Constituent material properties of New Zealand unreinforced stone masonry buildings

Giaretton, Marta; Dizhur, Dmytro; Porto, Francesca da; Ingham, Jason

doi:10.1016/j.jobe.2015.08.005

Cited by 26 publications

(8 citation statements)

References 5 publications

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“…Bear that, although the values used for the masonry refer to the equivalent homogeneous material, a unit-cell homogenized strategy was not employed. Instead, information provided by the NZ authorities and from literature [45], such as the Young's modulus and compressive strength of masonry units and reinforced concrete, was considered in the preparation of the numerical model. For the inelastic parameters, the recommendations in the literature were adopted [46], [47].…”

Section: Materials Propertiesmentioning

confidence: 99%

Seismic Structural Assessment of the Christchurch Catholic Basilica, New Zealand

et al. 2018

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An evaluation of the seismic performance of the Christchurch Catholic Basilica, New Zealand, also known as the Cathedral of the Blessed Sacrament, is presented. The cultural importance of the Basilica has been recognized, as it is listed as a Category I building on the New Zealand heritage register. Four strong earthquakes that occurred between September 2010 and June 2011 caused progressive damage and local collapse in the Basilica. Numerical analyses were performed to allow a seismic assessment of the Basilica using the Finite Element Method. A macro-modelling approach following homogenization concepts was considered and the seismic behaviour of the structure was evaluated through pushover analysis with the distribution of forces being proportional to the mass. The analyses allowed damage patterns and capacity curves to be determined, and identified the most vulnerable elements, the maximum load capacity, and the expected collapse mechanisms. Furthermore, a comparison between the numerical output and the existing crack patterns was undertaken, and good agreement was obtained. Finally, two strengthening techniques were evaluated with the aim of reducing the seismic vulnerability of the structure by avoiding collapse of the most vulnerable structural elements.

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Section: Materials Propertiesmentioning

confidence: 99%

Seismic Structural Assessment of the Christchurch Catholic Basilica, New Zealand

et al. 2018

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“…The conservation of heritage buildings and their association with appropriate structural protection principles is a historical, cultural, and engineering process that requires a multidisciplinary and multicultural approach [2][3][4]. Preserving the heritage built in developed societies and transferring it to future generations is very important to consolidate a collective memory that creates a sense of belonging for citizens and access to cultural heritage [5][6][7]. Efforts are needed to ensure the sustainable improvement and preservation of cultural resources for future generations [8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Base-Isolator System’s Effects on the Seismic Behavior of a Historical Structure

Usta

2021

Buildings

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The earthquake performance of structures with seismic isolation is much better than that of fixed-base structures, and the application of seismic insulation ensures both structural integrity and the protection of the items present in the structures. The base-isolation system is used to extend the fundamental period of vibration of the structure and to obtain higher value from base-isolated structures relative to the fixed-base structure. Historical masonry mosques could be strengthened using a base-isolation technique. In this study, a historical masonry mosque was organized and modelled using SAP2000 software. Nonlinear Time History analyses were carried out for the historical masonry structure, firstly for the fixed-base mosque and secondly for the base-isolated mosque with lead rubber bearing (LRB). The use of a base-isolator system caused an increase in the historical mosque’s period, reducing the displacements, acceleration, and force applied on the mosque and the resulting structural deformation; the results of the analysis indicate a significant improvement in the seismic behavior. The modelling results show that such historical masonry buildings (especially those with high and delicate minarets) can be vulnerable to major earthquakes, and it may be useful to examine strengthening strategies for these buildings.

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“…Structural mortar was founded to be relatively weak, with a compressive strength ranging between 0.2 MPa and 3.5 MPa and being either lime or cement-based. Extensive characterisation of material properties have been reported in Lumantarna et al (2014) and Giaretton et al (2015). Height < 500 mm Height 500 to 1,000 mm Height > 1,000 mm 57% (329) 24% ( 138) 19% (108) Parapets located in two story buildings 58% (557) Height < 500 mm Height 500 to 1,000 mm Height > 1,000 mm 67% ( 374) 18% ( 102) 15% ( 81)…”

Section: Urm Parapet Cross Section Arrangementsmentioning

confidence: 99%

Section: Prevalence Of Masonry Parapets In Christchurchmentioning

confidence: 99%

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Post-Earthquake Reconnaissance of Unreinforced and Retrofitted Masonry Parapets

et al. 2016

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Unrestrained unreinforced clay brick masonry (URM) parapets are freestanding wall elements found atop a large number of vintage URM buildings. Parapets are considered to be one of the most vulnerable nonstructural components that are prone to out-of-plane collapse when subjected to earthquake induced shaking. Using data collected during the earthquake reconnaissance efforts, 959 URM parapets were identify to be in existence in the Christchurch (New Zealand) area prior to 2010, with 60% (580) of them having collapsed during the 2010/2011 Canterbury earthquake sequence. Construction details and observed performance of both as-built and retrofitted parapets were documented. The reported study provides an inventory of observed parapet failure modes and a critical review of commonly encountered parapet retrofits and their respective seismic performance

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Constituent material properties of New Zealand unreinforced stone masonry buildings

Cited by 26 publications

References 5 publications

Seismic Structural Assessment of the Christchurch Catholic Basilica, New Zealand

Seismic Structural Assessment of the Christchurch Catholic Basilica, New Zealand

Investigation of a Base-Isolator System’s Effects on the Seismic Behavior of a Historical Structure

Post-Earthquake Reconnaissance of Unreinforced and Retrofitted Masonry Parapets

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