The use of rocking walls in confined masonry structures : a performance-based approach. (2002)
Type of ContentTheses / Dissertations
Degree NameDoctor of Philosophy
PublisherUniversity of Canterbury. Department of Civil and Natural Resources Engineering
Excessive economic loss and large social impact, due to extensive damage and operational problems in aseismic structures, has been observed following recent earthquakes. This situation is leading to the formulation of a new design paradigm in seismic-engineering. Performance-based design, addressing life-safety, damage-control and functionality issues, is expected to supersede in the near future the current prescriptive serviceability/life-safety approach. In this context, the observed extent of damage in masonry structures, as a consequence of recent moderate and strong earthquakes, seems to disqualify this traditional material in a performance-based environment. Masonry-structures with low density of lateral-force-resisting masonry-walls are among the buildings most likely to be damaged by moderate and strong earthquakes. The use of rocking walls is proposed here as an alternative to improve the seismic performance of these kind of buildings without having to give up the masonry as an integral part of the structure. It was found that rocking confined-masonry walls with hysteretic-energy-dissipators at their base can be reliably designed to match target drifts, which are closely correlated to the extent of the damage in a building. It is shown in this thesis that hysteretic-energy-dissipators can provide a reliable energy-dissipation source that allows the seismic design of this sort of structures with any of the new methodologies proposed to meet seismic performance-objectives, A design procedure adapted from the Direct Displacement Method is developed in the core of this thesis. A prototype structure is designed with the proposed method and a reduced-scale model is built and tested dynamically in a shake table. The experimental results confirmed that rocking walls can be successfully adapted to confined masonry structures. A numerical analysis is also conducted here, with good matching of the experimental results, providing a new tool to deepen the understanding of this system.
RightsCopyright Luis Alberto Toranzo-Dianderas
Showing items related by title, author, creator and subject.
Toranzo-Dianderas, Luis Alberto (University of Canterbury. Civil Engineering, 2002)Excessive economic loss and large social impact, due to extensive damage and operational problems in aseismic structures, has been observed following recent earthquakes. This situation is leading to the formulation of a ...
Towards performance-based design of MDOF structures with explicit consideration of residual deformations Christopoulos, C.; Pampanin, Stefano (University of Canterbury. Civil Engineering., 2004)Most structures designed according to current code provisions will sustain residual deformations in the event of a design-level earthquake, even if they perform exactly as expected. Despite this reality, little consideration ...
Towards a New Delivery Approach to Improve the Performance of Non-Structural Elements in New Zealand Sullivan T; Stanway J; Dhakal, Rajesh (2018)Observations made in past earthquakes, in New Zealand and around the world, have highlighted the vulnerability of non-structural elements such as facades, ceilings, partitions and services. Damage to these elements can ...