Sensitivity of NBCC 2005 base shear to the fundamental period. Gilles, D. & McClure, G. In volume 3, pages 1795 - 1804, Toronto, ON, Canada, 2010. Base shear;Code equations;Design base shears;Design load;Empirical equations;Fundamental period;National Building Code of Canada;Seismic load;abstract bibtex The 2005 edition of the National Building Code of Canada (NBCC 2005) provides empirical equations to predict the fundamental lateral period of a building to help structural designers calculate design seismic loads. The code allows designers to use other methods to estimate the period, but it imposes restrictions on the deviation from the value calculated from the code equations. However, these equations are not accurate, and therefore the period of a building once it is constructed may differ significantly from the value used in design. On the one hand, when the code period is used in design, the period can be expected to be more than 75 percent longer in certain cases. Conversely, when the seismic design is based on the maximum period allowed by the code, the period can be expected to be more than 65 percent shorter in certain cases. This uncertainty in predicting the period leads to inaccurate design loads. In certain cases, the design base shear may be overestimated by more than 50 percent (if the code period is used), or underestimated by up to 300 percent (if the maximum allowable period is used).
@inproceedings{20124115551846 ,
language = {English},
copyright = {Compilation and indexing terms, Copyright 2023 Elsevier Inc.},
copyright = {Compendex},
title = {Sensitivity of NBCC 2005 base shear to the fundamental period},
journal = {9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium},
author = {Gilles, D. and McClure, G.},
volume = {3},
year = {2010},
pages = {1795 - 1804},
address = {Toronto, ON, Canada},
abstract = {The 2005 edition of the National Building Code of Canada (NBCC 2005) provides empirical equations to predict the fundamental lateral period of a building to help structural designers calculate design seismic loads. The code allows designers to use other methods to estimate the period, but it imposes restrictions on the deviation from the value calculated from the code equations. However, these equations are not accurate, and therefore the period of a building once it is constructed may differ significantly from the value used in design. On the one hand, when the code period is used in design, the period can be expected to be more than 75 percent longer in certain cases. Conversely, when the seismic design is based on the maximum period allowed by the code, the period can be expected to be more than 65 percent shorter in certain cases. This uncertainty in predicting the period leads to inaccurate design loads. In certain cases, the design base shear may be overestimated by more than 50 percent (if the code period is used), or underestimated by up to 300 percent (if the maximum allowable period is used).<br/>},
key = {Seismic design},
keywords = {Codes (symbols);Seismology;Architectural design;Engineering geology;Codes (standards);Structural dynamics;},
note = {Base shear;Code equations;Design base shears;Design load;Empirical equations;Fundamental period;National Building Code of Canada;Seismic load;},
}
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