Investigation of the Collapse Risk of Concrete Shearwall Buildings Under Long Duration Ground Motions


Abstract eng:
Recent megathrust earthquakes in Tohoku, Japan (Mw 9.0, 2011), El Maule, Chile (Mw 8.8, 2010), and Sumatra, Indonesia (Mw 9.1, 2004) have served as reminders that large magnitude, long duration earthquakes are possible in subduction zones around the world. Reconnaissance teams have repeatedly reported large levels of damage from these events, due in part to the high number of load reversal cycles. Additionally, many experimental tests indicate that load duration and number of cycles are highly important to the observed damage. Most studies using numerical models of structures also agree that ground motion duration is of significant importance when considering cumulative damage measures. However, currently, no such provisions for shaking duration are required in most building codes. This may be in part due to the conflicting results of studies which consider the effect of ground motion duration on peak structural response (drift or displacement). This paper aims to reduce the uncertainty in the effect of ground motion duration on the collapse risk of mid- and high-rise concrete shearwall buildings in South-western British Columbia. This area is affected by the Cascadia Subduction Zone, which is capable of producing magnitude 9.0+ earthquakes. A 20 storey archetype building model is considered analyzed with several suites of ground motions. The suites of ground motions are selected to represent long- and short-duration motions. Both NBCC code-level and analyses and collapse level analyses are performed. The results of this study will be useful in developing future design provisions for worldwide subduction tectonic zones.

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Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 4487.:
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