Large High Performance (LHP) Outdoor Shake Table

摘要CMS-0217293 SeibleThe乔治E.小布朗地震工程模拟网络（NEES）是国家科学基金重大研究设备和设施建设项目。根据NEES授予的这项合作协议，在加州大学圣地亚哥分校（UCSD）建立了一个NEES大型高性能（LHP）室外振动台场地，并且是对提交给项目征集NSF 01-164“NEES：地震工程研究设备，第2阶段”的提案进行同行评审的结果。“这个室外振动台将是一个7.6 m x 12.2 m长的单（水平）自由度系统。该平台的峰值水平速度为1.8 m/s，最大行程为+/-0.75 m，最大重力（垂直）有效载荷为200 MN，最大倾覆力矩为50 MN-m，致动器的力容量为6.8 MN，频率带宽为0-20 Hz。 LHP振动台设施的主要设备包括伺服控制的动态额定执行器与大型伺服阀，大电源，垂直载荷/倾覆力矩轴承系统，数字三变量实时控制器，混凝土基础和反作用质量，以及防风雨系统。 该设施将是美国唯一的室外振动台，将能够对结构系统和土壤-基础-结构相互作用进行大规模/全尺寸测试，这些测试无法从较小规模的测试或准静态或伪动态测试条件下进行推断，以及测试大型系统以观察其在近源地面运动下的响应。 LHP室外振动台将位于距离校园15公里的UCSD Camp Elliott现场。 选择这个两英亩的场地，以便振动台可以与加州交通部提供的相邻土坑和层状剪切土箱结合使用。 在放置到振动台上之前，该位置将为多个待构建和仪器化的测试样本留出空间。将在埃利奥特营地提供一台177千牛的越野起重机，用于装卸和日常施工。 对于较重的起重能力，将根据需要租赁一台880 kN起重机，个别实验需要较大的起重机来支付这一费用。 该设备将于2004年9月30日投入使用，并将作为国家共享的NEES设备站点进行管理，具有远程观测和远程操作能力，到2014年提供新的地震工程研究测试能力。 共享使用的访问和培训将通过NEES联盟进行协调。UCSD为该设施提供了1，363，000美元的费用分摊。UCSD将把这种振动台设备整合到其研究计划中，涉及本科生和研究生、结构工程系课程、K-12和一般公众宣传。 该大学还将通过基于网络的教程和现场培训为外部教师，学生和从业人员提供培训机会。

AbstractCMS-0217293SeibleThe George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) is a project funded under the National Science Foundation Major Research Equipment and Facilities Construction account. This cooperative agreement, awarded under NEES, establishes a NEES large high performance (LHP) outdoor shake table site at the University of California, San Diego (UCSD) and is an outcome of the peer review of proposals submitted to program solicitation NSF 01-164, "NEES: Earthquake Engineering Research Equipment, Phase 2." This outdoor shake table will be a 7.6 m x 12.2 m long single (horizontal) degree-of-freedom system. The table will have a peak horizontal velocity of 1.8 m/s, maximum stroke of +/-0.75 m, maximum gravity (vertical) payload of 200 MN, maximum overturning moment of 50 MN-m, force capacity of actuators of 6.8 MN, and a frequency bandwidth from 0-20 Hz. The major equipment for the LHP shake table facility consists of servocontrolled dynamically-rated actuators with large-servo valves, a large power supply, a vertical load/overturning moment bearing system, a digital three-variable real-time controller, concrete foundation and reaction mass, and weatherproofing system. The facility will be the only outdoor shake table in the U.S. and will enable large/full-scale testing of structural systems and soil-foundation-structure interaction that cannot be readily extrapolated from testing at smaller scale, or under quasi-static or pseudo-dynamic test conditions, as well as testing large-scale systems to observe their response under near source ground motion. The LHP outdoor shake table will be located 15 km from campus at the UCSD Camp Elliott field site. This two-acre site was selected so that the shake table could be used in conjunction with an adjacent soil pit and laminar shear soil box being provided by the California Department of Transportation. This site will allow room for multiple test specimens to be constructed and instrumented before placement on the shake table. A 177 kN rough terrain crane will be provided at Camp Elliott for loading, unloading, and everyday construction purposes. For heavier lifting capabilities, an 880 kN crane will be available on an as needed rental basis, with the individual experiment requiring the larger crane to cover this cost. This equipment will be operational by September 30, 2004, and will be managed as a national shared-use NEES equipment site, with teleobservation and teleoperation capabilities, to provide new earthquake engineering research testing capabilities through 2014. Shared-use access and training will be coordinated through the NEES Consortium. UCSD is providing $1,363,000 in cost sharing for this facility. UCSD will integrate this shake table equipment into its research program involving undergraduate and graduate students, Department of Structural Engineering curriculum, and K-12 and general public outreach. The University will also provide training opportunities for outside faculty, students, and practitioners through web-based tutorials and on-site training.