Seismic performance of a retrofitted heritage unreinforced masonry building during the 2010/2011 Canterbury earthquakes

2021 ◽  
pp. 875529302098802
Author(s):  
Aina Noor Misnon ◽  
Shannon Abeling ◽  
John Hare ◽  
Devina Shedde ◽  
Reza Jafarzadeh ◽  
...  
Keyword(s):  
New Zealand ◽  
Unreinforced Masonry ◽  
Seismic Retrofitting ◽  
Structural Systems ◽  
Masonry Building ◽  
Architectural Heritage ◽  
Total Cost ◽  
Earthquake Performance ◽  
Unreinforced Masonry Building ◽  
Building Demolition

The Heritage Hotel (formerly Old Government Buildings) is one of the architectural heritage icons of Christchurch, New Zealand. Seismic retrofitting was undertaken on the structure in 1995 to achieve the earthquake loading provisions of the 1992 standard for design loadings (NZS 4203:1992). This building is a distinguished 1909 unreinforced masonry Italian High Renaissance palazzo building. The retrofit work included the installation of new lateral load-resisting structural systems, refurbishment of individual building elements, and partial building demolition with a total cost of approximately NZ$3.75 million. Detailed observations following the 2010/2011 Canterbury earthquakes showed that the building was subject to only minor damage during the September 2010 earthquake, whereas the February 2011 event caused some damage to exterior stonework and flooding in the basement due to liquefaction. This damage was easily repaired, and the building was fully functional by September 2013. Reported herein are details showcasing the success of the seismic retrofit and post-earthquake performance observations.

Parapets, Politics, and Making a Difference: Lessons from Christchurch

2017 ◽  
Vol 33 (4) ◽  
pp. 1241-1255
Author(s):  
Ann Brower
Keyword(s):  
New Zealand ◽  
Bright Light ◽  
Unreinforced Masonry ◽  
Masonry Building ◽  
Dalai Lama ◽  
Main Street ◽  
Making A Difference ◽  
Remediation Time ◽  
Unreinforced Masonry Building

At 12:51 on 22 February 2011, 12 people died beside me. The parapet and facade of an unreinforced masonry building on the main street of Christchurch, New Zealand, crushed the bus that I was riding. I'm the only one left, the lucky 13th. My leg, my hand, and my soul will never be the same. I broke more bones than the surgeons were willing to count, spent two months in the hospital, and most of a year off work. I walked, slept, and dreamed in a fog for four years. It cost half a million dollars to save my left leg. I treasure that leg, scars and all, but still feel the earthquake in every step. In this opinion paper, I share my story—from the earthquake, to the Bright Light, to the Dark Place, to the hospital, to the Dalai Lama, to the halls of Parliament. I also share the story of a nation coming to grips with its home on the Ring of Fire. The story ends on 8 May 2016, when Parliament passed the new Building Act, complete with a ministerially titled “Brower Amendment” that halved the remediation time for unreinforced masonry parapets and other falling hazards. I conclude with the lessons I've learned on making a difference.

Analysis and seismic retrofitting of unreinforced masonry building: a case study

2021 ◽  
Author(s):  
Ishfaq Aziz ◽  
Raquib Ahsan ◽  
Md. Shadman Sakib ◽  
Shamontee Aziz ◽  
Md. Aminul Islam ◽  
...  
Keyword(s):  
Unreinforced Masonry ◽  
Seismic Retrofitting ◽  
Masonry Building ◽  
Unreinforced Masonry Building

scholarly journals Architectural Expression of Seismic Strengthening

2001 ◽  
Vol 17 (3) ◽  
pp. 417-426 ◽  
Author(s):  
Andrew Charleson ◽  
Julieanna Preston ◽  
Mark Taylor
Keyword(s):  
Structural Engineering ◽  
Seismic Retrofitting ◽  
Office Building ◽  
Masonry Building ◽  
Historic Buildings ◽  
Seismic Strengthening ◽  
Aesthetic Sense ◽  
Alternative Approach ◽  
The Subject ◽  
Unreinforced Masonry Building

Current seismic strengthening approaches to historic buildings place emphasis upon concealing engineering technologies. This study investigates, through a process of architectural and structural engineering design, the architectural possibilities inherent in a completely different approach. Recognizing both conservation concerns and the architectural qualities of two existing earthquake-prone buildings, the study explores seismic strengthening strategies that are exposed to view in order to contribute, in both a physical and aesthetic sense, a layer of architectural richness. A 1960s eight-story reinforced-concrete office building and a three-story unreinforced masonry building are the subject of theoretical seismic strengthening schemes. The paper describes the buildings, the strengthening approaches from both architectural and structural engineering perspectives, and comments on the outcome with respect to conservation guidelines. Although the proposed schemes challenge some sections of the guidelines, the authors believe the exposed structure enhances the existing architecture, and in so doing suggests an alternative approach for seismic retrofitting.

Seismic Assessment of Unreinforced Masonry Buildings

2016 ◽  
Vol 837 ◽  
pp. 16-21
Author(s):  
Jorge Arturo Avila-Haro ◽  
Ahmed Saad Elshoura ◽  
Jiří Maca
Keyword(s):  
Response Spectrum ◽  
Residential Building ◽  
Seismic Intensity ◽  
Unreinforced Masonry ◽  
Masonry Building ◽  
First Case ◽  
Non Linear ◽  
Unreinforced Masonry Building ◽  
Ground Motion Records

The first case study used in this work is an existing seven-storey unreinforced masonry building (representing a typical residential building located in the district of L ́Example in Barcelona). The accuracy of the non-linear static procedures was evaluated by comparison with non-linear dynamic analyses for seven ground motion records and different levels of seismic intensity. The results obtained from the analyses showed good performance of the static pushover methods on the analysed building. The second case study used in this work is a two-storey unreinforced masonry building which was tested at ELSA in Ispra, Italy. First a modal response spectrum analysis was carried out. Subsequently, non-linear static analysis was performed using two different computer programmes. The results of the present work were compared with experimental results.

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