【作者】 张伟；

【导师】 阎贵平； 张晓林；

【作者基本信息】 北京交通大学 ， 桥梁与隧道工程， 2007， 硕士

【摘要】 本文在总结国内外桥梁抗震研究结果的基础上，结合北京奥林匹克森林公园内，跨北辰西路的斜腿刚构桥梁为工程实例，基于有限元的原理，采用Midas程序建立了本桥的动力计算模型，研究了桩土相互作用对桥梁自振特性的影响，并将其与简单体系拱的自振特性进行对比，分析总结了规律。在模态分析的基础上，对本桥进行了地震作用下的反应谱分析以及时程分析，探索了桩土相互作用，行波效应，竖向地震动对该类桥梁地震反应的影响。指出了该类桥梁在抗震设计中应注意的事项。分析了抗震设计中的薄弱截面，给出该截面的内力时程，并总结了响应规律。将谱分析和动力时程的结果加以分析、比较，得到本桥的地震响应结果并进行强度分析。结论可作为本桥抗震设计的依据，同时也为今后类似桥梁地震响应分析提供了有意义的参考。更多还原

【Abstract】 On the foundation of summaries of domestic and foreign seismic researches, a dynamic model of slant-leg rigid-frame bridge, which is across Beichen West Road in Beijing Olympic forest park, is built by Midas based on the principle of finite element in this paper. The effects of pile-soil interaction on dynamic characteristics of bridge are analyzed. The natural vibration characteristics of slant-leg rigid-frame bridge are compared with those of simple arched bridge. And the laws are summarized.Based on the modal calculated results, this bridge is analyzed by the method of response spectrum and time-history. The influences of pile-soil interaction, passing-wave effect and vertical shake of ground on bridge seismic response are studied. The issues that should be paid more attention to in the seismic design are also proposed.The weak sections are analyzed in the seismic design. The time-history curves of internal force and response laws are summarized. The seismic response results of bridge are analyzed by comparing the spectrum and time-history response, and analyses of section’s intension are also taken into consideration. The conclusions can be a suggestion of seismic design for this bridge, as well as a reference for other similar designs in the future.更多还原