本文關(guān)鍵詞： 抗震設(shè)計規(guī)范 設(shè)計地震動 延性設(shè)計 減、隔震設(shè)計 樁-土相互作用　出處：《蘭州交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：21世紀(jì)以來，隨著對強震記錄的觀測和抗震技術(shù)的不斷研究，橋梁抗震理論得到了很大的發(fā)展，世界各國的橋梁抗震設(shè)計規(guī)范也在不斷的更新和完善。由于各國的經(jīng)濟狀況、環(huán)境條件等因素的不同，各國的橋梁抗震規(guī)范都存在一定的差異，甚至可以說各自成為一個獨立的體系。然而，各國的抗震規(guī)范又是在不斷的吸收和借鑒其他國家先進(jìn)的設(shè)計思想而得到更新和完善。相對美國、歐洲、日本而言，我國的橋梁抗震規(guī)范還不夠成熟，尤其是橋梁延性和減、隔震設(shè)計方面，我國規(guī)范中對該部分內(nèi)容涉及的較少。本文分別對美國、歐洲、日本和中國的橋梁抗震規(guī)范進(jìn)行整體比較，對各國規(guī)范中涉及的一些參數(shù)進(jìn)行詳細(xì)分析，對我國規(guī)范中尚未涉及的內(nèi)容及參數(shù)取值考慮不足等方面給出一些建議，可對我國規(guī)范的修訂和完善提供參考。本文主要內(nèi)容如下： 1、介紹橋梁抗震設(shè)計的基本理論知識，包括橋梁受地震破壞的形式、影響因素、地震動輸入、橋梁破壞準(zhǔn)則、結(jié)構(gòu)地震振動方程、結(jié)構(gòu)動力特性及地震反應(yīng)分析方法等內(nèi)容，詳細(xì)論述了橋梁抗震設(shè)計的反應(yīng)譜分析法，簡要敘述了靜力法和時程分析法。 2、對四國規(guī)范的抗震設(shè)防目標(biāo)、設(shè)防標(biāo)準(zhǔn)、橋梁等級劃分進(jìn)行比較，分析了四國規(guī)范對抗震設(shè)防標(biāo)準(zhǔn)的差異。 3、對四國規(guī)范關(guān)于設(shè)計地震動中涉及的地震動區(qū)劃、場地類別劃分、反應(yīng)譜曲線圖及阻尼修正系數(shù)進(jìn)行比較分析，對我國所使用的“烈度”概念提出相關(guān)的建議，對各國阻尼比修正系數(shù)的取值進(jìn)行詳細(xì)的對比。 4、比較四國規(guī)范關(guān)于地震反應(yīng)分析方法、荷載組合、反應(yīng)譜法振型組合、地震作用組合、建模原則等規(guī)定的異同。 5、對四國規(guī)范中延性設(shè)計的內(nèi)容進(jìn)行比較，，針對我國規(guī)范規(guī)定的綜合影響系數(shù)與其他幾國規(guī)范采用的延性行為系數(shù)之間的差異，提出了相關(guān)的建議，并對各國塑性鉸長度和橋墩配筋率取值進(jìn)行總結(jié)。 6、對四國規(guī)范有關(guān)減、隔震設(shè)計適用條件、參數(shù)規(guī)定進(jìn)行比較，分析各國規(guī)范規(guī)定的隔振支座的等效剛度、等效阻尼比取值的變化規(guī)律。 7、通過有限元分析軟件對實橋工程進(jìn)行模擬，分析樁-土之間的相互作用對結(jié)構(gòu)模態(tài)和地震反應(yīng)值的影響。
[Abstract]:Since 21th century, with the observation of strong earthquake records and the continuous study of seismic technology, the seismic theory of bridges has been greatly developed. The codes for seismic design of bridges all over the world are constantly updated and perfected. Due to the differences of economic conditions and environmental conditions of different countries, there are some differences in the seismic codes of bridges in different countries. It can even be said that each has become an independent system. However, the seismic code of various countries is constantly absorbing and learning from the advanced design ideas of other countries to be updated and improved. Compared with the United States, Europe. In Japan, the seismic code of bridges in China is not mature enough, especially the ductility and mitigation of bridges, isolation design, the content of this part of the code is less. This paper respectively for the United States, Europe. The seismic code of bridges in Japan and China is compared as a whole, and some parameters involved in the codes are analyzed in detail. This paper gives some suggestions on the content and parameter values that have not yet been involved in the code of our country, which can provide a reference for the revision and perfection of our country's code. The main contents of this paper are as follows: 1. The basic theoretical knowledge of seismic design of bridges is introduced, including the form of earthquake damage, the influencing factors, the input of ground motion, the criterion of bridge failure, and the equation of seismic vibration of structures. In this paper, the dynamic characteristics of structures and seismic response analysis methods are discussed in detail, and the static method and time-history analysis method are briefly described. 2. Comparing the seismic fortification target, fortification standard and bridge grade of the code of four countries, and analyzing the difference of the code of the four countries to the standard of seismic fortification. 3. The division of ground motion, the classification of site, the curve of response spectrum and the coefficient of damping correction in the design of ground motion are compared and analyzed. This paper puts forward some suggestions on the concept of "intensity" used in our country, and makes a detailed comparison of the values of the revised coefficient of damping ratio in various countries. 4. Compare the differences and similarities between the four countries about seismic response analysis method, load combination, response spectrum mode combination, seismic action combination, modeling principle and so on. 5. Compare the content of ductility design in the four codes, and put forward some suggestions on the difference between the comprehensive influence coefficient and the ductile behavior coefficient adopted by other countries. The length of plastic hinge and the ratio of piers reinforcement are summarized. 6. Comparing the applicable conditions and parameters of the design of isolation and abatement of four countries, and analyzing the law of change of the equivalent stiffness and equivalent damping ratio of the vibration isolation bearings stipulated by the codes of other countries. 7. The influence of pile-soil interaction on structural mode and seismic response value is analyzed by finite element analysis software.
【學(xué)位授予單位】：蘭州交通大學(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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