Browsing Proceedings of the 2021 New Zealand Society for Earthquake Engineering Annual Technical Conference by Title
Now showing items 7-26 of 115
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An attempt to determine a relationship between a mass-spring-friction damper single-degree-of-freedom system’s equivalent viscous damping ratio and its corresponding friction coefficient
(2021-04-14)Damping forces are always present in real structures, occurring in several different forms, making them challenging to model expressly. Damping is often assumed to be viscous in nature, due to the simplicity of the ... -
An automation approach to the seismic assessment and strengthening of unreinforced masonry buildings
(2021-04-14)Large scale seismic assessments in areas of dense unreinforced masonry buildings (URM) is a significant challenge for structural engineers. URM buildings respond to earthquake excitation with a variety of mechanisms as ... -
Application of the Geotechnical Step-Change Provisions of the 2017 MBIE Guidelines for the Seismic Assessment of Buildings
(2021-04-14)The Seismic Assessment of Existing Buildings, Technical Guidelines for Engineering Assessments (“the Guidelines”) provides engineers with a consistent means to assess the seismic behaviour of existing buildings with respect ... -
Are stronger, stiffer buildings indeed costlier?: Case study of RC frame buildings
(2021-04-14)Seismic codes/standards allow buildings to be designed for different lateral strength as long as the associated ductility and drift demands are catered for. The design seismic force is primarily controlled by a force ... -
Assessment of boundary conditions for 2D geotechnical site-response analysis with soil heterogeneity
(2021-04-14)This paper examines various boundary condition assumptions for modelling 2D geotechnical site response, which requires a more sophisticated treatment of the boundary and loading conditions than what is typically required ... -
ATC-145: Influence of prior shaking on earthquake response and repair requirements for structures and elements
(2021-04-14)ATC-145 is a FEMA funded project aimed at developing a Guide for repair of earthquake damaged buildings to achieve future resilience. Thanks in part to EQC funding, the project includes substantial New Zealand representation. To ... -
Balancing seismic resilience and lean design to reduce the embodied carbon of buildings
(2021-04-14)The building and construction sector needs to make big changes to reduce greenhouse gas emissions if New Zealand is going to meet the legally binding targets of the 2019 Zero Carbon Act, and its commitments under the Paris ... -
Base isolation: the good, the bad and the ugly
(2021-04-14)In the light of the recent Christchurch and Kaikoura earthquakes and the life safety and economic uncertainties they pose, the need for “low damage design” has become more important. In theory a “low damage design” should ... -
Blenheim gravel liquefaction assessment using the Chinese dynamic cone penetration test
(2021-04-14)Worldwide, one of the issues that has been constantly brought to attention by engineers is the lack of guidance for geotechnical characterization and liquefaction assessment of gravelly soils. In gravelly soils, the ... -
Case studies on low damage mass timber structures with resilient connections
(2021-04-14)There is increasing public pressure to have seismic-resistant structures made with massive wooden panels such as Cross Laminated Timber (CLT). It is well-known that the type and behaviour of the connections govern the ... -
CentrePort Wellington: Resilient regeneration activity
(2021-04-14)Wellington’s Pipitea port precinct - a critical lifeline and economic contributor to Wellington and surrounding regions – suffered significant damage and associated operational disruption as a result of the 2016 Kaikoura ... -
Cyclic behaviour of hold-downs using mixed angle self-tapping screws in Douglas-fir CLT
(2021-04-14)Long self-tapping screws are now commonly used in mass timber construction in New Zealand and globally due to their high strength and ease of installation on site. Under axial loads, self-tapping screws are strong and stiff ... -
Damageability of Hollow-core Floors
(2021-04-14)The life safety risk of precast hollow-core floors during earthquakes have been well recognised in New Zealand since early 2000s. Hollow-core floor unts in ductile buildings may experience web cracking at drift demands ... -
Design of the Ashburton District Council Civic Centre: A steel designers' learnings from an engineered timber building design
(2021-04-14)This paper discusses the learnings from the structural engineering for the Ashburton District Council (ADC) Civic Centre. The building was initially steel but after consulting with the Ashburton community an alternative ... -
Design of RSFJ Self-centring Brace for Ultimate Limit State
(2021-04-14)In previous studies, it was shown that the RSFJ brace assembly is prone to elastic buckling for which a new mechanism composed of two telescopic sections was introduced as a remedy to increase the elastic buckling load, ... -
Designing for Uncertainty
(2021-04-14)Structural engineers are familiar with seismic design using a compliance pathway. This typically requires ensuring the provided capacity of structures, expressed as a single value, exceeds the seismic demand, also expressed ... -
Determining the realistic rotational stiffness of column base connections in steel seismic resisting systems
(2021-04-14)The New Zealand Steel Structures Standard, NZS 3404, provides an upper and lower rotational stiffness boundary for fixed and pinned column base connections for structural analysis, respectively. These boundaries aim to ... -
Developing LSN-based pipe repair rate functions utilising data from the 2011 Canterbury earthquakes
(2021-04-14)The Canterbury Earthquake Sequence adversely impacted built, economic and social environments. This included widespread physical damage to the water supply pipe network in Christchurch, resulting in long service disruptions. ... -
Development and implications of an expanded national earthquake catalogue for New Zealand
(2021-04-14)In the last two decades, New Zealand (NZ) has experienced significant earthquakes, including the 2010 M 7.2 Darfield, 2011 M 6.2 Christchurch, and 2016 M 7.8 Kaikōura events. Amongst these large events, tens of thousands ... -
Development of Dissipative Controlled Rocking Bridge Columns on Monopile Foundations
(2021-04-14)In this research, a low-damage seismic design detail is developed for bridge columns supported on monopile foundations. The low-damage system aims to minimise, and potentially eliminate, the repair time and costs to a ...