Large Displacement Soil-Structure Interaction Facility for Lifeline Systems

[02173666]乔治·布朗地震工程模拟台网（NEES）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。该合作协议在NEES下建立了一个NEES合作设施，用于生命线系统中大位移土-结构相互作用的先进实验研究。康奈尔大学与伦斯勒理工学院（RPI）合作，将开发先进的实验设备，在离心机规模和全尺寸上模拟关键生命线设施中土壤-结构-基础相互作用（SFSI）的测试、评估和分析能力。全尺寸测试通常是昂贵和耗时的，因此将使用辅助离心机实验模型和分析/数值模拟来扩大测试范围，以及在全尺寸测试之前调查参数敏感性并确定可能的不可预见的影响。该奖项是对项目招标NSF-01-164“NEES地震工程研究设备，第二阶段”提交的提案进行同行评审的结果。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，包括a)一个190升/分钟（lpm）的液压分配系统，3站液压服务歧管和3个1站歧管，每个都有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致动器，载荷能力为295千牛至500千牛，行程为+/- 0.91米；d)一个大行程液压结构致动器，载荷能力为445千牛，压缩650千牛，行程为+/- 64米；e)一个222lpm， 21MPa液压泵；f)用于生命线改造和设计中先进复合材料的循环测试的摩擦夹具。此外，将在康奈尔大学设计、建造和安装模块化反应墙，以容纳用于桥梁结构中使用的增强复合胶凝材料的大型物理模型的执行器。康奈尔大学的其他支持设备包括一个网络数据采集系统，该系统将与NEES数据网络相连。还将安装摄像机和操作系统，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允许模拟大直径和小直径管道离心机模型的大地面位移，拉动弯头等。此外，将与现有RPI飞行振动筛（该振动筛由单独的NEES授予RPI）一起使用的特殊容器将研究：a)土壤液化过程中对管道的抬升力的影响，b)由于液化引起的横向扩散对管道的侧向力，以及c)由于边坡破坏造成的管道损坏。康奈尔大学和RPI的设备将在2004年或更早的时候投入使用，并将作为一个国家共享使用的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网络连接到NEES网络系统。共享使用的获取和培训将通过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项目中，并在K-12阶段促进对地震工程和模拟的额外兴趣。

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.