长联大跨连续梁桥地震响应分析及减隔震技术研究
发布时间：2018-12-14 03:33
【摘要】：近年来，全球地震频繁发生，桥梁作为生命线工程，一旦在地震中发生破坏将会给人们的生命和财产安全造成巨大损失。长联大跨连续梁桥是跨越大江大河时广泛采用的主要桥型，所以对其抗震性能的研究分析就显得尤为重要。论文在简述地震反应分析的基本理论的基础上，以内蒙某黄河大桥为工程背景，研究了一联十二跨连续梁桥（55+10×100+55）m的地震响应问题。运用有限元方法进行了长联大跨连续梁桥模态分析、时程分析、减隔震分析。在进行地震反应分析时，考虑了桩土相互作用、行波效应等因素对结构内力和位移反应的影响。论文主要研究内容包括：详细阐述了桩土相互作用、行波效应和减隔震技术的理论基础，对其在Midas／Civil中的具体模拟做了详细探讨，建立完整的桥梁计算模型；分析了桩土相互作用对桥梁动力特性的影响；考虑竖向地震与水平地震组合输入，进行桥梁的地震反应分析；选取地震安评报告的地震波对大桥进行时程响应分析；综合对比非隔震时程响应分析与隔震时程响应分析的计算结果，得出一些初步结论。通过对内蒙某大桥较为全面的地震反应分析，，得到的成果可以为今后长联大跨连续梁桥的抗震设计提供参考。
[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.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55
本文编号：2377836
[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.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55
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