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ductility of a shear wall designed for a future storey
you are asked to design a four-storey building accounting for a future additional storey. you design the shear walls for five stories using a load reduction factor r=3.5 ( for example). the owner doesn’t know when that additional storey will be added. obviously, the shear walls are over designed and the expected ductility is less by the over-design ratio. how do you dead with such case?
thanks
malkobani,
from what i know, ductility is a measure of the ability of an element/structure to yield before failure.
even if the shear wall is over designed, the ductility may be similar: ratio of force/displacement_when_starts_yielding and force/displacement_when_fails.
if you design the structure to accommodate 5 storeys and the building will be only 4 storeys, i can not see any problem. the structure is stiffer and deflects less.

2009-09-08, 07:55 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	ductility of a shear wall designed for a future storey ductility of a shear wall designed for a future storey you are asked to design a four-storey building accounting for a future additional storey. you design the shear walls for five stories using a load reduction factor r=3.5 ( for example). the owner doesn’t know when that additional storey will be added. obviously, the shear walls are over designed and the expected ductility is less by the over-design ratio. how do you dead with such case? thanks malkobani, from what i know, ductility is a measure of the ability of an element/structure to yield before failure. even if the shear wall is over designed, the ductility may be similar: ratio of force/displacement_when_starts_yielding and force/displacement_when_fails. if you design the structure to accommodate 5 storeys and the building will be only 4 storeys, i can not see any problem. the structure is stiffer and deflects less. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]