Search

found 163 results

Images for masonry; more images...

Research papers, The University of Auckland Library

This thesis describes the strategies for earthquake strengthening vintage clay bricks unreinforced masonry (URM) buildings. URM buildings are well known to be vulnerable to damage from earthquake-induced lateral forces that may result in partial or full building collapse. The 2010/2011 Canterbury earthquakes are the most recent destructive natural disaster that resulted in the deaths of 185 people. The earthquake events had drawn people’s attention when URM failure and collapse caused about 39 of the fatality. Despite the poor performance of URM buildings during the 2010/2011 Canterbury earthquakes, a number of successful case study buildings were identified and their details research in-depth. In order to discover the successful seismic retrofitting techniques, two case studies of retrofitted historical buildings located in Christchurch, New Zealand i.e. Orion’s URM substations and an iconic Heritage Hotel (aka Old Government Building) was conducted by investigating and evaluating the earthquake performance of the seismic retrofitting technique applied on the buildings prior to the 2010/2011 Canterbury earthquakes and their performance after the earthquakes sequence. The second part of the research reported in this thesis was directed with the primary aim of developing a cost-effective seismic retrofitting technique with minimal interference to the vintage clay-bricks URM buildings. Two retrofitting techniques, (i) near-surface mounted steel wire rope (NSM-SWR) with further investigation on URM wallettes to get deeper understanding the URM in-plane behaviour, and (ii) FRP anchor are reported in this research thesis.

Images, UC QuakeStudies

A photograph of the earthquake damage to the Canterbury Provincial Chambers. The top section of the building has crumbled, the masonry spilling onto the footpath. Wire fencing has been placed around the building as a cordon.

Research papers, The University of Auckland Library

Following the 2010–2011 Canterbury earthquakes, a renewed focus has been directed across New Zealand to the hazard posed by the country‘s earthquake-vulnerable buildings, namely unreinforced masonry (URM) and reinforced concrete (RC) buildings with potentially nonductile components that have historically performed poorly in large earthquakes. The research reported herein was pursued with the intention of addressing several recommendations made by the Canterbury Earthquakes Royal Commission of Inquiry which were classified into the following general categories:  Identification and provisional vulnerability assessment of URM and RC buildings and building components;  Testing, assessment, and retrofitting of URM walls loaded out-of-plane, with a particular focus on highly vulnerable URM cavity walls;  Testing and assessment of RC frame components, especially those with presumably non-ductile reinforcement detailing;  Portfolio management considering risks, regulations, and potential costs for a portfolio that includes several potentially earthquake-vulnerable buildings; and  Ongoing investigations and proposed research needs. While the findings from the reported research have implications for seismic assessments of buildings across New Zealand and elsewhere, an emphasis was placed on Auckland given this research program‘s partnership with the Auckland Council, the Auckland region accounting for about a third each of the country‘s population and economic production, and the number and variety of buildings within the Auckland building stock. An additional evaluation of a historic building stock was carried out for select buildings located in Hawke‘s Bay, and additional experimental testing was carried out for select buildings located in Hawke‘s Bay and Christchurch.

Images, UC QuakeStudies

Three buildings on Norwich Quay in Lyttelton, enclosed by safety fences. From left to right, the buildings are: Shadbolt House, Lyttelton Hotel and The Stand Gourmet Takeout and Cafe. Masonry from the Lyttelton Hotel building and The Stand has collapsed onto the road.

Images, UC QuakeStudies

A collapsed section of the Cranmer Courts on the corner of Montreal Street and Kilmore Street. Safety fences have been erected around the building to prevent the public getting close enough to it to be endangered by falling masonry in the event of another earthquake.

Images, UC QuakeStudies

A house on Avonside Drive showing damage from the 4 September 2010 earthquake. Numerous cracks in the masonry can be seen, and several sections of brick have fallen off the walls. The building's porch has also collapsed. A pile of dried liquefaction is visible in the driveway.

Images, UC QuakeStudies

St John's Presbyterian Church on Winchester Street in Lyttelton. The ground around the church has been strewn with masonry from the church's walls and collapsed tower. The spire of the collapsed tower has fallen in front of the church, which has been enclosed by a safety fence.

Images, UC QuakeStudies

St John's Presbyterian Church on Winchester Street in Lyttelton. The ground around the church is strewn with masonry that has fallen from the church's walls and collapsed tower. The building's front door has been red-stickered and a sign that reads "No entry" is stuck to it.

Images, UC QuakeStudies

A house on Avonside Drive showing damage from the 4 September 2010 earthquake. Numerous cracks in the masonry can be seen, and several sections of brick have fallen off the walls. The building's porch has also collapsed. A pile of dried liquefaction is visible in the driveway.

Images, UC QuakeStudies

The southern side of the Christ Church Cathedral with boarded up windows and damage to the roof above both of the transepts. Damaged masonry has been piled on the ground in front and one of the spires has been removed and braced with steel in the foreground.

Images, UC QuakeStudies

Damage to the church hall of St John the Baptist Church in Latimer Square. The roof has been weather proofed with plywood and there are cracks in the buildings masonry. The remains of fallen bricks can be seen on the footpath. A safety fence has been erected around the building.