SGER: Testing of a New Line of Seismic Base Isolators

摘要：提出了在防震减灾领域开展小规模探索性高风险研究的设想。该项目的目标和重要性在于通过一种创新但未经测试的设计方法来改进被称为地震基础隔震的防震技术。拟议的创新将以一种简单可靠的隔离周期可控的基础隔离单元为目标。这种隔震装置可以为受保护的建筑上部结构提供非常有效的频率隔离。类似的方法既不存在于公共领域，也不存在于商业领域。该项目将包括：(1)对隔震装置的三自由度模型进行分析估计，并验证这种结构元件在建筑物抗震中的有效性；(2)对小比例建筑模型进行振动台试验，以便在两个水平方向上应用各种全尺寸地震输入；(3)对项目成果进行评估，并验证是否达到了其目标。研究的学术价值在于，它将使人们更好地理解基础隔震的机理，将其作为一种智能和实用的方法来减轻建筑结构中的地震诱导力。这项研究的更广泛的影响是：(1)它可以促进在研究和实施这类新建筑设计和改造现有建筑以抵御地震危险的系统方面取得快速和创新的进展，以及(2)研究结果将与土木工程和教育界分享，特别是通过创建一个包含振动台实验视频剪辑的门户网站。

Abstract : 0618183A small-scale exploratory high-risk research is proposed in the field of earthquake hazard mitigation. The goal and importance of the project lay in improvement of the earthquake-protective technique known as seismic base isolation with the help of an innovative but untested design approach. The proposed innovation will target a simple and reliable base isolation unit with a controllable isolating period. This isolation unit may provide a very effective frequency separation for the protected building superstructure. A similar approach neither exists in the public domain nor commercially. The project will include: (1)Analytical estimation of a three-degrees-of-freedom model of the isolation device and verification of how effective this structural element could be utilized for the earthquake protection of buildings; (2)Shake table testing of small-scale building model for a variety of full-scale earthquake inputs applied in two horizontal dimensions; (3)Evaluation of results of the project and verification of whether its objectives are being met. The intellectual merit of study is that it will provide a better understanding of the mechanism of seismic base isolation as a smart and practical way of mitigating earthquake induced forces in the building structures. The broader impacts of the study are (1)that it may catalyze rapid and innovative advances in the research and implementation of this type of system for design of new buildings and retrofit of existing ones to shield them against earthquake hazards, and (2) that findings of the research will be shared with the civil engineering and education communities, in particular, through creation of a web portal containing video clips of shake table experiments.