曲线梁桥的地震反应分析与减隔震研究
发布时间：2018-07-28 15:30
【摘要】：曲线梁桥能够很好的适应路线线形,在城市高架,立体交通中较为常见。小曲率半径曲线梁桥的应用越来越广泛,但是曲线梁桥地震响应比较复杂,设计中存在着一系列问题,如桩土作用的影响,地震波最不利激励方向的确定,减隔震的设计等等。本文以三跨30m+30m+30m的预应力混凝土连续曲线梁桥为工程实例背景,通过有限元程序Midas/civil建立模型进行深入分析,主要内容如下:(1)调查分析曲线梁桥在近些年来地震灾害中发生破坏的特点;调查国内外曲线梁桥的研究现状,对各国规范中关于曲线梁桥的抗震设计规定进行对比分析。(2)采用Midas/civil软件对曲线梁桥进行建模及建模时考虑了支座预偏心的布置,了解曲线梁桥的动力特性,分析曲率半径对自振特性的影响及曲线梁桥地震响应的特点;研究对于模型是否考虑桩-土作用进行对比研究。(3)根据08抗震细则,采用时程分析法对曲线梁桥进行减隔震研究。确定曲线梁桥最不利地震动输入方向。(4)根据确定的最不利地震动方向,对曲线梁桥进行减隔震设计。分析采用铅芯橡胶支座进行曲线梁桥的减震性能,研究曲线梁桥的减震性能提高程度。对铅芯橡胶支座减震参数(如支座刚度,支座屈服力)进行分析。(5)介绍了常用的桥梁纵向防落梁装置和横向抗震挡块。分析了地震中横向抗震挡块的影响及抗震挡块和铅芯橡胶支座共同考虑时的地震响应。
[Abstract]:Curved girder bridge can adapt to the line shape well, it is more common in urban elevated, three-dimensional traffic. The application of curved beam bridge with small curvature radius is more and more extensive, but the seismic response of curved beam bridge is more complex, there are a series of problems in the design, such as the effect of pile and soil, the determination of the most unfavorable excitation direction of seismic wave, the design of seismic isolation and so on. This paper takes the prestressed concrete continuous curved girder bridge with three spans 30m 30m as the engineering example, and establishes the model through the finite element program Midas/civil to carry on the thorough analysis. The main contents are as follows: (1) investigation and analysis of the damage characteristics of curved girder bridges in recent years, investigation of the current research situation of curved girder bridges at home and abroad, The aseismic design regulations of curved girder bridges in various countries are compared and analyzed. (2) the dynamic characteristics of curved girder bridges are understood by taking into account the pre-eccentricity arrangement of supports when modeling and modeling the curved girder bridges by using Midas/civil software. The influence of radius of curvature on the natural vibration characteristics and the characteristics of seismic response of curved beam bridges are analyzed, and a comparative study on whether the pile-soil interaction is considered in the model is studied. (3) according to the earthquake resistance rules of 08, the seismic isolation of curved girder bridges is studied by time-history analysis method. The input direction of the most unfavorable ground motion of curved girder bridge is determined. (4) according to the direction of the most unfavorable ground motion determined, the seismic isolation design of curved girder bridge is carried out. The vibration absorption performance of curved beam bridge with lead rubber bearing is analyzed, and the improvement degree of vibration absorption performance of curved beam bridge is studied. The vibration absorption parameters (such as bearing stiffness and bearing yield force) of lead rubber bearing are analyzed. (5) the common longitudinal anti-falling beam device and transverse seismic block of bridge are introduced. The influence of transverse seismic block and the seismic response of seismic block and lead rubber bearing are analyzed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55
本文编号：2150716
[Abstract]:Curved girder bridge can adapt to the line shape well, it is more common in urban elevated, three-dimensional traffic. The application of curved beam bridge with small curvature radius is more and more extensive, but the seismic response of curved beam bridge is more complex, there are a series of problems in the design, such as the effect of pile and soil, the determination of the most unfavorable excitation direction of seismic wave, the design of seismic isolation and so on. This paper takes the prestressed concrete continuous curved girder bridge with three spans 30m 30m as the engineering example, and establishes the model through the finite element program Midas/civil to carry on the thorough analysis. The main contents are as follows: (1) investigation and analysis of the damage characteristics of curved girder bridges in recent years, investigation of the current research situation of curved girder bridges at home and abroad, The aseismic design regulations of curved girder bridges in various countries are compared and analyzed. (2) the dynamic characteristics of curved girder bridges are understood by taking into account the pre-eccentricity arrangement of supports when modeling and modeling the curved girder bridges by using Midas/civil software. The influence of radius of curvature on the natural vibration characteristics and the characteristics of seismic response of curved beam bridges are analyzed, and a comparative study on whether the pile-soil interaction is considered in the model is studied. (3) according to the earthquake resistance rules of 08, the seismic isolation of curved girder bridges is studied by time-history analysis method. The input direction of the most unfavorable ground motion of curved girder bridge is determined. (4) according to the direction of the most unfavorable ground motion determined, the seismic isolation design of curved girder bridge is carried out. The vibration absorption performance of curved beam bridge with lead rubber bearing is analyzed, and the improvement degree of vibration absorption performance of curved beam bridge is studied. The vibration absorption parameters (such as bearing stiffness and bearing yield force) of lead rubber bearing are analyzed. (5) the common longitudinal anti-falling beam device and transverse seismic block of bridge are introduced. The influence of transverse seismic block and the seismic response of seismic block and lead rubber bearing are analyzed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55
【参考文献】
相关期刊论文 前1条
1 张吉;;新型曲线梁桥横向抗震支座应用研究[J];公路交通科技(应用技术版);2007年10期
相关博士学位论文 前1条
1 杨风利;铁路桥梁减隔震设计方法及设计参数研究[D];北京交通大学;2007年
相关硕士学位论文 前1条
1 唐峰;新型形状记忆合金橡胶隔震支座的研究[D];广州大学;2006年
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