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Scaffolding Modelling for Real-Time Monitoring using a Strain Sensing Approach

机译：使用应变感测方法进行实时监测脚手架建模

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Scaffolding structures are important as a temporary structural element that are used to support workers, equipment, and materials during construction activities. Although 65% of construction workers work on scaffolding structures and often are exposed to safety hazards, the current method of monitoring scaffold structures still is premature. As an example of practices set by the U.S. Occupational Safety and Health Administration, a knowledgeable and experienced individual conducts a visual and labor-intensive inspection. However, one difficulty in conducting structural analysis of a scaffolding structure involves its boundary conditions and material design parameters, which vary depending upon loading conditions. This research explored a new method to accurately model the boundary conditions and design parameters of a scaffolding structure in real time by using wireless strain sensors. An Internet of Things (IoT) open-source Arduino module was used to develop wireless strain sensors to acquire strain data directly from a scaffolding structure. The strain data were transmitted to a finite element method (FEM) model, which was used to estimate the real-time structural behavior of a scaffold. A model-updating technique was used to improve the synchronizing accuracy between the FEM model (i.e., the cyber model) and the actual scaffold. The test results indicated that the proposed synchronizing method described the real-time structural behavior of the scaffold accurately, especially for modelling the boundary conditions and design parameters. The outcomes of this paper are expected to foster the use of wireless sensing technology for safety monitoring of temporary structures and to offer the potential of improving construction safety by preventing the collapse of temporary structures.
机译：脚手架结构作为临时结构元件很重要，用于支撑施工活动期间的工人，设备和材料。虽然65％的建筑工人在脚手架结构上工作，但经常暴露在安全危险中，目前的监测脚手架结构的方法仍在过早。作为美国职业安全和健康管理局设定的实践的例子，知识渊博和经验丰富的个人进行视觉和劳动密集型检查。然而，对脚手架结构进行结构分析的一个难度涉及其边界条件和材料设计参数，其根据装载条件而变化。本研究探讨了一种新方法，可以通过使用无线应变传感器在实时模拟脚手架结构的边界条件和设计参数。用于开放源Arduino模块的内容互联网（IOT）开发无线应变传感器以直接从脚手架结构获取应变数据。将应变数据传输到有限元方法（FEM）模型，用于估计支架的实时结构行为。模型更新技术用于提高有限元模型（即网络模型）与实际脚手架之间的同步精度。测试结果表明，所提出的同步方法精确地描述了支架的实时结构行为，尤其是用于建模边界条件和设计参数。预计本文的成果将促进使用无线传感技术来安全监测临时结构，并通过防止临时结构崩溃来提高建筑安全性的潜力。

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