公路桥梁减震伸缩装置研究

【作者】 王统宁；

【导师】 刘健新；

【作者基本信息】 长安大学 ， 桥梁与隧道工程， 2003， 硕士

【摘要】 本论文介绍了国内外减、隔震技术的发展情况和减震桥梁的动力特点。按照两阶段设计的方法，减震桥梁在小震L₁和大震L₂等级时对减震装置的位移要求不同。根据这一特点提出了减震伸缩装置的功能要求和研究的重要性。提出两种减震伸缩装置的构造形式，并对这两种减震伸缩装置进行了详细的细部构造设计。论文阐述减震桥梁的常用计算理论。推导了反应谱法计算桥梁在地震作用下上部结构相对位移的理论公式。讨论了伸缩缝两侧桥梁结构的自振周期对桥梁上部结构在地震作用下的相对位移的影响。论文以Ⅱ类场地土、8度设防为例，采用桥梁结构非线性地震响应分析程序NBA（The program of Nonlinear-seismic Analysis for Beam Bridge）计算了大量桥梁在地震作用下上部结构的相对位移。提出了常规桥梁在地震作用下上部结构相对位移的简化计算公式。使工程技术人员能方便地计算地震作用下桥梁上部结构的相对位移和选定减震伸缩装置。更多还原

【Abstract】 In this paper ,the development of anti-seismic technology of bridge home and aboard and the dynamic force characteristics of the bridge is introduced. According to two stage device that design, damping device used in bridge in the small earthquake different from that strong earthquake . the function of the anti-seismic expansion and contraction installation and the research’s importance is mentioned. Two styles of anti-seismic expansion and contraction installation and the detail structure of each is designed. The anti-seismic principle in common use of bridge is mentioned and the principle for calculating the relative displacement of bridges’ superstructure under the earthquake is evaluated. The two adjacent structures at the expansion and contraction distance are different intrinsic period and the influence to the relative displacement of the difference is discussed in this paper. A lot of bridge at the n site category is calculated under the 8 degree earthquake, and the program of NBA(The Program of Nonlinear-Seismic Analysis for Beam Bridge) is used to calculate. The simple formula for calculating the superstructure’s relative displacement of bridge under the earthquake is evaluated to calculate the superstructure’s relative displacement of bridge under the earthquake and select the mode of anti-seismic expansion and contraction installation easily for engineers.更多还原