Development of a biaxial multiple shake table research facility

小乔治·布朗地震工程模拟网络（NEES）项目是由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，该合作协议将在内华达州里诺市内华达大学里诺分校建立NEES双轴多(3)振动台研究设备基地。内华达大学里诺分校将设计、建造、安装、调试和操作一个新的双轴振动台，并对两个现有的振动台进行升级，用于大型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，到2014年为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内华达研究网络连接到NEES合作实验室，该研究网络作为该大学与Internet2的阿比林网络的连接，具有千兆以太网功能。共享使用的获取和培训将通过NEES联盟进行协调。该奖项是对提交给项目招标NSF 00-6“NEES：地震工程研究设备”的提案进行同行评审的结果。根据本合同提供以下设备：(1)一个新的，可移动的，4.3 x 4.5米，445千牛载荷，+1克，+ 300毫米位移（纵向和横向）振动台，(2)升级到两个现有的，可移动的，445千牛振动台，从单轴到双轴（纵向和横向）能力，与新工作台相同，(3)新的液压分配管线，(4)新的排空银行与现有银行相同的能力，(5)升级液压电源，通过增加第三个泵（720 lpm），(6)三个工作台的数字控制系统；(7)扩展现有的数据采集系统，以适应远程观测、远程操作、远程传输和远程存储；(8)远程观测和远程操作能力设备，以便通过高性能网络连接对工作台上的实验进行观察和控制。该设施将由三个双轴振动台组成，可在内华达大学里诺校区的大型结构实验室的坚固地板上重新定位。各种表配置将被用来满足当前和未来的研究需要。此外，在模拟地震地面运动的空间变化效应时，每个表可以独立于其他两个表运行，也可以与其他两个表同步运行（从而形成一个大表），也可以与其他两个表不同。该设施将是美国同类设施中唯一的一个，将使下一代实验得以进行。这些研究包括在关键的平面延伸生命线系统上地震地面运动的空间变化，长结构系统及其组件的双轴响应，以及对于现有的单台设施来说物理上太大或太重或两者兼而有之的超大系统的行为。三个工作台加在一起可容纳总重量达1.35 MN的标本，工作台之间的中心线间距最大可达36米。本建议所要求的设备费用总额为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，将对NSF的预算请求减少到4,398,450美元。该大学将把这种振动台设备整合到其研究项目、本科生和研究生助教奖学金和实习、高中夏令营和K-12外展活动中。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.