Development of a biaxial multiple shake table research facility

小乔治·E·布朗。地震工程模拟网络(NEES)计划是美国国家科学基金会重大研究设备计划资助的一个项目。根据NEES计划，这项合作协议将在内华达州雷诺市的内华达大学建立NEES双轴多(3)振动台研究设备基地。内华达·雷诺大学将设计、建造、安装、调试和运营一个新的双向振动台，并对现有的两个振动台进行升级，用于大规模岩土工程和长时间线性结构和生命线地震工程试验。该设备将于2004年或更早投入使用，并将作为国家共享使用的NEES设备场地进行管理，具有远程观测和远程操作能力，以在2014年前为大型结构系统提供新的地震工程研究测试能力。NEES的这个设备点将通过高性能的内华达州研究网络连接到NEES协作室，该网络是大学与具有千兆以太网能力的Internet2‘S阿比林网络的连接。共享使用准入和培训将通过NEES联盟进行协调。该奖项是对提交给NSF 00-6计划征集项目“NEES：地震工程研究设备”的建议进行同行评审的结果。本合同提供下列设备：(1)一个新的、可重新定位的4.3x4.5米、445kN有效载荷，+1g，+300 mm位移(纵向和横向)振动台，(2)升级到两个现有的、可移动的445kN振动台，从单轴到双向(纵向和横向)能力，与新的工作台相同，(3)新的液压分配线路，(4)新的排污槽，与现有平台能力相同，(5)升级的液压动力供应，通过增加第三个泵(720LPM)，(6)三个工作台的数字控制系统；(7)现有数据采集系统的扩展，以适应远程观测、远程操作、远程传输和远程存储；以及(8)具有远程观测和远程操作能力的设备，以便通过高性能的网络连接来观察和控制在工作台上进行的实验。该设施将由三个双向振动台组成，它们将可重新安置在内华达大学雷诺校区大型结构实验室的坚固地板上。将使用各种桌子配置来满足当前和未来的研究需要。此外，每个表可以独立于其他两个表操作，与其他两个表同相(从而形成单个大表)，或者与其他两个表不同地操作，以模拟地震地面运动中的空间变化效应。该设施将是美国唯一的此类设施，将使下一代实验得以进行。这些研究包括研究地震地面运动在关键扩展计划生命线系统上的空间变化，长结构系统及其组件的双轴响应，以及超大规模系统的行为，这些系统要么在物理上对现有的单表设施来说太大，要么太重，或者两者兼而有之。三个工作台加在一起可以容纳总重量达1.35MN的标本，工作台的中心线到中心线的距离最大可达36m。本提案所需设备的总费用为7 017 200美元。为了实现这一目标，该大学已经从美国能源部(1,000,000美元)和美国住房和城市发展部(1,618,750美元)获得了2,618,750美元，将向NSF提出的预算申请减少到4,398,450美元。该大学将把这种摇台设备整合到其研究计划、本科生和研究生助教和实习、高中夏令营和K-12外联活动中。该大学还将通过现场课程和讲习班为外部研究人员提供培训机会。

The George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Program is a project funded under the NSF Major Research Equipment Program. This cooperative agreement, under the NEES Program, establishes a NEES biaxial multiple (3) shake table research equipment site at the University at Nevada Reno, Reno, Nevada. The University of Nevada Reno will design, construct, install, commission, and operate one new biaxial shake table and the upgrade of two existing shake tables for large-scale geotechnical and long, linear structural and lifeline earthquake engineering experimentation. This equipment will be operational by 2004 or earlier 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 for large structural systems through 2014. This NEES equipment site will be connected to the NEES collaboratory through the high-performance Nevada Research Network that serves as the University's connection to Internet2's Abilene Network, with Gigabit Ethernet capabilities. Shared-use access and training will be coordinated through the NEES Consortium. This award is an outcome of the peer review of proposals submitted to program solicitation NSF 00-6, "NEES: Earthquake Engineering Research Equipment." The following equipment is provided under this award: (1) one new, relocatable, 4.3 x 4.5 m, 445 kN payload, +1 g, + 300 mm displacement (longitudinal and lateral) shake table, (2) upgrades to two existing, moveable, 445 kN shake tables from uniaxial to biaxial (longitudinal and lateral) capability, to be identical to the new table, (3) new hydraulic distribution lines, (4) new blowdown bank with the same capacity as the existing banks, (5) upgraded hydraulic power supply, by addition of a third pump (720 lpm), (6) digital control system for three tables, (7) expansion of existing data acquisition system to accommodate teleobservation, teleoperation, teletransmission, and telestorage, and (8) equipment for teleobservation and teleoperation capabilities so that experiments on the tables will be observable and controllable via high performance network connections. The facility will consist of three biaxial shake tables, which will be relocatable on the strong floor of the Large-Scale Structures Laboratory on the University of Nevada Reno campus. A variety of table configurations will be used to meet present and future research needs. Furthermore, each table may be operated independently of the other two tables, in-phase with the other two tables (thus forming a single large table), or differentially with the other two tables for the simulation of spatial variation effects in earthquake ground motions. The facility will be the only one of its kind in the United States and will enable next generation experiments to be conducted. These include studies of spatial variation in earthquake ground motion on critical extended-in-plan lifeline systems, the biaxial response of long structural systems and their components, and the behavior of very large-scale systems that are either physically too large for existing, single-table facilities, or too heavy, or both. Together the three tables can host specimens up to 1.35 MN in total weight, with the tables separated up to a maximum of 36 m centerline-to-centerline. The total cost of the equipment requested in this proposal is $7,017,200. The University has already obtained $2,618,750 towards this goal from the U.S Department of Energy ($1,000,000) and the U.S. Department of Housing and Urban Development ($1,618,750) reducing the budget request to NSF to $4,398,450. The University will integrate this shake table equipment into its research program, undergraduate and graduate assistantships and internships, high school summer camps, and K-12 outreach. The University will also provide training opportunities for outside researchers through on-site courses and workshops.