【摘要】：眾所周知，橋梁是公路交通網(wǎng)絡(luò)的重要組成部分，是公路系統(tǒng)的咽喉和樞紐。橋梁無論跨度大小，只要在地震中發(fā)生嚴(yán)重的損毀，都有可能導(dǎo)致交通網(wǎng)絡(luò)的癱瘓，從而嚴(yán)重影響災(zāi)后抗震救災(zāi)工作。連續(xù)剛構(gòu)橋具有跨度大、受力合理、適應(yīng)性強(qiáng)等優(yōu)點(diǎn)，已經(jīng)成為深溝險(xiǎn)壑、地形復(fù)雜山區(qū)的首選橋型，作為生命線工程在抗震救災(zāi)中扮演著重要的角色。但是該類橋梁的跨度下，橋墩較高且差異較大，，其動力特性也較為復(fù)雜，地震響應(yīng)與常見的中小跨徑橋梁的地震響應(yīng)有所不同。樁土效應(yīng)、橋墩的截面形式和類型、減隔震支座的應(yīng)用等都會對此類橋梁的抗震性能產(chǎn)生不同程度的影響。本文利用大型有限元軟件Midas Cvil，主要研究了樁土效應(yīng)、橋墩參數(shù)以及減隔震支座的應(yīng)用對大跨度連續(xù)剛構(gòu)橋抗震性能的影響。 （1）簡要的總結(jié)了目前橋梁工程界所采用的抗震分析理論和抗震設(shè)計(jì)的基本思想。 （2）建立連續(xù)剛構(gòu)橋的動力計(jì)算模型，進(jìn)行連續(xù)剛構(gòu)橋的地震響應(yīng)特性分析�？偨Y(jié)歸納了大跨度連續(xù)剛構(gòu)橋的地震響應(yīng)特點(diǎn)。 （3）研究了樁土相互作用對大跨度連續(xù)剛構(gòu)橋在地震作用下反應(yīng)的影響，橋梁在進(jìn)行抗震設(shè)計(jì)時要根據(jù)實(shí)際地質(zhì)情況考慮樁土相互作用，橋梁選址盡量選擇堅(jiān)硬場地。 （4）研究了連續(xù)剛構(gòu)橋的主墩結(jié)構(gòu)形式對橋梁抗震性能的影響，提出了一些大跨度連續(xù)剛構(gòu)橋基于橋墩選型的概念設(shè)計(jì)原則。 （5）分析了橋梁在使用了鉛芯橡膠支座后的減隔震效果，為大跨連續(xù)剛構(gòu)橋的減隔震設(shè)計(jì)提供參考借鑒。
[Abstract]:As we all know, bridge is an important part of highway traffic network and the throat and hub of highway system. No matter the span of the bridge, as long as serious damage occurs in the earthquake, it may lead to the paralysis of the traffic network, thus seriously affecting the disaster relief work. Continuous rigid frame bridge has the advantages of large span, reasonable force and strong adaptability. It has become the first choice of bridge type in deep gully and mountainous area, and plays an important role in earthquake disaster relief as a lifeline project. But under the span of this kind of bridge, the pier is relatively high and the difference is big, its dynamic characteristic is also more complex, the seismic response is different from the common medium and small span bridge seismic response. The pile-soil effect, the form and type of piers, and the application of isolation bearings have different effects on the seismic performance of this kind of bridges. In this paper, the effects of pile-soil effect, pier parameters and isolation bearing on the seismic behavior of long-span continuous rigid frame bridge are studied by using the finite element software Midas Cvil,. The main contents are as follows: (1) the theory of seismic analysis and the basic idea of seismic design are briefly summarized in the field of bridge engineering. (2) the dynamic calculation model of continuous rigid frame bridge is established, and the seismic response characteristic of continuous rigid frame bridge is analyzed. The seismic response characteristics of long span continuous rigid frame bridge are summarized. (3) the effect of pile-soil interaction on the seismic response of long-span continuous rigid frame bridge is studied. In seismic design, the pile-soil interaction should be considered according to the actual geological conditions, and the hard site should be chosen as far as possible. (4) the influence of the structure form of main pier of continuous rigid frame bridge on the seismic performance of the bridge is studied, and some conceptual design principles of long-span continuous rigid frame bridge based on pier selection are put forward. (5) the seismic isolation effect of the bridge with lead-rubber bearing is analyzed, which provides a reference for the design of the long-span continuous rigid frame bridge.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U442.55;U448.23

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