Real-time Multi-directional Testing Facility for Seismic Performance Simulation of Large-Scale Structural Systems

摘要：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和设施建设拨款项目。根据NEES的这项合作协议，在利哈伊大学建立了NEES大型实验室设备场地，以进行实时混合地震试验。利哈伊大学将设计、建造、安装、调试和运营用于大型结构系统地震性能模拟的实时多方向测试设施。该设备提供了综合实验和分析研究的能力，并将导致实验方法的进步。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。该NEES设备点将通过中大西洋GigaPop互联网2(MagPI)连接到NEES网络，具有155 Mb/秒的以太网能力，必要时可扩展到1 Gb/秒的以太网能力。共享使用准入和培训将通过NEES联盟进行协调。该奖项是对提交给项目征集NSF 01-164“NEES地震工程研究设备，第二阶段”的建议进行同行评审的结果。该设备将安装在位于利哈伊大学的ATLSS工程研究中心，并将利用现有的坚固地板(表面积为372平方米)、现有的多向反力墙(一端高15.2米，在32米的距离上从12.2米逐步下降到9.1米到6.1米)、现有的机械测试实验室、现有的液压系统和现有的静态执行器。本合同提供下列设备：(1)2个2050 kN动态执行器，用于3个400 GPM伺服阀，+/-500 mm冲程，(2)3个1500 kN动态执行器，用于3个400 GPM伺服阀，+/-500 mm冲程，(3)10个400 GPM高流量伺服阀，(4)液压分配管路和服务歧管，(5)调压室和蓄能器，可使强烈的地面运动效果持续30秒以上，(6)液压系统改进，(7)带有实时混合控制包的数字8通道控制系统，(8)数字视频远程观测系统，包括数字高质量摄像机、网络摄像机、数字视频服务器、数据服务器、受限访问Web服务器和公共访问Web服务器系统；(9)高速256通道数据采集系统；(10)先进传感器，包括基于无线MEMS的加速度计、压电式传感器(应变和加速度测量)和光纤应变计。该实验设施允许进行多方向的实时地震试验，并结合实时分析模拟，通过组合使用动力作动器、反力墙和坚固楼板来研究大型结构部件、结构部件和超级部件(系统)的抗震性能。该实验设施还旨在支持开发新的混合测试方法，用于大型结构的多方向实时测试，包括多个子结构的混合测试，其中参与测试的子结构位于通过NEES网络连接的不同地理位置。利哈伊大学将这一大规模实时多向测试设施整合到其研究计划和本科生和研究生课程中，通过现场课程和网络材料为外部研究人员提供培训机会，并接待访问学者。

AbstractRicles0217393The George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Program is a project funded under the NSF Major Research Equipment and Facilities Construction appropriation. This cooperative agreement, under NEES, establishes a NEES large-scale laboratory equipment site towards real-time hybrid seismic testing at Lehigh University. Lehigh University will design, construct, install, commission, and operate a real-time multi-directional testing facility for seismic performance simulation of large-scale structural systems. The equipment provides the capabilities of integrated experimental and analytical research, and will lead to advances in experimental methods. 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 for large structural systems through 2014. This NEES equipment site will be connected to the NEES network through the Mid-Atlantic GigaPop Internet 2 (MAGPI) connection, with 155 Mb/sec Ethernet capabilities that can be scaled to 1 Gb/sec Ethernet capabilities when necessary. 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 01-164, "NEES Earthquake Engineering Research Equipment, Phase 2." The equipment will be installed at the ATLSS Engineering Research Center located at Lehigh University, and will make use of the existing strong floor (372 m2 in surface area), existing multi-directional reaction wall (15.2 m tall at one end that, over a distance of 32 m, steps down incrementally from 12.2 m to 9.1 m to 6.1 m), an existing mechanical testing laboratory, existing hydraulic systems, and existing static actuators. The following equipment is provided under this award: (1) two 2050 kN dynamic actuators ported for three 400 gpm servovalves, +/- 500 mm stroke, (2) three 1500 kN dynamic actuators ported for three 400 gpm servovalves, +/- 500 mm stroke, (3) ten 400 gpm high flow-rate servo-valves, (4) hydraulic distribution lines and service manifolds, (5) surge tank and accumulators that will enable strong ground motion effects to be sustained for over 30 seconds, (6) hydraulic system modifications, (7) digital 8-channel control system with real-time hybrid control packages, (8) digital video teleobservation system including a system of digital high quality video cameras, network video cameras, digital video server, data server, restricted access web server, and a public access web server, (9) high speed 256-channel data acquisition system, and (10) advanced sensors that include wireless MEMS-based accelerometers, piezoelectric transducers (strain and acceleration measurement), and fiber optic strain gages. The experimental facility allows for multi-directional real-time seismic testing, combined with real-time analytical simulations, to investigate the seismic behavior of large-scale structural components, structural subassemblages, and superassemblages (systems) through the combined use of the dynamic actuators, reaction wall, and strong floor. The experimental facility is also designed to support the development of new hybrid testing methods for multi-directional real-time testing of large-scale structures, including hybrid testing of multi-substructures, where the substructures involved in such testing are at different geographic locations connected by the NEES network. Lehigh University will integrate this large-scale real-time multi-directional testing facility into its research program and undergraduate and graduate curricula, provide training opportunities for outside researchers through on-site courses and web-based materials, and host visiting scholars.