Due consideration shall be given to internally fragile OFCs equipped with stop anchors or snubbers comprising air gaps as large shock accelerations may be induced if the OFC impacts on its supports during strong shaking [see Clause 9. Seismic Standard — Technical Guides — NPMS — Real Property — PSPC Examples include emergency response facilities, electric power systems, telecommunication systems, water supply, wastewater collection and treatment systems, hospitals and nursing homes, large assembly occupancies, industrial risk-generating facilities, laboratories and hazardous csx, art galleries and museums, and correctional institutions see Annex G. However, as a result of damage caused by recent earthquakes, focus has shifted to the behaviour of OFCs in vsa building performance. The optimum level of upgrade shall be selected based on a holistic review of financial, functional, operational, security, and client requirements, including a review of the Investment Analysis Report.
|Published (Last):||6 November 2017|
|PDF File Size:||10.95 Mb|
|ePub File Size:||1.72 Mb|
|Price:||Free* [*Free Regsitration Required]|
It supersedes the previous editions published in and Earthquakes have rendered many buildings unusable due to extensive damage to their operational and functional components OFCs commonly referred to as non-structural components , including building contents. The main cause of casualties and property damage in the event of an earthquake is often the failure of these OFCs.
In many cases, losses associated with damage to these components are considerably greater than damage to the structural system. National codes and guidelines are in place for the seismic design, evaluation, and upgrading of building structures in Canada. This Standard is intended to address the need to reduce the seismic risk of OFCs and thus improve the post-earthquake functionality of buildings.
Changes to this edition include a harmonization with the National Building Code of Canada NBCC , ; b a general reorganization of contents; c revisions in definitions and symbols; d update of references; e revised definitions of OFC performance objectives; f a revised clause Clause 5 on procedures for OFCs in new buildings; g new flowcharts Figures 3 to 5 to better illustrate the various procedures described in this Standard; h a revised clause Clause 7.
A building is made up of components that can be divided into two groups: structural components and operational and functional components OFCs see Figure 1. Some OFCs can contribute to the structural integrity of a building, depending on their location, type of construction, and method of fastening, but these are not generally considered structural components.
OFCs are divided into three categories of sub-components: a architectural external and internal ; b building services mechanical, plumbing, electrical, and telecommunications ; and c building contents common and specialized. Some examples of building components and sub-components are listed in Figures 1 and 2.
This Standard does not address those OFCs which are lightweight, non-hazardous, and relatively inexpensive in the context of the building and its functionality.
However, as a result of damage caused by recent earthquakes, focus has shifted to the behaviour of OFCs in overall building performance. Risk to safety, damage to property, and loss of function and operation in a building can be significantly affected by the failure or malfunction of OFCs even if the building structural system has performed well during an earthquake.
The damage resulting from these components can be considerably more than that arising from structural component failure, particularly in areas of low and moderate seismic intensity. Buildings in Canada that are designed in accordance with early codes can be vulnerable to the failure or malfunctioning of OFCs after an earthquake. In a number of cases, improvements to the overall seismic performance of the building can be achieved by improving the performance of OFCs.
While seismic risk reduction of OFCs is affected by the structural performance of a building, this Standard does not address structural integrity see Clause 1. This Standard applies to new and existing buildings including renovations , and to major occupancy classifications listed in Appendix A of the NBCC Groups A to F namely: assembly, care or detention, industrial, residential, business and personal services, and mercantile , and post-disaster buildings.
Note: Lifeline components in the immediate vicinity of the building and essential to its performance objective such as transformers, back-up power generators, fuel tanks, elevators, etc. Note: Examples include emergency response facilities, electric power systems, telecommunication systems, water supply, wastewater collection and treatment systems, hospitals and nursing homes, large assembly occupancies, industrial risk-generating facilities, laboratories and hazardous materials, art galleries and museums, and correctional institutions see Annex G.
Structural aspects are covered by the building codes and other publications referenced in Clause 2. These systems require special interfacing design and details at the building junction to allow for differential movements between the building and its surrounding environment.
It is important that building owners, building designers, utility designers, and geotechnical experts coordinate the interface design and details. However, the application of this Standard can result in continued functionality and operation for certain OFCs, depending on the intensity of shaking and the level of over-design introduced in the mitigation scheme. Note: Intrinsic functionality issues refer to the functionality of those OFCs that would be adversely affected by the malfunction of one or more elements damaged by the design earthquake.
Most complex OFCs containing electronic parts, for example that are used in high seismic areas are designed and built with internal seismic isolation and subjected to seismic qualification testing. Systems comprising several OFCs especially those involving fluid or gas flow require careful assessment of interconnections. Due consideration shall be given to internally fragile OFCs equipped with stop anchors or snubbers comprising air gaps as large shock accelerations may be induced if the OFC impacts on its supports during strong shaking [see Clause 9.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative mandatory or informative non-mandatory to define their application.
CSA S832 PDF