Seismic Strengthening

Seismic Strengthening

Summary:

Working closely with the building owners and tenants, Eliot Sinclair has provided assessment, reporting, design, consent, tender & construction contract administration and construction supervision services for numerous earthquake damaged building repair and seismic strengthening projects throughout the Canterbury region.

Whether it be minimising business interruption within an occupied building or assisting with the procurement of a suitable building contractor, Eliot Sinclair work with the building owner to develop a repair and strengthening strategy to achieve their individual needs and expectations. Buildings assessed, repaired and upgraded range in scale from 90m2 dairies to 33,000m2 shopping centres.

Example projects:

  • Amcor Factory –  Branston Street, Christchurch:
    In addition to the design of a new 1260m2 factory extension, Eliot Sinclair staff have been involved with the assessment and subsequent seismic strengthening of the existing 7,000m2 factory complex.The design accommodated the need to keep the main factory operating. This included the requirement to minimise dust and welding during construction in order to minimise the risk of contaminating produce. This challenge was achieved by developing a strengthening strategy which utilised a modular design and staged construction sequence. This allowed the bracing units to be installed quickly in a coordinated and staged manor throughout the building during periods when areas of the factory were offline for scheduled maintenance.
  • Northwood SupaCenta
    Northwood SupaCenta is a large 33,283m2 shopping centre in Christchurch that is home to a number of ‘big brand’ retailers. The centre experienced structural damage and liquefaction induced ground deformations following the 2010 and 2011 Christchurch earthquake sequence. Eliot Sinclair were engaged to provide engineering design services for the seismic strengthening of the building to 100% NBS (New Building Standard).The project involved the structural strengthening of the existing shopping centre building structures plus ground improvement work which was required to both relevel the buildings and mitigate liquefaction potential of the site.The project was required to meet significant operational challenges due to the shopping centre’s large floor area, and the client’s request for work to be carried out with minimal interruption to retail trading.
  • Shirley Shopping Centre – Hills Road, Christchurch:
    The project included the seismic strengthening of the 1275m2 Shirley Shopping Centre. Key complexities associated with this project included the relatively short 6 month timeframe for design, consenting and construction, coupled with the requirement to keep the existing retail tenancies operational with minimum interruption throughout. This was achieved by working closely with the building owner to procure a contractor at an early stage which enabled us to develop strengthening solutions and construction methodologies to suit the contractor and existing tenants.The strengthening work included the addition of portal frames, portal columns, roof bracing, panel connection brackets and some limited foundation improvements. All significant steelwork was installed through the roof at night time to mitigate health and safety risks to the building occupants. The remaining work was undertaken outside of peak trading hours in order to minimise business disruption.
  • Fendalton Shopping Centre – Block 4
    The project included the seismic strengthening of the 730m2 Fendalton Shopping Centre – Block 4. Again, a prerequisite included the requirement to enable the continued trading of the existing retail tenancies that occupied the building. This was achieved by producing a strengthening design that minimised internal disruption included the construction of a ply roof diaphragm, additional panel connections and some limited foundation improvement work. Eliot Sinclair also worked closely with the builder and owner to coordinate the main construction work to occur outside of peak trading hours and in a manner than mitigated the health and safety risks to building occupants.
  • Structweld workshop – Lismore Street, Christchurch:
    This project included the seismic retrofit of two interconnected, unreinforced concrete masonry and steel framed industrial buildings with a total floor area of 700m2. The strengthening design was developed in conjunction with the contractor who was also the building o The strengthening work included the installation of new roof bracing to integrate the lateral systems of both buildings plus the installation of steel transoms and mullions to masonry walls and some foundation improvement work.
  • Hirepool: Seismic Assessment and new canopy
    The project included the seismic assessment of an existing warehouse to enable its repurposing to a commercial & DIY equipment and plant hire facility. Through detailed assessment of the existing design and construction, Eliot Sinclair were able to demonstrate that the existing structure had sufficient lateral strength to avoid the need for significant strengthening work.The project also included the architectural and structural design of a significant new structural steel drive through canopy structure.

 

 

Skills

Posted on

November 20, 2018

Skills

Posted on

November 20, 2018