Seismic Response and Retrofit Studies of Selected Steel and Composite Buildings

这是一个事后调查项目， 从洛马普列塔地震（10月）中吸取的工程经验教训 1989年）。 洛马普列塔地震产生了重要的信息 工程结构的性能受到强烈的 地动山摇 从地震仪产生的强震数据 仪表化建筑提供了一个独特的机会， 提高对抗震性能的认识， 并制定改进的方法 为他们的设计。 三钢组合建筑 结构已被选定为详细的研究， 项目 一个遭受了严重的结构性破坏，另一个 经历了过度的摇摆运动，第三个显示 非常出色的表现。 两项主要研究任务将是 进行。 一是进行分析计算 研究这些建筑物的地震反应， 记录了它们的基底运动， 分析结果与上部记录的响应 程度. 对于严重受损的建筑物非弹性时间- 并会进行历史分析。 第二任务 是制定改造或加强计划，以改善 受损建筑物和建筑物的抗震性能 经历过度的动态运动。 该研究将提高对抗震性能的理解 钢结构的性能数据的基础上， 大地震

This is a post-event investigation project to learn engineering lessons from the Loma Prieta earthquake (October 1989). The Loma Prieta earthquake has produced important information on performance of engineered structures subjected to strong ground shaking. The strong-motion data generated from the instrumented buildings provide a unique opportunity to further advance the knowledge about the seismic behavior and resistance of buildings and to develop improved methodologies for their design. Three steel and composite building structures have been selected for detailed studies in this project. One suffered serious structural damage, another experienced excessive sway motion, and the third showed excellent performance. Two main research tasks will be conducted. The first is to perform analytical calculations to study the seismic response of these buildings using the recorded motions at their basement and to correlate the analytical results with the recorded responses at the upper levels. For the seriously damaged building inelastic time- history analyses will also be carried out. The second task is to develop retrofit or strengthening schemes to improve the seismic performance of the damaged building and the building experiencing excessive dynamic motion. The study will improve the understanding of seismic behavior of steel structures based on the performance data during a major earthquake.