A****F
发帖数: 699 | 1 ASCE12.7.2要求加入25% storage live load to effective seismic weight for
storage room.
My question is to add this 25% storage load to seismic load,I have to define
mass source with dead load, multiplier 1 and storage multiplier 0.25.
At 'define static load case names', I choose dead load with self weight
multiplier 1,for storage, should I set self weight multiplier to 0 or 1?
Thanks
★ 发自iPhone App: ChineseWeb 7.7
★ 发自iPhone App: ChineseWeb 7.7 |
C*S
发帖数: 1658 | 2 It depends on what type (dead or live) you select when you define the "
storage load" in the "Define Static Loads." |
A****F
发帖数: 699 | 3 I define storage as live load
★ 发自iPhone App: ChineseWeb 7.7
【在 C*S 的大作中提到】
: It depends on what type (dead or live) you select when you define the "
: storage load" in the "Define Static Loads."
|
C*S
发帖数: 1658 | 4 IMHO, use 0 for self weight multiplier. I think this multiplier is for slabs
and beam/columns/walls whose self weight can be automatically calcualted by
the software based on their density and volume. You did not define storage
density and volume, right?
【在 A****F 的大作中提到】
: I define storage as live load
:
: ★ 发自iPhone App: ChineseWeb 7.7
|
A****F
发帖数: 699 | 5 I see.
But how do I know extra 25% being added?
slabs
by
storage
★ 发自iPhone App: ChineseWeb 7.7
★ 发自iPhone App: ChineseWeb 7.7
【在 C*S 的大作中提到】
: IMHO, use 0 for self weight multiplier. I think this multiplier is for slabs
: and beam/columns/walls whose self weight can be automatically calcualted by
: the software based on their density and volume. You did not define storage
: density and volume, right?
|
C*S
发帖数: 1658 | 6 when you define the mass sources, specify 1.0 for DL and 0.25 for LL.
If you are not sure, you can do a simple example and check the result.
【在 A****F 的大作中提到】
: I see.
: But how do I know extra 25% being added?
:
: slabs
: by
: storage
: ★ 发自iPhone App: ChineseWeb 7.7
: ★ 发自iPhone App: ChineseWeb 7.7
|
T**9
发帖数: 1528 | 7 If you use Selfweight+mass+loads option, be sure not to include 1.0 DL if
you aleady define Dead Load with Selfweight multiplier 1.0. Otherwise the
selfweight will be counted twice.
If you have other Dead Loads other than selfweight of the structrue, define
them as Superimpose Dead loads with selfweight multiplier set to 1.0.
It is safer to use "From Loads" option.
I agree that you should always check your result by reading the total base
reaction and comparing to the very simple formula
Total base shear V = Cs* W(total seismic weight)
【在 C*S 的大作中提到】
: when you define the mass sources, specify 1.0 for DL and 0.25 for LL.
: If you are not sure, you can do a simple example and check the result.
|
T**9
发帖数: 1528 | 8 You should have only one Dead Load Case with selfweight multiplier 1.0.
For all other cases including other supper imposed dead loads, selfweight
multiplier should all be set to 0.
define
【在 A****F 的大作中提到】
: ASCE12.7.2要求加入25% storage live load to effective seismic weight for
: storage room.
: My question is to add this 25% storage load to seismic load,I have to define
: mass source with dead load, multiplier 1 and storage multiplier 0.25.
: At 'define static load case names', I choose dead load with self weight
: multiplier 1,for storage, should I set self weight multiplier to 0 or 1?
: Thanks
: ★ 发自iPhone App: ChineseWeb 7.7
: ★ 发自iPhone App: ChineseWeb 7.7
|
