庸檀胧１疚耐ㄟ^對福州城市混凝土高架橋進(jìn)行調(diào)查,應(yīng)用經(jīng)驗(yàn)統(tǒng)計(jì)法對橋梁進(jìn)行震害預(yù)測。然后在基于調(diào)查的基礎(chǔ)上,對橋梁的容易損傷構(gòu)件和橋梁整體進(jìn)行順橋向和橫橋向地震激勵下的理論易損性分析。主要內(nèi)容包括：(1)總結(jié)了橋梁的震害特點(diǎn)以及橋梁結(jié)構(gòu)地震易損性發(fā)展研究概況,探討了地震波輸入問題和損傷指標(biāo)的確定,為后面橋梁損傷指標(biāo)確定和易損性曲線建立提供理論依據(jù)。(2)對福州市主干道和快速路上的城市混凝土高架橋進(jìn)行調(diào)查,統(tǒng)計(jì)相關(guān)信息,運(yùn)用經(jīng)驗(yàn)統(tǒng)計(jì)法進(jìn)行震害預(yù)測。(3)詳細(xì)介紹混凝土高架橋動力模型的建立要點(diǎn)和基準(zhǔn)橋的順橋向地震易損性曲線的建立,并對《城市橋梁抗震設(shè)計(jì)規(guī)范(CJJ166-2011)》和《公路橋梁抗震設(shè)計(jì)細(xì)則(JTG/TB02—01-2008)》進(jìn)行對比和橋梁在不同規(guī)范下易損性的對比。(4)對城市混凝土連續(xù)箱梁高架橋進(jìn)行順橋向地震易損性分析,探討墩高、跨徑和坡度等參數(shù)變化下對板式橡膠支座、盆式滑動支座、盆式固定支座和固定墩等橋梁最不利構(gòu)件的易損性影響,以及對支座整體和全橋易損性的影響。(5)對基準(zhǔn)橋的各構(gòu)件進(jìn)行順橋向和橫橋向易損性曲線對比,并探討城市混凝土連續(xù)箱梁高架橋橫橋向地震下,墩高、跨徑和坡度等參數(shù)變化下對板式橡膠支座、盆式滑動支座、盆式固定支座和固定墩等橋梁最不利構(gòu)件的易損性影響,以及對全橋整體易損性的影響。通過以上的對比分析,得出相應(yīng)的規(guī)律和結(jié)論,可以為橋梁的抗震加固提供一定依據(jù)。
[Abstract]:In recent years, with the development of China's social economy, the process of urbanization is accelerating, and the construction of various elevated express transportation networks is also increasing. As the lifeline engineering of the city, if the bridge is seriously damaged in the earthquake, it will cause great difficulties in the disaster relief work after the earthquake, resulting in huge economic losses. Due to the passage of time, the seismic performance of the existing urban viaducts is reduced, and the new urban bridge code is issued, which puts forward new requirements for the seismic performance of urban viaducts. It is necessary to evaluate the seismic performance of these bridges and take appropriate seismic reinforcement measures. Based on the investigation of Fuzhou City concrete viaduct, the earthquake damage of the bridge is predicted by means of empirical statistics. Then, based on the investigation, the theoretical vulnerability analysis of the bridge components and the whole bridge subjected to the seismic excitation in the direction of the bridge and the transverse direction is carried out. The main contents are as follows: (1) the characteristics of earthquake damage of bridges and the development of seismic vulnerability of bridge structures are summarized, and the problem of seismic wave input and the determination of damage index are discussed. It provides a theoretical basis for the determination of damage index and the establishment of vulnerability curve. (2) the investigation of urban concrete viaducts on main roads and expressways in Fuzhou is carried out, and the relevant information is counted. The main points of establishing dynamic model of concrete viaduct and the establishment of seismic vulnerability curve in forward direction of reference bridge are introduced in detail by means of empirical statistical method. (3) the main points of establishing dynamic model of concrete viaduct are introduced in detail. The comparison between the Code for Seismic Design of Urban Bridges (CJJ166-2011) and the rules for Seismic Design of Highway Bridges (JTG/TB02-01-2008) and the comparison of the vulnerability of bridges under different specifications are made. (4) the seismic vulnerability of urban concrete continuous box girder viaducts is analyzed. The effects of pier height, span and slope on the vulnerability of the most unfavorable components of bridges, such as plate rubber bearings, basin sliding supports, basin fixed supports and fixed piers, are discussed. And the influence on the vulnerability of the whole and the whole bridge. (5) comparing the vertical and transverse viaduct vulnerability curves of each component of the reference bridge, and discussing the pier height under the transverse earthquake of the city concrete continuous box girder viaduct bridge. The influence of span and slope on the vulnerability of the most unfavorable components of the bridge, such as the plate rubber bearing, the basin sliding support, the basin fixed support and the fixed pier, as well as the overall vulnerability of the whole bridge. Through the comparison and analysis above, the corresponding laws and conclusions can be obtained, which can provide some basis for the seismic reinforcement of the bridge.
【學(xué)位授予單位】：福州大學(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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