Performance and Tracking of Nonstructural Systems in a Full-Scale Building

项目负责人：加州大学欧文分校土木与环境工程系Tara C. Hutchinson和加州大学欧文分校电气工程与计算机科学系Falko Kuester申请探索性研究（SGER）小额资助，旨在利用一个独特的机会研究全尺寸建筑结构中组装的非结构系统的响应。拟议的调查有两个主要目标：(1)描述一类重要设备和建筑内容的地震反应特征；(2)研究使用基于图像的监测系统阵列跟踪这些设备和内容的反应的适用性。要求SGER提供资源，为建筑物内部的一些房间配备非结构设备和相机阵列，以评估这两个系统的性能。我们希望在此issger下进行的工作将证明这一想法在全尺寸建筑结构中的适用性，并确定在该过程的图像采集和分析部分进行进一步研究所需的领域。因此，从拟议的现场实验中收集的数据对于使用NEES设备研究替代计算机视觉和运动跟踪算法以推进基于相机的系统作为地震监测技术的更大提案的发展至关重要。感兴趣的建筑是一座四层建筑，位于北塞普尔韦达大道4827号。加州ShermanOaks（距离加州大学欧文分校约80公里）。该建筑在1994年的北岭地震中严重受损，自这次地震以来一直没有被占用。通过NSF提供的单独资金，John Wallace教授将使用UCLA NEES移动设备单元对该结构进行现场振动实验。计划的振动实验包括在建筑物的屋顶上放置一对直线和偏心质量激振器，并在两个正交方向上驱动结构。此外，一对激振器将用于将扭转运动施加到结构中。虽然重点放在研究该建筑的结构响应上，但该实地项目也提供了一个独特的机会来研究安装在结构内部的元件的响应。

PI's: Tara C. Hutchinson, Dept. of Civil and Environmental Engineering, University of California, Irvine and Falko Kuester, Dept. of Electrical Engineering and Computer Science, University of California, IrvineThis small grant for exploratory research (SGER) is requested to take advantage of a unique opportunity tostudy the response of nonstructural systems assembled within a full-scale building structure. The proposed investigation has two primary objectives: (1) to characterize the seismic response of an important class of equipment and building contents and (2) to study the applicability of tracking the response of these rquipment and contents using arrays of image-based monitoring systems. An SGER is requested to providethe resources to outfit a number of rooms within the interior of the building with nonstructural equipmentand camera arrays to assess performance of both of these systems. We hope the work conducted under thisSGER will demonstrate the applicability of this idea for use in full-scale building structures and identify needed areas for further study in the image acquisition and analysis portion of the process. As such, datacollected from the proposed field experiments will be critical for the development of a larger proposal using NEES equipment to investigate alternative computer vision and motion tracking algorithms to advance camera-based systems as an earthquake monitoring technology.The building of interest is a four-story building located at 4827 North Sepulveda Blvd., ShermanOaks, California (approximately 80 km from the UC Irvine campus). The building was damaged significantly during the 1994 Northridge earthquake and has not been occupied since this event. Through separate funding provided by NSF, Professor John Wallace will use the UCLA NEES Mobile Equipment Unit to conduct field vibration experiments on this structure. Planned vibration experiments include placing pairs of linear and eccentric mass shakers on the roof of the building and driving the structure in the two orthogonal directions. In addition, a pair of shakers will be used to impose torsional motions into the structure. While much emphasis is placed on studying the structural response of this building, this field project provides a unique opportunity to study the response of elements mounted inside of the structure as well.