Journal of Loss Prevention in the Process Industries ( IF 3.5 ) Pub Date : 2021-06-26 , DOI: 10.1016/j.jlp.2021.104576 F. Paolacci , G. Quinci , C. Nardin , V. Vezzari , A. Marino , M. Ciucci
The vulnerability of major-hazard industrial plants to natural hazards has been recognized as an emergent issue whose importance is underlined by the Sendai Framework, established immediately after the Tohoku earthquake of 2011, in Japan. Hence, seismic risk analysis is of paramount importance as testified by the intense research activity that characterized the last years. In this respect, structural health monitoring can represent a valuable tool able to strongly help the decision-making phase. Along this main vein, optical fibers (OFs) represent a class of sensors able to both monitor critical conditions, as leakage of hazardous material, and activate safety barriers, if any. More precisely, optical fibers represent an economic solution, whose characteristics appear particularly suitable for dangerous environments like major-hazard plants. However, investigations relevant to their use for seismic monitoring of chemical/petrochemical plants are rather limited, especially when subject to strong dynamic excitations. As a result, this paper deals with the analysis of optical fiber Bragg gratings (FBGs) applied to bolted flange joints (BFJ) under cyclic loadings. More precisely, two experimental programs, i.e., a cyclic test on a single BFJ and a series of shaking table tests on BFJs of a multicomponent system, demonstrated the effectiveness of the proposed monitoring systems in detecting hazardous conditions and, thus, their potential use in conjunction with safety barriers.
中文翻译:
在承受地震载荷的工业管道系统中配备 FBG 传感器的螺栓法兰接头
重大灾害工厂对自然灾害的脆弱性已被认为是一个紧急问题,其重要性在 2011 年日本东北地震后立即建立的仙台框架中得到了强调。因此,地震风险分析至关重要,正如过去几年的密集研究活动所证明的那样。在这方面,结构健康监测可以代表一种有价值的工具,能够有力地帮助决策阶段。沿着这条主要脉络,光纤 (OF) 代表了一类传感器,既能够监测危急情况(如危险材料的泄漏),又能够激活安全屏障(如果有)。更准确地说,光纤代表了一种经济的解决方案,其特性似乎特别适用于危险环境,如重灾区。然而,与它们用于化学/石化工厂地震监测相关的调查相当有限,尤其是在受到强动态激励时。因此,本文分析了在循环载荷下应用于螺栓法兰接头 (BFJ) 的光纤布拉格光栅 (FBG)。更准确地说,两个实验程序,即对单个 BFJ 的循环测试和对多组分系统的 BFJ 的一系列振动台测试,证明了所提出的监测系统在检测危险条件方面的有效性,因此,它们在以下方面的潜在用途与安全屏障相结合。本文涉及在循环载荷下应用于螺栓法兰接头 (BFJ) 的光纤布拉格光栅 (FBG) 的分析。更准确地说,两个实验程序,即对单个 BFJ 的循环测试和对多组分系统的 BFJ 的一系列振动台测试,证明了所提出的监测系统在检测危险条件方面的有效性,因此,它们在以下方面的潜在用途与安全屏障相结合。本文涉及在循环载荷下应用于螺栓法兰接头 (BFJ) 的光纤布拉格光栅 (FBG) 的分析。更准确地说,两个实验程序,即对单个 BFJ 的循环测试和对多组分系统的 BFJ 的一系列振动台测试,证明了所提出的监测系统在检测危险条件方面的有效性,因此,它们在以下方面的潜在用途与安全屏障相结合。