FBG based strain monitoring in the rehabilitation of a centenary metallic bridge
FBG based strain monitoring in the rehabilitation of a centenary metallic bridge
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DOI：
10.1016/j.engstruct.2012.05.040
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发表时间：
2012-11-01
影响因子：
5.5
通讯作者：
Figueiras, Joaquim
中科院分区：
文献类型：
--
作者：
Rodrigues, Carlos;Cavadas, Filipe;Figueiras, Joaquim
结构修复在土木工程中发挥着越来越重要的作用，因为大量现有的基础设施需要紧急干预，以保持足够的舒适度和安全性。然而，设计这些修复过程是一项非常复杂的任务，因为它涉及到初始结构条件的分析和安全验证。建筑过程也非常复杂，在执行过程中需要不断评估，以保持其有效性，并且不干扰原始结构系统。在这方面，经常出现许多关于结构性修复的不同问题的疑问。永久或短期的结构监测已被证明具有独特的潜力，在寻找答案，这些疑问，使评估的初始结构条件和修复的有效性。本文提出了一种监测钢桥应变的方法，使用光纤布拉格光栅传感器，以评估在最相关的结构修复阶段的结构行为。对位于葡萄牙北方的一座双层百年金属桥--艾菲尔桥进行了全面的监测，该桥最近得到了修复，说明了这种方法的应用。详细介绍了该桥结构监测的目的和作用。大多数相关的结果被用来说明的贡献，光纤光栅应变监测施加在这个显着的例子19世纪的工程恢复过程。(C)2012爱思唯尔有限公司保留所有权利。
Structural rehabilitation plays an increasingly important role in civil engineering, due to the large number of existing infra-structures needing urgent interventions to maintain an adequate level of comfort and safety. However, designing these rehabilitation processes is a highly complex task, since it involves the analysis of the initial structural condition and the safety verification. The building processes are also highly complex, requiring constant assessment during their execution to keep it effective and to not disturb the original structural system. In this context, many doubts frequently emerge regarding the different matters concerning a structural rehabilitation. Permanent or short-term structural monitoring has shown to have a unique potential in the search for answers to these doubts, enabling the assessment of both the initial structural condition and the effectiveness of the rehabilitation. This paper presents an approach for monitoring strains in steel bridges, using fiber Bragg grating sensors, in order to assess the structural behavior during the most relevant stages of a structural rehabilitation. The comprehensive monitoring program carried out on Eiffel Bridge, a double-decked centenary metallic bridge located in Northern Portugal, which was recently rehabilitated, illustrates the application of this approach. The goals and the usefulness of the structural monitoring applied to this bridge are described in detail. Most relevant results are used to illustrate the contributions that FBG based strain monitoring exerted on the rehabilitation process of this remarkable example of 19th century engineering. (C) 2012 Elsevier Ltd. All rights reserved.