Dear all,
As per B31.3, A302.3.4-(a)Wind and earthquake forces need not be considered as acting concurrently. refer the below load case is the acceptable or not.
1) W+P1+T1
2) W+P1+T2
3) W+P1
4) WW+HP
5) U1
6) U2
7) U3
8) WIN1
9) WIN2
10) D1
11) L1-L3
12) L2-L3
13) L1+L5+L7+L8+L10 Algebraic
14) L1-L5+L7-L8+L10 Algebraic
15) L1+L6+L7+L9+L10 Algebraic
16) L1-L6+L7-L9+L10 Algebraic
17) L5+L6+L7 SRSS
18) L3+L17 Abs
19) L3+L8+L17 Abs
20) L3+L9+L17 Abs
21) 2L10+L11+L12 Abs

For Load case 13 to 16 and 18 to 21. they mention the combination of wind and seismic acceleration.

Is it possible to combine. could you please guide me.

Note:
We are doing pipe stress analysis of FPSO.