...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Required separation distance between decks and at abutments of a bridge crossing a canyon site to avoid seismic pounding
【24h】

Required separation distance between decks and at abutments of a bridge crossing a canyon site to avoid seismic pounding

机译：跨峡谷位置的桥面之间和桥墩之间所需的分隔距离，以避免地震的冲击

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Major earthquakes in the past indicated that pounding between bridge decks may result in significant structural damage or even girder unsealing. With conventional expansion joints, it is impossible to completely avoid seismic pounding between bridge decks, because the gap size at expansion joints is usually not big enough in order to ensure smooth traffic flow. With a new development of modular expansion joint (MEJ), which allows a large joint movement and at the same time without impeding the smoothness of traffic flow, completely precluding pounding between adjacent bridge decks becomes possible. This paper investigates the minimum total gap that a MEJ must have to avoid pounding at the abutments and between bridge decks. The considered spatial ground excitations are modelled by a filtered Tajimi-Kanai power spectral density function and an empirical coherency loss function. Site amplification effect is included by a transfer function derived from the one-dimensional wave propagation theory. Stochastic response equations of the adjacent bridge decks are formulated. The effects of ground motion spatial variations, dynamic characteristics of the bridge and the depth and stiffness of local soil on the required separation distance are analysed. Soil-structure interaction effect is not included in this study. The bridge response behaviour is assumed to be linear elastic.
机译：过去的大地震表明，桥面板之间的撞击可能会导致严重的结构损坏，甚至可能导致梁开封。对于传统的伸缩缝，不可能完全避免桥面板之间的地震撞击，因为伸缩缝处的缝隙大小通常不足以确保顺畅的交通流量。随着模块化伸缩缝（MEJ）的新发展，它允许较大的伸缩缝移动，同时又不妨碍交通顺畅，完全可以避免相邻桥面板之间的碰撞。本文研究了MEJ避免在基台和桥面板之间发生碰撞所必须具有的最小总间隙。考虑的空间地面激励是通过滤波的Tajimi-Kanai功率谱密度函数和经验相干损失函数建模的。从一维波传播理论导出的传递函数包括位点放大效应。建立了相邻桥面板的随机响应方程。分析了地震动的空间变化，桥梁的动力特性以及局部土壤的深度和刚度对所需分隔距离的影响。本研究不包括土壤-结构相互作用的影响。桥响应行为假定为线性弹性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号