Large Displacement Soil-Structure Interaction Facility for Lifeline Systems

The George E.Brown，Jr.地震工程模拟网络(NEES)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，NEES建立了一个NEES合作设施，用于生命线系统中大位移土-结构相互作用的高级实验研究。康奈尔大学将与伦斯勒理工学院(RPI)合作，开发先进的实验设施，在离心机规模和全尺寸范围内模拟关键生命线设施中土-结构-基础相互作用(SFSI)的测试、评估和分析能力。全面测试通常是昂贵和耗时的，因此将使用补充的离心机实验模型和分析/数值模拟来扩大测试范围，并在全面测试之前调查参数敏感性和确定可能的不可预见的影响。该奖项是提交给项目征集NSF-01-164“NEES地震工程研究设备，第二阶段”的建议的同行评审的结果。位于康奈尔的设备将包括升级现有的伺服液压系统，用于大型岩土和生命线系统的结构测试，并包括a)一个液压分配系统，具有一个190升/分钟(LPM)、3个液压服务歧管和3个1个1站歧管，每个具有115伏控制和1升蓄能器，b)电子控制系统和控制器，c)两个大行程液压结构执行器，负载能力从295kN张力到500kN张力，行程+/-0.91m，d)一个大行程液压结构执行器，负载能力为445kN拉伸650 kN压缩，行程+/-米，E)一个227 LPM、21 Mpa的液压泵，以及f)用于生命线改造和设计中使用的先进复合材料的循环测试的摩擦把手。此外，康奈尔大学将设计、建造和安装一个模块化反应墙，以容纳桥梁结构中使用的增强复合胶凝材料的大型物理模型所使用的执行器。康奈尔大学的其他支持设备包括一个联网的数据采集系统，该系统将连接到NEES数据网络。还将安装摄像机和操作系统，以直接支持远程参与能力。RPI的新设备包括两个先进的大型分离式离心机箱，用于纵向和横向运动。这两个新的先进容器可以对大直径和小直径管道离心机模型的地面大位移进行建模，还可以使用弯头拉力等。此外，将与现有的RPI动态振动筛(该振动筛是由RPI获得的另一项NEES奖项提供的)一起使用的特殊容器(S)将研究：a)土壤液化期间上托力对管道的影响；b)液化引起的横向扩展对管道的侧向力；c)斜坡破坏造成的管道损伤。康奈尔大学和RPI的设备将在2004年或更早的时候投入使用，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，以提供到2014年的新的地震工程研究测试能力。该NEES设备站点将通过高性能网络连接到NEES网络系统。共享使用准入和培训将通过NEES联盟进行协调。康奈尔大学和RPI都将把测试设备整合到本科生和研究生的研究和推广计划中，并在K-12级别促进对地震工程和模拟的更多兴趣。

ABSTRACT0217366StewartThe George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) is a project funded under the NSF Major Research Equipment and Facilities Construction appropriation. This cooperative agreement, under NEES, establishes a NEES collaborative facility for advanced experimental investigations for large displacement soil-structure interactions in lifeline systems. Cornell, in partnership with Rensselaer Polytechnic Institute (RPI), will develop advanced experimental facilities to simulate, at both centrifuge-scale and full-scale, capabilities for testing, evaluation, and analysis of soil-structure-foundation interaction (SFSI) in critical lifeline facilities. Full-scale testing usually is expensive and time consuming so supplementary centrifuge experimental models and analytical/numerical simulations will be used to expand the scope of the testing, as well as to investigate parameter sensitivity and identify possible unforeseen effects prior to full-scale tests. 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." Equipment located at Cornell will consist of upgrading the existing servo-hydraulic system for large geotechnical and structural testing of lifeline systems, and includes a) a hydraulic distribution system with one 190 liter/min (lpm), 3-station hydraulic service manifold and three 1-station manifolds, each with 115 volt controls and 1 liter accumulator, b) electronic control systems and controllers, c) two large stroke hydraulic structural actuators with load capacities of 295 kN tension to 500 kN tension with strokes of +/- 0.91m, d) one large stroke hydraulic structural actuator with load capacities of 445 kN tension 650 kN compression with a stroke of +/- 64 m, e) one 227 lpm, 21MPa hydraulic pump, and f) friction grips for use in cyclic testing of advanced composites used in lifeline retrofit and design. In addition, a modular reaction wall will be designed, constructed, and installed at Cornell to accommodate the actuators used for large-scale physical models of reinforced composite cementitious materials used in bridge structures. Other support equipment at Cornell consists of a networked data acquisition system that will be tied in to the NEES data network. Video cameras and operational systems also will be installed for direct support of teleparticipation capabilities. New equipment at RPI consists of two advanced large split centrifuge boxes for longitudinal and transverse movements. These two new advanced containers allow for modeling large ground displacement of both large- and small-diameter pipeline centrifuge models, pulling on an elbow, etc. In addition, special container(s) to be used with existing RPI in-flight shaker (the shaker is provided under a separate NEES award to RPI) will study: a) the effect of uplift forces on pipelines during soil liquefaction, b) lateral forces on pipelines due to liquefaction induced lateral spreading, and c) pipeline damage due to slope failure. The equipment at Cornell and RPI 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 through 2014. This NEES equipment site will be connected to the NEES network system through a high performance network. Shared-use access and training will be coordinated through the NEES Consortium. Both Cornell and RPI will integrate the testing equipment into research and outreach programs at the undergraduate and graduates levels, as well as promote additional interest in earthquake engineering and simulation at the K-12 levels.