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

[摘要][0217393]乔治·布朗地震工程模拟台网（NEES）项目是美国国家科学基金会重大研究设备与设施建设专项资助的项目。根据NEES的合作协议，在Lehigh大学建立了一个用于实时混合地震测试的NEES大型实验室设备站点。利哈伊大学将设计、建造、安装、调试和操作一个实时多向测试设施，用于大型结构系统的地震性能模拟。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设备站点将通过中大西洋千兆互联网2 （MAGPI）连接到NEES网络，具有155 Mb/秒的以太网能力，必要时可以扩展到1 Gb/秒的以太网能力。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 01-164“NEES地震工程研究设备，第二阶段”的提案进行同行评审的结果。该设备将安装在位于理哈伊大学的ATLSS工程研究中心，并将利用现有的坚固地板（表面积372平方米）、现有的多向反应墙（一端高15.2米，在32米的距离上，从12.2米逐渐下降到9.1米，再下降到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。根据本合同提供以下设备：(1)两个2050千牛的动态执行器，用于三个400千牛的伺服阀，+/- 500毫米行程，(2)三个1500千牛的动态执行器，用于三个400千牛的伺服阀，+/- 500毫米行程，(3)十个400千牛的高流量伺服阀，(4)液压分配管线和服务管汇，(5)调压箱和蓄能器，将使强烈的地面运动效应持续30秒以上，(6)液压系统修改，(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，包括由数字高质量摄像机、网络摄像机、数字视频服务器、数据服务器、限制访问web服务器和公共访问web服务器组成的系统；(9)高速256通道数据采集系统；（10）先进传感器，包括基于mems的无线加速度计、压电传感器（应变和加速度测量）；还有光纤应变计。实验设施允许多向实时地震测试，结合实时分析模拟，通过结合使用动态执行器、反应墙和坚固楼板，来研究大型结构部件、结构子组合和超组合（系统）的地震行为。该实验设施还旨在支持开发新的混合测试方法，用于大型结构的多向实时测试，包括多子结构的混合测试，其中参与此类测试的子结构位于由NEES网络连接的不同地理位置。利哈伊大学将把这种大规模的实时多向测试设备整合到其研究项目和本科和研究生课程中，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.