本文選題：雙層高架連續(xù)梁橋 + 自振特性��； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：大規(guī)模的城鎮(zhèn)化建設(shè)和崎嶇的山區(qū)環(huán)境,使得某些地區(qū)橋梁建設(shè)用地日益緊張。雙層乃至多層高架橋能有效的解決橋梁建設(shè)用地不足的問題,故近些年來此種橋型的修建呈快速發(fā)展的趨勢。在服務(wù)國民經(jīng)濟(jì)的同時(shí),雙層連續(xù)梁橋不可避免的修建于地震區(qū),而現(xiàn)行抗震規(guī)范只是對單層橋梁的地震響應(yīng)簡化計(jì)算進(jìn)行了規(guī)定,尚無關(guān)于雙層連續(xù)梁橋的抗震計(jì)算規(guī)定,同時(shí)已有的雙層連續(xù)梁橋相關(guān)研究也較為少見。鑒于雙層連續(xù)梁橋在公路工程和市政工程中的“生命線”功能,有必要對其抗震性能進(jìn)行系統(tǒng)的研究。本文主要采用仿真模擬方法,擬對典型雙層連續(xù)梁橋的地震響應(yīng)規(guī)律及其減隔震控制方法進(jìn)行較系統(tǒng)全面的理論分析,包括橋墩強(qiáng)度和位移等抗震控制指標(biāo),以補(bǔ)充和完善現(xiàn)行橋梁抗震設(shè)計(jì)相關(guān)規(guī)范。本文的研究對于我國雙層或多層連續(xù)梁橋的抗震設(shè)計(jì),具有重要的理論意義、十分現(xiàn)實(shí)的工程背景和應(yīng)用價(jià)值。本文的主要研究內(nèi)容如下:首先對雙層連續(xù)梁橋的自振動(dòng)力特性進(jìn)行了分析,找尋不同支座布置形式對振型及頻率等影響,并進(jìn)行縱向及橫向反應(yīng)譜分析,總結(jié)地震作用下雙層連續(xù)梁橋的動(dòng)力響應(yīng)特點(diǎn)。然后介紹了梁橋地震激勵(lì)時(shí)程分析等相關(guān)結(jié)構(gòu)動(dòng)力學(xué)理論,包括橋梁墩柱纖維單元截面的劃分、雙層連續(xù)梁橋模型的建立。為進(jìn)一步發(fā)現(xiàn)其動(dòng)力響應(yīng)規(guī)律尤其是強(qiáng)震作用下的非線性行為,對雙層連續(xù)梁橋輸入人工生成地震波激勵(lì)并進(jìn)行時(shí)程分析,以研究其在罕遇地震下的動(dòng)力響應(yīng)特點(diǎn)及規(guī)律。最后研究了實(shí)際震害中可能發(fā)生的碰撞問題,與未考慮碰撞的響應(yīng)結(jié)果進(jìn)行對比,引入了幾種成熟、可靠的減隔震措施,并對減隔震效果進(jìn)行了對比,給出相應(yīng)建議。
[Abstract]:Large-scale urbanization and rugged mountain environment make some areas of bridge construction land increasingly tight. Double-layer or even multi-story viaduct can effectively solve the problem of insufficient land for bridge construction, so in recent years, the construction of this type of bridge shows a trend of rapid development. While serving the national economy, the double-deck continuous beam bridge is inevitably built in the earthquake area, but the current seismic code only provides for the simplified calculation of the seismic response of the single-layer bridge, but there is no seismic calculation regulation for the double-deck continuous beam bridge. At the same time, the existing double-deck continuous beam bridge related research is also relatively rare. In view of the "lifeline" function of double-deck continuous beam bridge in highway and municipal engineering, it is necessary to study its seismic performance systematically. In this paper, the seismic response law and seismic isolation control method of typical double-deck continuous beam bridge are analyzed systematically and comprehensively, including seismic control indexes such as pier strength and displacement. In order to supplement and improve the current seismic design of bridges related to the code. The research in this paper is of great theoretical significance and practical engineering background and application value for the seismic design of double-deck or multi-story continuous beam bridges in China. The main contents of this paper are as follows: firstly, the characteristics of self-vibration force of double-deck continuous beam bridge are analyzed, and the effects of different bearing arrangement on vibration mode and frequency are found, and the longitudinal and transverse response spectra are analyzed. The dynamic response characteristics of double-deck continuous beam bridge under earthquake action are summarized. Then the structural dynamics theory such as seismic excitation time history analysis of beam bridge is introduced, including the partition of fiber element section of bridge pier and column, and the establishment of two-layer continuous beam bridge model. In order to find out the dynamic response law, especially the nonlinear behavior under strong earthquake, the dynamic response characteristics and law of the double-deck continuous beam bridge under rare earthquake are studied by means of time-history analysis and the excitation of artificially generated seismic wave in the input of double-deck continuous beam bridge. Finally, the possible collision problems in the actual earthquake damage are studied, and compared with the response results without considering the impact, several mature and reliable isolation measures are introduced, and the results of the isolation are compared, and the corresponding suggestions are given.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U442.55

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