波纹钢腹板连续刚构桥地震响应及减震措施研究

发布时间：2018-04-26 21:35

本文选题：波纹钢腹板连续刚构桥 + 桥墩高度　；参考：《西南交通大学》2017年硕士论文

【摘要】：波纹钢腹板连续刚构桥与混凝土腹板连续刚构桥相比,在构造、受力性能及经济效益等方面具有较大的优势。国内外对波纹钢腹板连续刚构桥的研究主要集中在在静力方面,对其动力性能的研究相对较少。随着波纹钢腹板连续刚构桥的逐步应用,对其开展地震响应及减震措施的研究意义重大。本文以某波纹钢腹板连续刚构桥为工程背景,建立全桥有限元分析模型,采用反应谱法和时程分析法对其进行了地震响应及减震措施的研究。主要内容如下:(1)归纳总结了波纹钢腹板组合箱梁桥的特点及地震响应分析的研究现状,并介绍了桥梁地震反应分析时常用的静力法、反应谱法及时程分析法。(2)依据某实际工程,采用Midas Civil建立全桥有限元分析模型,采用反应谱法,研究了桥墩高度对波纹钢腹板连续刚构桥动力特性及E1地震动作用下的主梁位移及内力、桥墩位移及内力的影响。(3)利用上面建立的全桥有限元分析模型,采用时程分析法,研究了非岩石地基土比例系数m(20000kN/m~4、40000kN/m~4、60000kN/m~4、80000kN/m~4、100000kN/m~4)对波纹钢腹板连续刚构桥动力特性及E2地震动作用下的主梁位移及内力、桥墩位移及内力的影响。(4)依据该波纹钢腹板连续刚构桥的实际地质情况,建立考虑桩土效应的m法模型和不考虑桩土效应的直接嵌固模型,采用时程分析法,探讨了不考虑桩土效应对波纹钢腹板连续刚构桥动力特性及E2地震动作用下的主梁位移及内力、桥墩位移及内力的影响。(5)按照桥梁减隔震原理,利用第三章建立的全桥有限元分析模型,研究粘滞阻尼器的阻尼系数、速度指数及阻尼器刚度对桥梁减震效果的影响,得到了粘滞阻尼器的合理阻尼器参数。
[Abstract]:Compared with concrete web continuous rigid frame bridge, corrugated steel web continuous rigid frame bridge has great advantages in construction, mechanical performance and economic benefit. The research of corrugated steel web continuous rigid frame bridge at home and abroad is mainly focused on static force, but the research on its dynamic performance is relatively few. With the gradual application of corrugated steel web continuous rigid frame bridge, it is of great significance to study its seismic response and seismic absorption measures. Based on the engineering background of a corrugated steel web continuous rigid frame bridge, the finite element analysis model of the whole bridge is established in this paper. The seismic response and damping measures are studied by using the response spectrum method and time history analysis method. The main contents are as follows: (1) the characteristics of corrugated steel web composite box girder bridge and the research status of seismic response analysis are summarized, and the static method commonly used in bridge seismic response analysis is introduced. The finite element analysis model of the whole bridge is established by Midas Civil. The dynamic characteristics of the bridge pier height to corrugated steel web continuous rigid frame bridge and the displacement and internal force of the main beam under the action of E1 ground motion are studied by using the response spectrum method. The influence of pier displacement and internal force. (3) using the finite element analysis model established above, the time history analysis method is used. The dynamic characteristics of continuous rigid frame bridge with corrugated steel webs and the displacement and internal force of main beam under E2 ground motion are studied. According to the actual geological conditions of the corrugated steel web continuous rigid frame bridge, the m method model considering the pile-soil effect and the direct solid model without considering the pile-soil effect are established, and the time history analysis method is adopted. The dynamic characteristics of continuous rigid frame bridge with corrugated steel webs and the effects of displacement and internal force of main beam, pier displacement and internal force under the action of E _ 2 ground motion without considering the pile-soil effect are discussed. The influence of damping coefficient, velocity exponent and damper stiffness on the damping effect of the viscous damper is studied by using the full bridge finite element analysis model established in chapter 3. The reasonable damper parameters of the viscous damper are obtained.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.55;U448.23

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