RAPID: NEES/E-Defense Collaboration for Design of E-Defense Smart Base Isolation Experiments

该奖项使美国和日本的研究人员能够合作设计智能基础隔离实验，该实验将使用日本位于三木的地球防御(E-Defense)振动台设施进行。这项工作对时间很敏感，因为日本国家地球科学和灾害预防研究所最近承诺为这些实验提供资源，高层概念设计将在2011年4月至6月期间完成，随后将于2011年8月完成分析和模拟。进一步的设计和细节将在明年秋冬两季进行，2012年动工，2012年底或2013年初测试。日本防务研究人员计划测试一座三到四层的三维非对称钢筋混凝土上部结构的抗震性能，该上部结构融合了不同的智能基础隔震系统。除了隔震层中的线性橡胶支座，试验还将包括半主动可控减震装置，以探索其在比传统隔震(固定系统)更广泛的地面运动中改善抗震性能的潜力，并考虑美国研究人员可能提出的其他类型的装置。这一双边合作汇集了受控基座隔离和半主动装置以及实验设计和执行方面的专业知识，使两国能够最大限度地从实验中获益。在2009年、2010年和2011年举行的NEES/E-Defense联合规划会议上，促进了这些实验的动力和这一国际合作的机会，这是NEES/E-Defense隔离和控制联合工作组的成果。该奖项支持几名美国研究人员前往日本，与E-Defense的研究人员直接合作，设计智能基地隔离实验，包括上层建筑、隔离系统策略、仪器和测试后分析。该奖项还支持做出实验设计决策所需的设计分析和模拟。计划中的具有半主动可控减震装置的基础隔震结构的E-Defense实验是独一无二的，为美国研究人员提供了参与目前在美国无法进行的全尺寸实验的一次性机会。这些E-Defense实验将使研究人员能够通过将隔震效果扩展到比当前传统隔震技术所能实现的更广泛的地面运动来调查和校准可控阻尼器可实现的抗震性能水平。这些测试将是磁流变液阻尼器在这种规模下用于基座隔离的第一次实验室实验。该奖项将促进NEES和E-Defense之间的新的研究合作，并在美国和日本的研究人员之间建立新的联系。实验设计和结果数据将通过已经成立的NEEShub小组(http://nees.org/groups/isolationcontrol).)传播给研究社区

This award enables U.S. and Japanese researchers to collaborate on the design of smart base isolation experiments to be conducted using Japan's Earth Defense (E-Defense) shake table facility in Miki, Japan. This effort is time sensitive as Japan's National Research Institute for Earth Science and Disaster Prevention has recently committed the resources for these experiments, with high-level conceptual design to be completed during April through June 2011, followed with analysis and simulations completed by August 2011. Further design and detailing will occur next fall and winter, construction in 2012, and testing in late 2012 or early 2013. Japanese/E-Defense researchers plan to test the seismic performance of a three-to-four story, three-dimensional asymmetric reinforced concrete superstructure that incorporates different smart base isolation systems. In addition to linear rubber bearings in the isolation layer, tests will incorporate semi-active controllable damping devices to explore their potential for improving seismic performance over a wider array of ground motions than is possible with conventional isolation (fixed systems), as well as consider other types of devices that U.S. researchers may propose. This bilateral collaboration brings together expertise in controlled base isolation and semi-active devices, as well as experimental design and execution, so that both countries can maximize benefits from the experiments. The impetus for the experiments and the opportunities for this international collaboration were fostered in joint NEES/E-Defense planning meetings in 2009, 2010 and 2011 and is the outcome of the joint NEES/E-Defense Isolation and Control Working Group. This award supports several U.S. researchers to travel to Japan to work directly with E-Defense researchers on the design of the smart base isolation experiments, including superstructure, isolation system strategies, instrumentation, and post-test analyses. This award also supports the necessary design analyses and simulations to make experimental design decisions.The planned E-Defense experiments of a base isolated structure with semi-active controllable damping devices are unique and provide a one-time opportunity for U.S. researchers to participate in full-scale experiments that currently cannot be conducted in the U.S. These E-Defense experiments will enable researchers to investigate and calibrate the level of seismic performance achievable with controllable dampers by extending isolation effectiveness to a much broader array of ground motions than possible with current conventional isolation technology. The tests will be the first laboratory experiments of magnetorheological fluid dampers at this scale for base isolation. This award will foster new research collaboration between NEES and E-Defense, as well as build new ties between U.S. and Japanese researchers. The experimental designs and resulting data will be disseminated to the research community via an already-established NEEShub group (http://nees.org/groups/isolationcontrol).