Development of a biaxial multiple shake table research facility

乔治E.小布朗地震工程模拟网络（NEES）计划是美国国家科学基金会主要研究设备计划资助的一个项目。 根据NEES计划，该合作协议在内华达州里诺市的内华达州里诺大学建立了NEES双轴多次振动台研究设备场地。 内华达州里诺大学将设计、建造、安装、调试和操作一个新的双轴振动台，并升级现有的两个振动台，用于大规模岩土工程和长线性结构和生命线地震工程实验。 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设备站点进行管理，具有远程观测和远程操作能力，为2014年之前的大型结构系统提供新的地震工程研究测试能力。 该NEES设备站点将通过高性能的内华达州研究网络连接到NEES合作实验室，该研究网络作为该大学与具有千兆以太网功能的Internet 2的Abilene网络的连接。 共享使用的访问和培训将通过NEES联盟进行协调。 该奖项是对提交给NSF 00 - 6“NEES：地震工程研究设备”项目招标的提案进行同行评审的结果。"根据这项裁决提供了下列设备：（1）一个新的、可重新定位的、4.3 x 4.5 m、445 kN有效载荷、+1 g、+300 mm位移（纵向和横向）振动台，（2）将现有的两个可移动的445 kN振动台从单轴振动台升级为双轴振动台（纵向和横向）能力，与新表相同，（3）新的液压分配管线，（4）与现有排相同容量的新排污排，（5）通过增加第三台泵（720 lpm）升级液压动力供应，（6）用于三个台的数字控制系统，（7）扩展现有的数据采集系统，以适应远程观察、远程操作、远程传输和远程存储，以及（8）用于远程观察和远程操作能力的设备，使得台上的实验将通过高性能网络连接被观察和控制。 该设施将包括三个双轴振动台，这将是可重新定位的强大的地板上的大型结构实验室在内华达州里诺校园。 将使用各种表格配置来满足当前和未来的研究需求。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，用于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。 这些包括地震地面运动的空间变化的研究关键扩展在计划中的生命线系统，长结构系统及其组件的双轴响应，以及非常大规模的系统，无论是物理上太大，现有的，单表设施，或太重，或两者兼而有之的行为。 这三个工作台可以承载总重量高达1.35 MN的试样，工作台中心线到中心线之间的距离最大为36 m。 本提案中请拨的设备费用总额为7 017 200美元。 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NSF的预算要求减少到4，398，450美元。 该大学将把这种振动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推广活动中。 联合国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.