Expanding the Field Capabilities of the NEES@UTexas Equipment Site

该奖项为德克萨斯大学奥斯汀分校（UTA）提供资金，用于升级乔治·e·布朗地震工程模拟网络（NEES）大型移动振动台和相关仪器的实验能力，用于岩土工程和结构系统现场的动态场研究，该网络将由NEES财团公司运营，在2005 - 2014财年期间作为国家共享使用设施。UTA NEES现场的主要设备包括：(1)三个具有不同力和频率能力的移动式振动筛，以及一个牵引式拖车钻机，用于将两个最大的振动筛从现场移动到现场；(2)一辆仪表车，装有最先进的数据采集系统和卫星连接；(3)大量现场仪器，包括测量振动运动和孔隙水压力的有线和无线传感器。根据该合同，将为该基地购买以下设备：两个可移动锥形穿透测试（CPT）圆柱体；CPT计算机控制单元；三个CPT锥尖，GPS， 30个三轴MEMS加速度计，10个孔隙压力传感器以及相关电缆和连接器。可移动钢瓶将使卡车定位在离现场最近的位置，并允许卡车在两个水平方向上自由移动，以方便液化传感器的插入和提取。仪器锥形穿透测试设备使研究土壤液化的现场勘探具有成本效益。液化传感器包括三个锥尖，和一个计算机控制单元将实现这一功能。现场GPS将允许现场人员精确定位设备和传感器的位置。该功能使用户能够通过GPS标记记录点的附加信息。MEMS加速度计以及传感器可以在低于10Hz的频率下进行现场液化测试。这种升级后的设备将显著扩大和提高该NEES站点的现场测试能力。该设备将通过NEES Consortium， Inc.， UTA NEES设施提供给地震工程研究界。该奖项由NSF NEES主要研究设备和设施建设（MREFC）项目资助，是国家减少地震灾害计划（NEHRP）的一个组成部分。

This award provides funding to the University of Texas - Austin (UTA), to upgrade the experimental capabilities of the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Large-Scale Mobile Shakers and associated instrumentation for the Dynamic Field Studies of Geotechnical and Structural Systems site that will be operated by NEES Consortium, Inc., as a national shared use facility during FY 2005 - FY 2014. The major equipment at the UTA NEES site includes: (1) three mobile shakers that have diverse force and frequency capabilities and a tractor-trailer rig to move the two largest shakers to and from field sites, (2) an instrumentation van that houses state-of-the-art data acquisition systems and a satellite link-up, and (3) a large collection of field instrumentation that includes wired and wireless sensors that measure vibrational motion and pore water pressure. Under this award, the following equipment will be purchased for this site: two moveable Cone Penetration Test (CPT) cylinders; CPT computer control unit; and three CPT cone tips, GPS, 30 Tri-axial MEMS accelerometers, 10 pore pressure transducers and related cables and connectors. The moveable cylinders will allow positioning the truck closest to the site and allow the freedom of movement of the truck in both horizontal directions to facilitate the insertion and extraction of liquefaction sensors. Instrumented cone penetration test equipment allows cost -effective site exploration in studying soil liquefaction. Liquefaction sensors including a three cone tips, and a computer control unit will enable this function. The field GPS will allow field personnel to pinpoint the location of equipment and sensors. This functionality enables the user to tag the recorded points with additional information through GPS. MEMS accelerometers along with the transducers enable in-situ liquefaction tests at frequencies less than 10Hz. This upgraded equipment will significantly expand and improve the field- testing capabilities at this NEES site. This equipment will be available to the earthquake engineering research community through the NEES Consortium, Inc., UTA NEES facility. This award is funded by the NSF NEES Major Research Equipment and Facilities Construction (MREFC) project and is a component of the National Earthquake Hazards Reduction Program (NEHRP).