EGNEGN--5439 The Design of Tall Buildings5439 The Design of Tall Buildings

Lecture 41Lecture 41

ETABS – Load Combinations

Define the Static Load Cases.Define the Static Load Cases.

Create the Wind Load Cases.Create the Wind Load Cases.

Create the Rigid Diaphragms.Create the Rigid Diaphragms.Select All, then assign shell rigid diaphragm.Select All, then assign shell rigid diaphragm.

ASCEASCE--7 Code Combinations7 Code CombinationsCase # X Y MX MY

1 1 12 -13 14 -1

2 1 0.875 0.252 0.875 -0.253 -0.875 0.254 -0.875 -0.255 0.875 0.256 0.875 -0.257 -0.875 0.258 -0.875 -0.25

3 1 0.75 0.752 -0.75 0.753 0.75 -0.754 -0.75 -0.75

4 1 0.655 0.655 0.19 0.192 0.655 0.655 -0.19 0.193 0.655 0.655 0.19 -0.194 0.655 0.655 -0.19 -0.195 0.655 -0.655 0.19 0.196 0.655 -0.655 -0.19 0.197 0.655 -0.655 0.19 -0.198 0.655 -0.655 -0.19 -0.199 -0.655 0.655 0.19 0.19

10 -0.655 0.655 -0.19 0.1911 -0.655 0.655 0.19 -0.1912 -0.655 0.655 -0.19 -0.1913 -0.655 -0.655 0.19 0.1914 -0.655 -0.655 -0.19 0.1915 -0.655 -0.655 0.19 -0.1916 -0.655 -0.655 -0.19 -0.19

• 1.2DL + 1.6LL• 1.2DL + 0.8W• 1.2DL + 1.6W + 0.5L

Apply the Loading to the DiaphragmApply the Loading to the Diaphragm..