Keynote Address Tribute to Tom Paulay Session 3 Session 4A Session 4B Session 5A Session 5B Session 6 Session 7A Session 7B Session 8A Session 8B Poster Session 

Incorporating Boundary Conditions into a Detailed Seismic Assessment Procedure for New Zealand URM Buildings

Alistair Russell and Jason Ingham

Many unreinforced masonry (URM) buildings in New Zealand can be expected to perform poorly in an earthquake. The construction of such buildings was common in the early part of the 20th Century, but design philosophies were focused on gravity loading, with little thought given to the lateral force resistance of URM walls. Consequently many URM buildings form a significant part of both New Zealand’s heritage building stock and that group of buildings which are considered potentially earthquake prone.

Testing of URM walls showed that the presence of flanges has a significant effect on the in-plane response of the wall. Equations are recommended for determining the in-plane lateral strength limits of URM walls with flanges. Drift limits and energy dissipation characteristics are also proposed, depending on the in-plane wall failure mode.

Paper P38: [Read]

Shake Table Tests of Under-designed RC Frames for the Seismic Retrofit of Buildings – Design and similitude requirements of the benchmark specimen

P. Quintana-Gallo, S. Pampanin, A.J. Carr and P. Bonelli

In the past years, extensive experimental work on innovative feasible retrofit solutions has been carried out at the University of Canterbury, as part of the FRST Project ‘Seismic Retrofit Solutions for NZ Multi-storey Buildings’. The experiments have consisted in quasi-static test of 2/3 scale beam column joint subassemblies representative of pre-70’s reinforced concrete (RC) frame buildings, referred herein as under-designed structures (non-ductile detailing, no capacity design principles), before and after retrofit. As a dynamic validation of the seismic vulnerability of such structures and the feasibility of the developed and improved retrofit solutions, a series of 4 1/2.5 scale experimental models (two 3 storey - 2 bay frames jointed together by transverse beams and floor slabs) will be tested on the shake table, without and with a seismic retrofit intervention and without and with infill panels. The retrofit interventions will include techniques such as the Metallic Haunch, FRP layers, and Shape Memory Alloys (SMA) braces, targeting for two different performance levels: Life Safety and Damage Control. In this paper, the overall description of the dynamic tests, the development of the experimental models and the similitude requirements are described.

Paper P39: [Read]

Initiatives Towards Integrated Resilience of Road Transportation Lifelines in the Wellington Region

P. Brabhaharan

Fundamental to being ready for earthquakes is to understand the risks, implement risk reduction, and plan for post earthquake response. Transportation lifelines function as integral networks and it is important that they be considered across road controlling authority boundaries, to enable emergency response and mitigation planning.

NZTA co-ordinated a study to integrate the risk assessment results to develop a single resilience map for the Greater Wellington Area. The initial studies carried out over a period of time were integrated using a common resilience framework, by deriving and presenting performance states for each of the three networks of Wellington, Hutt City and the State Highways (NZTA). Integrated resilience maps are now available, allowing authorities to implement strengthening of their networks and plan for emergency response, considering vulnerabilities across the entire network.

NZTA’s participation in the Pheonix V Exercise identified the importance of using up to date information on the vulnerability of roads, the time likely to be taken for recovery, and prior planning of the post-earthquake response for key vulnerabilities (bridges, retaining walls and significant steep slopes). NZTA has initiated development of post-earthquake response plans. This has been helped by observations of response after the 2008 Wenchuan Earthquake in China.

Paper P40: [Read]

Keynote Address Tribute to Tom Paulay Session 3 Session 4A Session 4B Session 5A Session 5B Session 6 Session 7A Session 7B Session 8A Session 8B Poster Session