Raspberry Shake-Based Rapid Structural Identification of Existing Buildings Subject to Earthquake Ground Motion: The Case Study of Bucharest

Abstract

The Internet of things concept empowered by low-cost sensor technologies and headless computers has upscaled the applicability of vibration monitoring systems in recent years. Raspberry Shake devices are among those systems, constituting a crowdsourcing framework and forming a worldwide seismic network of over a thousand nodes. While Raspberry Shake devices have been proven to densify seismograph arrays efficiently, their potential for structural health monitoring (SHM) is still unknown and is open to discovery. This paper presents recent findings from existing buildings located in Bucharest (Romania) equipped with Raspberry Shake 4D (RS4D) devices, whose signal recorded under multiple seismic events has been analyzed using different modal identification algorithms. The obtained results show that RS4D modules can capture the building vibration behavior despite the short-duration and low-amplitude excitation sources. Based on 15 RS4D device readings from five different multistorey buildings, the results do not indicate damage in terms of modal frequency decay. The findings of this research propose a baseline for future seismic events that can track the changes in vibration characteristics as a consequence of future strong earthquakes. In summary, this research presents multi-device, multi-testbed, and multi-algorithm evidence on the feasibility of RS4D modules as SHM instruments, which are yet to be explored in earthquake engineering.

Evaluation of Seismic Response on Small-Scale Reinforced Concrete Frame Using Small-Scale Low-Cost Equipment’s

“…Based on the numerical test results for shake table testing under 60 Hz frequency, it was observed that the vibrations were found lower at bottom storey as compared to top storey. Similar results were also observed by previous works [15,16]. The peak positive acceleration was found to be 4.72, 3.03 and 1.93 g at 3 rd , 2 nd and 1 st floor respectively.…”

“…Low-cost micromechanical systems (MEMS) system has been widely used for structural and geotechnical applications [12][13][14][15][16][17][18][19]. Choudhry B.S.…”

Design and Implementation of a Wireless Recorder System for Seismic Noise Array Measurements

“…All this, together with the growing development of microcontrollers and open-source electronic platforms, has led to the development of ad hoc seismic recorders by some researchers. Many of them are focused on the measurements of a vertical sensor, e.g., [ 22 , 23 ], the measurements of three components for subsequent H/V analysis, e.g., [ 24 , 25 , 26 ], geophysical exploration, e.g., [ 27 , 28 ], seismic monitoring in buildings, e.g., [ 29 , 30 , 31 ], etc.…”

Lab and Field Tests of a Low‐Cost 3‐Component Seismometer for Shallow Passive Seismic Applications

“…In this work we present our study regarding lab and field testing of a low-cost 3C seismometer that could foster the development of shallow passive seismic applications. Recently, this unit, or similar ones produced by the same manufacturer, have been employed for different aims, including studying global quieting of seismic noise during COVID-19 pandemic lockdown (Lecocq et al, 2020), densification of seismic networks with the so-called citizen Seismology (Calais et al, 2022;Walter et al, 2019), monitoring of rockfalls (Manconi et al, 2018), induced seismicity (Hicks et al, 2019), icequakes (Winter et al, 2021) and structural health (Alarcón et al, 2023;Özcebe et al, 2022). Anthony et al (2019) have analyzed the performance of a seismic station similar to the one considered here, though addressing seismological applications.…”