Space-Time Variation of Strong Ground Motion and its Effect on Structures

强地震动时空变化及其对结构的影响

• 批准号: 8605184
• 负责人: Ronald Harichandran
• 金额: $ 6.48万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-01-01 至 1989-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8605184&HistoricalAwards=false
• 关键词: Space; Time; Variation; Strong; Ground

Current practice in earthquake engineering is to model earthquake- induced strong ground motions as accelerations occurring at single locations; or at most to use simple physical wave propagation models employing simple waveforms. This research program will develop a description of the spatial variation of earthquake ground motions that models observed motions, using data from strong-motion seismograph arrays. In addition, the effects of these spatial variations in ground motion on the response of structures will be studied. The investigation will utilize digital signal processing techniques, simulation of correlated multiple excitations, random vibration analysis, and deterministic dynamic analysis. The research has direct application to the design of structures on large foundations, such as dams and containment structures for nuclear power plants; to spatially extended structures with multiple supports such as occurs in long-span bridges and surface pipelines; and to long buried structures, including electric power, telecommunication, oil, gas, water and sewage lifelines. The principal investigator is highly qualified and has the institutional facilities available to undertake the proposed research program.

当前地震工程的实践是将地震引起的强烈地面运动建模为发生在单个位置的加速度；或者至多使用采用简单波形的简单物理波传播模型。 该研究计划将利用强震地震仪阵列的数据，对地震地面运动的空间变化进行描述，对观测到的运动进行建模。 此外，还将研究地面运动的这些空间变化对结构响应的影响。 该研究将利用数字信号处理技术、相关多重激励模拟、随机振动分析和确定性动态分析。 该研究可直接应用于大型基础结构的设计，例如核电站的水坝和安全壳结构；具有多个支撑的空间延伸结构，例如大跨度桥梁和地面管道中出现的结构；以及长埋地结构，包括电力、电信、石油、天然气、水和污水生命线。 主要研究者资质很高，并拥有可用于开展拟议研究项目的机构设施。