Developments in Seismic Instrumentation and Health Monitoring of Structures in New Zealand

Uma, S.R.; Beskhyroun, Sherif

doi:10.1007/978-3-030-13976-6_16

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…It is important to note modern and efficient networks for free-field seismic and structure monitoring in New Zealand, via the collaboration of GNS Science and Earthquake commission EQC [28], create the unique opportunity for this analysis challenging the reliability of current standards-based post-earthquake inspections. They also provide the framework within a larger effort to instrument critical buildings and infrastructure could be undertaken to improve New Zealand's seismic resiliency.…”

Section: Visual Inspection and Shm: Mission Impossible And An Urgent ...mentioning

confidence: 99%

“…However, only a few have had initiatives to instrument structures for SHM purposes. New Zealand is one of these rare countries, benefiting from an efficient and modernized ground motion monitoring network and a small-scale network of structures instrumented for SHM purposes, which all are defined and developed in the GeoNet project funded by the NZ Earthquake Commission (EQC) [28].…”

Section: Introductionmentioning

confidence: 99%

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Lessons from Earthquake-affected Structures: The Necessity of Structural Health Monitoring and Instrumentation

Rabiepour

Chase

Zhou

2022

Preprint

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This paper studies two highly earthquake-affected structures in New Zealand, where visual inspection outcomes missed damage, resulting in incorrect and delayed decisions, which cost lives and wasted resources. Specifically: 1) the un-instrumented Canterbury Television (CTV) building; and 2) the instrumented Bank of New Zealand (BNZ) building. This study uses these known outcomes to highlight the importance of reliable structural health monitoring (SHM) methods and SHM instrumentation in earthquake-prone areas, where each damaging earthquake and subsequent further-damaging aftershocks demand continuous monitoring to continuously assess damage and risk to safety. Elastic spectral analyses are carried out for the CTV building using the earthquake acceleration records at a station near the CTV building. For the BNZ building, inter-story drift ratio (IDR) analyses are conducted based on the building's instrumentation data. These simple, low-cost analyses indicate the damage and deterioration in both structures, and thus the importance of sensor networks and SHM instrumentation so quantitative analysis can rapidly examine subjective visual inspection results or better target and augment these inspections. Finally, this study introduces the hysteresis loop analysis (HLA) in the context of the instrumented BNZ building, showing the ability to provide necessary monitoring to assess damage and risk. This paper does not aim to criticize post-earthquake inspections or inspectors. However, it does aim to draw attention to the fact visual inspections are inherently unreliable, and current post-earthquake evaluation policies should be upgraded considering advances in instrumentation technologies and SHM methods. The paper ends discussing how the combined actions of all stakeholders are essential for successful, effective post-earthquake evaluations.

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Section: Visual Inspection and Shm: Mission Impossible And An Urgent ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lessons from Earthquake-affected Structures: The Necessity of Structural Health Monitoring and Instrumentation

Rabiepour

Chase

Zhou

2022

Preprint

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A spectral assessment for instant preliminary evaluation of structures after seismic events

Rabiepour,

Chase,

Zhou

2024

Earthquake Spectra

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This article introduces a simple, efficient spectral-based approach for rapid preliminary seismic assessment of earthquake-affected structures. Performance is validated using data from three highly earthquake-affected structures in New Zealand, where visual inspection with subjective outcomes missed damage, resulting in inaccurate and delayed decisions with significant social and economic losses. The three structures considered include (1) the instrumented Bank of New Zealand (BNZ) building; (2) the un-instrumented Queensgate Mall (QM) Complex; and (3) the un-instrumented Canterbury Television (CTV) building. This study uses these cases to highlight the importance of structural health monitoring (SHM) instrumentation and reliable quantified post-earthquake assessment methods in earthquake-prone areas, where each damaging earthquake and subsequent further-damaging aftershocks demand continuous monitoring to continuously assess damage and life safety risk. The simple, low-cost spectral analyses in this study clearly show the existence of damage and deterioration not fully discovered with standard visual inspection methods. This outcome highlights the importance of sensor networks and SHM instrumentation so quantitative, post-event analysis can rapidly augment and target further, more subjective visual inspection results.

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Developments in Seismic Instrumentation and Health Monitoring of Structures in New Zealand

Cited by 2 publications

References 19 publications

Lessons from Earthquake-affected Structures: The Necessity of Structural Health Monitoring and Instrumentation

Lessons from Earthquake-affected Structures: The Necessity of Structural Health Monitoring and Instrumentation

A spectral assessment for instant preliminary evaluation of structures after seismic events

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