【摘要】：近年來，全球地震頻繁發(fā)生，橋梁作為生命線工程，一旦在地震中發(fā)生破壞將會給人們的生命和財產(chǎn)安全造成巨大損失。長聯(lián)大跨連續(xù)梁橋是跨越大江大河時廣泛采用的主要橋型，所以對其抗震性能的研究分析就顯得尤為重要。論文在簡述地震反應分析的基本理論的基礎上，以內(nèi)蒙某黃河大橋為工程背景，研究了一聯(lián)十二跨連續(xù)梁橋（55+10×100+55）m的地震響應問題。運用有限元方法進行了長聯(lián)大跨連續(xù)梁橋模態(tài)分析、時程分析、減隔震分析。在進行地震反應分析時，考慮了樁土相互作用、行波效應等因素對結構內(nèi)力和位移反應的影響。論文主要研究內(nèi)容包括：詳細闡述了樁土相互作用、行波效應和減隔震技術的理論基礎，對其在Midas／Civil中的具體模擬做了詳細探討，建立完整的橋梁計算模型；分析了樁土相互作用對橋梁動力特性的影響；考慮豎向地震與水平地震組合輸入，進行橋梁的地震反應分析；選取地震安評報告的地震波對大橋進行時程響應分析；綜合對比非隔震時程響應分析與隔震時程響應分析的計算結果，得出一些初步結論。通過對內(nèi)蒙某大橋較為全面的地震反應分析，，得到的成果可以為今后長聯(lián)大跨連續(xù)梁橋的抗震設計提供參考。
[Abstract]:In recent years, global earthquakes occur frequently, bridges as lifeline engineering, once the earthquake damage will cause great loss of life and property safety. Long General Assembly span continuous beam bridge is the main bridge type which is widely used in crossing large rivers, so the study and analysis of its seismic performance is particularly important. Based on a brief introduction of the basic theory of seismic response analysis and taking a Yellow River Bridge in Inner Mongolia as an engineering background, the seismic response of a 12-span continuous beam bridge (55 10 脳 100 55) m is studied in this paper. The modal analysis, time history analysis and seismic isolation analysis of long span continuous beam bridge are carried out by finite element method. In seismic response analysis, the effects of pile-soil interaction and traveling wave effect on the internal force and displacement response of the structure are considered. The main contents of this paper are as follows: the theoretical basis of pile-soil interaction, traveling wave effect and seismic isolation technology are described in detail, and the concrete simulation in Midas/Civil is discussed in detail, and a complete bridge calculation model is established. The influence of pile-soil interaction on the dynamic characteristics of the bridge is analyzed, the seismic response of the bridge is analyzed by considering the combination of vertical earthquake and horizontal earthquake, and the seismic response of the bridge is analyzed by selecting the seismic wave of seismic safety assessment report. Some preliminary conclusions are obtained by synthetically comparing the calculation results of non-isolated time-history response analysis with that of isolated time-history response analysis. Through the comprehensive seismic response analysis of a bridge in Inner Mongolia, the results obtained can provide a reference for the seismic design of a long span continuous beam bridge in the future.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U442.55

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