Reconfigurable Reaction Wall-based Earthquake Simulator Facility

可重构反应墙地震模拟器设施

• 批准号: 0086621
• 负责人: Jack Moehle
• 金额: $ 426.83万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Cooperative Agreement
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-01 至 2004-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0086621&HistoricalAwards=false
• 关键词: Reconfigurable; Reaction; Wall; based; Earthquake

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 reconfigurable reaction wall-based earthquake simulator facility at the University of California, Berkeley (UCB), California. UCB will design, construct, install, commission, and operate a modular and highly flexible dynamic testing facility that will enable experimental and analytical model-based simulation of interactions among substructures that form a single structure. The knowledge gained from such simulations will help develop a new generation of performance-based design guidelines and implement them in practice to improve the safety and reliability of civil infrastructure. This equipment will be operational by September 30, 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 University's Abilene connection, with 1-2 Gb/sec 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 equipment will be installed in Building 484 at the Richmond Field Station of UCB and will make use of the existing strong floor, existing four-million-pound axial compression-tension testing machine, and an array of existing static and dynamic actuators. The following equipment is provided under this award: (1) reconfigurable reaction wall, with post-tensioning bars and couplers, (2) seven dynamic and static actuator assemblies: four dynamic, two rated at 50 kips (222 kN) with 40-in (1016 mm) stroke minimum and two rated at 150 kips (667 kN) with 40-in (1016 mm) stroke minimum, and three static, one rated at 446/600 kips (1984/2669 kN) with 40-in (1016 mm) stroke and two rated at 216/328 kips (961/1459 kN) with 72-in (1829 mm) stroke, (3) one hydraulic distribution system, (4) one high-performance accumulation system, (5) one digital control system with real-time hybrid control packages and integrated data acquisition channels, comprising hardware for 8 control channels and 16 additional data acquisition channels and software development kits, (6) advanced data acquisition system with a modular 128-channel data acquisition system with A/D converter, (7) digital video teleobservation system including a system of digital cameras, digital video recorders and a digital video Internet server, (8) instrumentation that includes potentiometer-based displacement sensors, MEMS-based accelerometers, load cells, tilt-meters, cabling, and connectors, and (9) network interface hardware. The reaction wall consists of concrete modules, hollow-core blocks designed to be mated at the top and bottom and postensioned into a monolithic unit. The same postensioning will be used to connect the reaction wall to the strong floor. At least 14 blocks will make it possible to configure a single 42-ft (12.8 m) reaction wall or two 21-ft (6.4 m) tall walls. Numerous combinations of walls and arrangements will be possible with this modular strong wall concept. A network interface will enable cooperative hybrid testing between an existing shaking table and the reaction wall. Furthermore, a network interface to the University of California Millennium cluster will provide access to a massively parallel computation facility necessary to implement the multiply substructured pseudo-dynamic testing method. The experimental facility is designed to support the development of a new generation of hybrid testing methods that smoothly integrate physical and numerical simulations. Portions of the structure, expected to behave in a predictable manner, are modeled numerically, while one or more complex subassemblies and the boundaries on which they interact are modeled using scaled physical models. Using numerical integration algorithms, the physical and numerical substructures can be analyzed as a single structure. The substructures, physical or numerical, involved in such hybrid testing can be at different geographic locations connected by the NEES network. UCB will integrate this reconfigurable reaction wall-based earthquake simulator into its research program and undergraduate and graduate curricula (including making the material widely available in online web-based course modules), and provide training opportunities for outside researchers through on-site courses and web-based materials.

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。这项合作协议根据NEES计划，在加州大学伯克利分校(UCB)建立了一个NEES可重构反应墙地震模拟器设施。UCB将设计、建造、安装、委托和运营一个模块化的高度灵活的动态测试设施，该设施将使形成单一结构的子结构之间的相互作用能够进行基于实验和分析模型的模拟。从这些模拟中获得的知识将有助于制定新一代以性能为基础的设计准则，并在实践中加以实施，以提高民用基础设施的安全性和可靠性。该设备将于2004年9月30日或更早投入使用，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。这个NEES设备站点将通过大学的Abilene连接连接到NEES协作室，具有1-2 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。该设备将安装在UCB里士满场站的484号楼，并将利用现有的坚固地板、现有的400万磅轴向压缩-拉伸试验机以及一系列现有的静态和动态执行器。本奖项提供下列设备：(1)带有后张力杆和联轴器的可重构反力墙，(2)7个动态和静态执行机构组件：4个动态执行机构组件，其中2个额定行程为50 Kps(222 KN)，行程最小为40英寸(1016 Mm)，2个额定行程为150 Kips(667 KN)，行程最小为40英寸(1016 Mm)；3个静态执行机构组件，1个额定行程为446/600 Kips(1984/2669 KN)，行程为40英寸(1016 Mm)，2个额定行程为216/328 Kips(961/1459 KN)，行程为72英寸(1829 Mm)，(3)一个液压分配系统，(4)一个高性能累积系统，(5)一个带有实时混合控制包和集成数据采集通道的数字控制系统，包括8个控制通道和16个附加数据采集通道的硬件和软件开发套件，(6)具有带A/D转换器的模块化128通道数据采集系统的先进数据采集系统，(7)包括数码相机、数字录像机和数字视频互联网服务器系统的数字视频远程观测系统，(8)包括基于电位计的位移传感器、基于MEMS的加速计、称重传感器、倾斜仪、布线和连接器，以及(9)网络接口硬件。反应墙由混凝土模块组成，空心砌块设计为在顶部和底部配对，并在柱子上形成一个整体。同样的后张法将用于将反力墙连接到坚固的地板上。至少14个区块将使配置一面42英尺(12.8米)的反作用力墙或两面21英尺(6.4米)高的墙成为可能。这种模块化的坚固的墙概念将使墙和布置的多种组合成为可能。网络接口将使现有的振动台和反应墙之间的合作混合测试成为可能。此外，加州大学千禧分校集群的网络接口将提供对实现多子结构伪动态测试方法所需的大规模并行计算设施的访问。该实验设施旨在支持新一代混合测试方法的开发，这些方法可以顺利地将物理和数值模拟结合在一起。预期将以可预测的方式工作的结构部分以数字方式建模，而一个或多个复杂部件及其相互作用的边界则使用缩放的物理模型进行建模。使用数值积分算法，可以将物理子结构和数值子结构作为单个结构进行分析。这种混合测试中涉及的物理或数值子结构可以位于通过NEES网络连接的不同地理位置。UCB将把这种可重新配置的基于反应墙的地震模拟器纳入其研究计划以及本科生和研究生课程(包括在在线网络课程模块中广泛提供材料)，并通过现场课程和网络材料为外部研究人员提供培训机会。