Page History

...

Draft Flagship Programme 2018:

Flagship 3 Coordinated Project will provide fundamental research on risks, impacts, and solutions for multi-storey existing buildings in Wellington, with a particular focus on commercial buildings generally of concrete construction. Wellington commercial market will likely be heavily impacted by new seismic assessment guidelines due to typical clauses in rental contracts that buildings must be above 67% NBS.  Many new assessments are likely to fall below 67%.  Furthermore, densification of the CBD with 50,000 new residents in the next 20 years, will result in conversion of many commercial buildings to housing with a change in the risk profile for the city.

Past focus, in terms of both research and policy on existing buildings, has generally been on lowrise URM although large nonductile concrete buildings likely represent the greatest life safety and economic risk in NZ. Furthermore, assessment and retrofit approaches for concrete buildings more complex and expensive than URM, thus requiring additional research focus.

Understanding the risks and impacts of multi-story building failures and achieving viable solutions requires a multi-disciplinary approach. The Wellington focus provides contextual connection between the disciplines and provides connection with several additional complementary efforts:

• Flagship 5 with a focus on Wellington Resilience Strategy
• Smart Seismic Cities being developed in collaboration with WCC and EQC
• Future Wellington Earthquake Case Study through QuakeCoRE for scenario studies

2018 efforts under the Flagship 3 Coordinated Project have been identified as follows (most efforts expected to continue beyond 2018:

• CBD-wide studies:

–      Inventory (occupancy, ownership, condition, proportion of CBD), regional modelling to consider impacts of failures of existing concrete buildings (Nick/Ken)Student funding

–      Cordoning – baseline study (Caroline/Laurie Johnston/Jason(Shannon))

• • • Student funding
• Structural Engineering:

–      Deformation capacity of nonductile columns with high axial loads (Ken)

• • • Scholarship student, funding for testing

–      Assessments and retrofits for precast floors and diaphragm load path (Angela/Des/ Ken/Rick)

• • • BRANZ funding?

–      Modelling of whole-of-building performance – relation between %NBS and collapse probability (Reagan)

• • • Student funding
• Social/Economic/Legal:

–      Prioritisation/trade-offs in retrofit/replacement/status-quo/change-of-use/etc of concrete buildings (including role of insurance) (Ilan/Olga)

• • • Student funding

–      Legal perspectives on risk for tenants and owners of commercial buildings (John Hopkins/Julia)

• • • Project/Student funding
• Joint with Flagship 5

–      Social perspectives on risk for tenants and owners of commercial buildings (Julia/ John McLure/David Johnston)

• • • Funding from Flagship 5

–      Iwi ownership of building assets in Wellington and Mautaranga perspectives (coordinated with FP5 Wellington iwi project – F3 rep?)

• • • Engagement funding 

...