【摘要】：在最近幾年,世界各地地震頻發(fā),尤其是中國,更是遭受了嚴(yán)重的汶川地震,給國家、人民造成了嚴(yán)重的生命、財(cái)產(chǎn)損失,橋梁作為道路的樞紐,是重要的生命線之一,道路的好壞、暢通是保證救援工作能否第一時(shí)間開展的重要因素,而先簡(jiǎn)支后連續(xù)梁橋在橋梁總數(shù)上占很大比重,所以研究該特定橋型抗震性能意義重大。然而我國對(duì)先簡(jiǎn)支后連續(xù)梁橋的抗震設(shè)計(jì)理論沒有針對(duì)性的規(guī)定,缺乏相應(yīng)的設(shè)計(jì)參考依據(jù),震害資料十分匱乏。本文主要以鸚鵡溝一號(hào)大橋?yàn)橐劳泄こ瘫尘?借助于大型有限元分析軟件,建立需求合理化模型,并對(duì)鸚鵡溝一號(hào)大橋的有限元模型進(jìn)行動(dòng)力特性分析,本文主要做了以下幾部分工作:1、通過閱讀大量橋梁抗震方面的資料,對(duì)確定性地震分析方法和非確定性分析方法等進(jìn)行系統(tǒng)的回顧和總結(jié)。2、結(jié)合工程材料對(duì)先簡(jiǎn)支后連續(xù)梁橋該特定橋型的動(dòng)力特性進(jìn)行研究,包括簡(jiǎn)支梁橋、先簡(jiǎn)支后連續(xù)梁橋和連續(xù)梁橋靜力效果和動(dòng)力特性之間的不同,以及找到哪些因素是影響橋梁結(jié)構(gòu)動(dòng)力特性的敏感性系數(shù)。3、對(duì)鸚鵡溝一號(hào)大橋進(jìn)行地震動(dòng)仿真模擬分析,得到了橋梁結(jié)構(gòu)在三種地震波加速度動(dòng)力響應(yīng)、速度動(dòng)力響應(yīng)、位移動(dòng)力響應(yīng)和內(nèi)力動(dòng)力響應(yīng),并進(jìn)行分析。4、對(duì)減隔震設(shè)計(jì)橋梁抗震性能進(jìn)行量化分析,把支座形式的選取作為研究重點(diǎn),通過選取不用的支座類型查看橋梁結(jié)構(gòu)在地震動(dòng)的動(dòng)力反應(yīng),并進(jìn)行對(duì)比分析。5、進(jìn)行非線性分析,定義材料模型的本構(gòu)關(guān)系,同時(shí)考慮樁土效應(yīng),通過纖維模型的分析方法對(duì)橋梁下部結(jié)構(gòu)進(jìn)行分析,并單獨(dú)進(jìn)行的自振特性分析;得到結(jié)構(gòu)自身材料的曲率-曲線、非彈性鉸狀態(tài)和動(dòng)力時(shí)程反應(yīng)的滯回曲線等。6、結(jié)合上述研究?jī)?nèi)容進(jìn)行分析匯總,得出預(yù)期的結(jié)論,同時(shí)進(jìn)行展望總結(jié)不足。通過對(duì)先簡(jiǎn)支后連續(xù)梁橋抗震性能的研究分析,得到一些意義重大的研究成果,為其設(shè)計(jì)理論的完善、有效抗震措施的提出和震后病害橋梁的加固具有較大的社會(huì)意義和工程應(yīng)用價(jià)值。
[Abstract]:In recent years, the frequent earthquakes around the world, especially in China, have suffered from the severe Wenchuan earthquake, causing serious loss of life and property to the country and the people, and bridges, as hubs of roads, are one of the important lifelines. Good or bad roads, smooth is an important factor to ensure the rescue work can be carried out in the first time, and the first simply supported continuous beam bridge in the total number of bridges account for a large proportion, so it is of great significance to study the seismic performance of the specific bridge type. However, the seismic design theory of simple support and continuous beam bridge in our country is not specific, and the corresponding design reference is lacking, and the seismic damage data is very scarce. In this paper, based on the engineering background of the No.1 Bridge in the parakou, with the aid of the large-scale finite element analysis software, the demand rationalization model is established, and the dynamic characteristics of the finite element model of the No.1 Bridge are analyzed. The main work of this paper is as follows: 1. Through reading a large number of bridge seismic data, the deterministic seismic analysis methods and non-deterministic analysis methods are systematically reviewed and summarized. Combined with engineering materials, the dynamic characteristics of this particular type of bridge are studied, including the difference between the static effect and dynamic characteristics of the simply supported beam bridge, the first supported continuous beam bridge and the continuous beam bridge. And find out which factors affect the dynamic characteristics of the bridge structure sensitivity coefficient. 3. Based on the simulation analysis of ground motion of the No.1 Bridge, the acceleration dynamic response of the bridge structure in three kinds of seismic waves is obtained. Displacement dynamic response and internal force dynamic response are analyzed. 4. The aseismic performance of the isolated bridge is analyzed quantitatively, and the selection of bearing form is regarded as the key point of the research. The dynamic response of bridge structure to ground motion is analyzed by selecting the type of support that is not needed. 5. The nonlinear analysis is carried out to define the constitutive relation of the material model, and the pile-soil effect is taken into account at the same time. The analysis method of fiber model is used to analyze the bridge understructure, and the natural vibration characteristic is analyzed separately. The curvature curve, the hysteretic curve of the inelastic hinge state and the dynamic time history response are obtained. Through the research and analysis of the seismic behavior of the bridge with simple support and continuous beam, some significant research results are obtained for the perfection of the design theory. It is of great social significance and engineering application value to put forward effective seismic measures and strengthen the damaged bridges after earthquake.
【學(xué)位授予單位】：河北工業(yè)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

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 陳奉民;張麗娟;;“先簡(jiǎn)支后連續(xù)”梁橋的設(shè)計(jì)及應(yīng)用[J];公路交通技術(shù);2006年01期

，

本文編號(hào)：2317408