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Low-velocity out-of-plane impact tests on double-wythe unreinforced brick masonry walls instrumented with optical measurements
RISE Research Institutes of Sweden, Material och produktion, Kemi och Tillämpad mekanik.ORCID-id: 0000-0002-9586-8667
RISE Research Institutes of Sweden, Material och produktion, Kemi och Tillämpad mekanik.ORCID-id: 0000-0002-3481-1368
RISE Research Institutes of Sweden, Säkerhet och transport, Brand och Säkerhet.ORCID-id: 0000-0002-0033-1841
2023 (Engelska)Ingår i: International Journal of Impact Engineering, ISSN 0734-743X, E-ISSN 1879-3509, Vol. 178, artikel-id 104597Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Unreinforced brick masonry makes up today a significant piece of the European built environment, including not only residential buildings but also strategically important structures that are not designed to withstand blasts and impacts. Yet, it is difficult to accurately estimate the response of these structures and the extent of damage they sustain during such extreme loading conditions. This paper presents the implementation and discusses the results of laboratory impact tests conducted on natural-scale double-wythe unreinforced brick masonry walls, a typology that is frequently found in Northern Europe. The walls were spanning vertically between two reinforced concrete slabs and were subjected to low-velocity drop-weight pendulum tests in which they were repeatedly hit until the opening of a breach in the center of the wall. The tests were instrumented with both hard-wired and optical measurements, the latter consisting of high-speed cameras and digital image correlation techniques, to face the difficulty of observing cracks and determining the deflections of the walls with adequate accuracy at the time of the impact. Investigated in these tests were the out-of-plane response of the walls and their capacity to resist the impacts. The axial load applied on the top of the walls was varied for two wall configurations and monitored throughout the tests to study the effect of arching on the failure mechanism produced and number of repeated hits needed to open the breach. Of interest was also the evidence of cracking, more specifically the way it initiated on the undamaged walls and next propagated upon consecutive hits. The data generated from these tests are made available to support further investigations on unreinforced masonry structures subjected to extreme actions.

Ort, förlag, år, upplaga, sidor
2023. Vol. 178, artikel-id 104597
Nyckelord [en]
Impacts, Masonry, Out-of-plane, Arching, Digital Image Correlation (DIC), High-speed cameras
Nationell ämneskategori
Infrastrukturteknik
Identifikatorer
URN: urn:nbn:se:ri:diva-64282DOI: 10.1016/j.ijimpeng.2023.104597OAI: oai:DiVA.org:ri-64282DiVA, id: diva2:1749308
Anmärkning

This study was funded by the ÅForsk Foundation, through the ‘Young researcher’ granting scheme, grant agreement n. 20-335.

Tillgänglig från: 2023-04-06 Skapad: 2023-04-06 Senast uppdaterad: 2024-05-27Bibliografiskt granskad

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Godio, MicheleFlansbjer, MathiasWilliams Portal, Natalie

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