Ageing civil infrastructure systems require imminent attention before any failure mechanism becomes critical. Structural Health Monitoring (SHM) is employed to track inputs and/or responses of structural systems for decision support. Inspections and structural health monitoring require field visits, and subsequently expert assessment of critical elements at site, which may be both time-consuming and costly. Also, fieldwork including visits and inspections may pose danger, require personal protective equipment and structure closures during the fieldwork. To address some of these issues, a Virtual Reality (VR) collaborative application is developed to bring the structure and SHM data from the field to the office such that many experts from different places can simultaneously virtually visit the bridge structure for final assessment. In this work, we present an SHM system in a VR environment that includes the technical and visual information necessary for the engineers to make decisions for a footbridge on the campus of the University of Central Florida. In this VR application, for the visualization stage, UAV (Unmanned Air Vehicle) photogrammetry and LiDAR (Light Detection and Ranging) methods are used to capture the bridge. For the technical assessment stage, Finite Element Analysis (FEA) and Operational Modal Analysis (OMA) from vibration data as part of SHM are analyzed. To better visualize the dynamic response of the structure, the operational behaviour from the FEA is reflected on the LiDAR point cloud model for immersive. The multi-user feature allowing teams to collaborate simultaneously is essential for decision-making activities. In conclusion, the proposed VR environment offers the potential to provide beneficial features with further automated and real-time improvements along with the SHM and FEA models.
翻译:结构性健康监测(SHM)用于跟踪用于决策支持的结构性系统的投入和/或反应; 检查和结构性健康监测需要实地访问,然后对现场关键要素进行专家评估,这些要素可能既耗时又费钱; 此外,实地工作,包括访问和视察,可能带来危险,需要在实地工作期间进行个人保护设备和结构关闭; 为了解决这些问题,开发了一个虚拟现实(VR)协作应用程序,将结构和SHM数据从外地带到办公室,以便来自不同地点的许多专家能够同时访问最终评估的桥梁结构; 在这项工作中,我们在VR环境中提出SHM系统,其中包括工程师为中佛罗里达大学校园的足桥作决定所必需的技术和视觉信息; 在VR应用中,需要个人保护设备和结构在实地工作期间关闭; 为了解决其中一些问题,开发了一个虚拟现实现实数据(VR)模型和LIDAR(Light Sharing) 改进了实地工作,使来自不同地点的许多专家可以同时访问最终评估的桥梁结构。 在技术评估阶段,FELELERE 分析(FA) 和操作分析(FA) 模拟分析中反映实际环境反应的模型和操作分析(FAA) 提供FAA) 和FA 的模拟分析,从FA 进行更动分析。