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concrete column
i have a 16"x16"x12' concrete column with 4" masonry attached all around(24"x24" overall dimension).
when calculating the radius of gyration, aci states that it is permissible to use 0.3x the overall dimension in the direction stability is being considered.
the dimension of the concrete column is 16", however, the "overall dimension" of the column is 24". is the masonry included in the "overall dimension"? which dimension should be used to compute the slenderness?
my thought is that since the radius of gyration is a section property and is independent of the material, it should include the masonry.
any thoughts?
imho, the masonry should not be included when calculating the radius of gyration.
i might change my opinion if you are counting on the masonry to carry some of the load, but that opens up a whole other can of worms in regards to the design.
i would just be conservative and not include it.
i second broekie.
ignore the brick.

2009-09-08, 11:52 AM	#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	concrete column concrete column i have a 16"x16"x12' concrete column with 4" masonry attached all around(24"x24" overall dimension). when calculating the radius of gyration, aci states that it is permissible to use 0.3x the overall dimension in the direction stability is being considered. the dimension of the concrete column is 16", however, the "overall dimension" of the column is 24". is the masonry included in the "overall dimension"? which dimension should be used to compute the slenderness? my thought is that since the radius of gyration is a section property and is independent of the material, it should include the masonry. any thoughts? imho, the masonry should not be included when calculating the radius of gyration. i might change my opinion if you are counting on the masonry to carry some of the load, but that opens up a whole other can of worms in regards to the design. i would just be conservative and not include it. i second broekie. ignore the brick. __________________ 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]