Hello to everybody. This is my first question on discussion forums, I hope I could find some help from you.
Is it appropiate to model restraints with gaps under seismic conditions?
Our client says that it is not acceptable because supports with GAP will generate shock effect (dynamic effect) not taken into account in a quasi static analysis.
Other question. I have used the following load cases. Load cases from 1 to 11 will be used for loads on restraints, and load cases from 34 to 43 for code stress check.Do you find them correct?
Thank you very much

L1 W+T1+P1 OPE Normal Operating Conditions
L2 W+T2+P2 OPE Operating at Design Conditions
L3 W+T3+P1 OPE Operating at Minimum/Maximum Ambient
L4 W+T1+P1+WIN1 OPE Operating + Wind 1
L5 W+T1+P1+WIN2 OPE Operating + Wind 2
L6 W+T1+P1+U1 OPE Operating + U1
L7 W+T1+P1-U1 OPE Operating + (-U1)
L8 W+T1+P1+U2 OPE Operating + U2
L9 W+T1+P1-U2 OPE Operating + (-U2)
L10 W+T1+P1+U3 OPE Operating + U3
L11 W+T1+P1-U3 OPE Operating + (-U3)
L12 W+P1 SUS Sustained with Operating Pressure
L13 W+P2 SUS Sustained with Design Pressure
L14 L1-L12 EXP Installation to Normal Operating Temp.
L15 L2-L13 EXP Installation to Design Temperature
L16 L3-L12 EXP Installation to Min./Max. Ambient
L17 L15-L16 EXP Design Temp. To Min./Max. Ambient
L18 L4-L1 OCC Wind 1
L19 L5-L1 OCC Wind 2
L20 L6-L1 OCC U1 (Seismic acceleration X direction)
L21 L7-L1 OCC -U1 (Seismic acceleration (-X) direction)
L22 L8-L1 OCC U2 (Seismic acceleration Y direction)
L23 L9-L1 OCC -U2 (Seismic acceleration (-Y) direction)
L24 L10-L1 OCC U3 (Seismic acceleration Z direction)
L25 L11-L1 OCC -U3 (Seismic acceleration (-Z) direction)
L26 L20+L22 OCC U1+U2
L27 L20+L23 OCC U1-U2
L28 L21+L22 OCC -U1+U2
L29 L21+L23 OCC -U1-U2
L30 L24+L22 OCC U3+U2
L31 L24+L23 OCC U3-U2
L32 L25+L22 OCC -U3+U2
L33 L25+L23 OCC -U3-U2
L34 L12+L18 OCC Sustained + Wind 1
L35 L12+L19 OCC Sustained + Wind 2
L36 L12+L26 OCC Sustained + (U1+U2
L37 L12+L27 OCC Sustained + (U1-U2)
L38 L12+L28 OCC Sustained + (-U1+U2)
L39 L12+L29 OCC Sustained + (-U1-U2)
L40 L12+L30 OCC Sustained + (U3+U2)
L41 L12+L31 OCC Sustained + (U3-U2)
L42 L12+L32 OCC Sustained + (-U3+U2)
L43 L12+L33 OCC Sustained + (-U3-U2)