The Seismic Assessment of Existing Buildings (the Guidelines) provides a technical basis for engineers to carry out seismic assessments of existing buildings within New Zealand.
Part C of the Guidelines describes the Detailed Seismic Assessment (DSA) process used to assess the seismic behaviour of a building. This is a more comprehensive assessment than the Initial Seismic Assessment (ISA) process described in Part B. The DSA assesses the structural load paths within the building, the capacity of each structural element, the likely inelastic mechanisms, the global building response to earthquake shaking and the impact of secondary structural and critical non-structural building elements.
The DSA process is based on the Part A principles, which are an integral part of the seismic assessment process. Sections C1, C2, C3 and C4 provide an overview of the DSA process, the assessment procedures and analysis techniques, the earthquake demands and geotechnical considerations. Sections C5 to C9 provide recommendations for specific materials and Section C10 provides recommendations for secondary structural and non-structural elements. Each of these build on the common aspects within Sections C1 to C4 and Part A.
The Assessment Summary Report is used to summarise the key points from ISAs and DSAs and must be included at the front of all engineering assessments for earthquake-prone buildings purposes.
Part C is available as individual printable sections. The sections are:
- C1 – General Issues
- C2 – Assessment Procedures and Analysis Techniques
- C3 – Earthquake Demands
- C4 – Geotechnical Considerations
- C5 – Concrete Buildings
- C6 – Structural Steel Buildings
- C7 – Moment Resisting Frames with Infill Panels
- C8 – Unreinforced Masonry (URM) Buildings
- C9 – Timber Buildings
- C10 – Secondary Structural and Non-structural Elements
All ten of the Part C sections can be downloaded in one zip file: Part C – Detailed Seismic Assessment (27 MB). Please use the individual section links below (once published) to ask questions.
Sections within Part C have been peer reviewed, with reviewers drawn from a team of international and New Zealand subject matter experts.