szleok
Civil/Environmental
- Jun 10, 2004
- 18
ASCE figure 6-23 has Cf factor calculation for open trussed tower. Does anybody know how to calculate the wind force if the wind blows from other direction? Say, digonal direction.
ASCE says to use 75% wind force simultaneously on both orthogonal directions. That's true for enclosed building. But if I follow the Figure 6-23, I will get a much higher result. Here is the calc.:
Say, I have a 4 column square tower. I assign wind force on the windward 2 columns according to the Figure. If i look at the diagonal direction, there are 3 columns exposed to the wind direction. That's means all the 3 columns must be assigned.
I wonder is there any guideline for calculating the diagonal wind force on open structure.
Thank you
ASCE says to use 75% wind force simultaneously on both orthogonal directions. That's true for enclosed building. But if I follow the Figure 6-23, I will get a much higher result. Here is the calc.:
Say, I have a 4 column square tower. I assign wind force on the windward 2 columns according to the Figure. If i look at the diagonal direction, there are 3 columns exposed to the wind direction. That's means all the 3 columns must be assigned.
I wonder is there any guideline for calculating the diagonal wind force on open structure.
Thank you