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Modeling static loads in gtstrudl
1. MODELING STATIC LOADS in GTSTRUDL Load Classification By Category: DEAD, LIVE, ROOF, SNOW, WIND , SELF-RESTRAIN, EQ., NOTIONAL By Type: JOINT FORCE/MOMENT, MEMBER FORCE/MOMENT, DISPLACEMENT/SETTLEMENT, TEMPERATURE GRADIENT By Extent: CONCETRATED, UNIFORM, LINEAR, TRIANGULAR By Condition: INDEPENDENT, DEPENDENT, PSEUDO-STATIC
2. MODELING STATIC LOADS in GTSTRUDL Classes of Static Loadings (Table 9.1-2, Analysis Guide)
3. MODELING STATIC LOADS in GTSTRUDL Independent Static Loadings DEAD LOADING Command (Section 9.4.2, Analysis Guide) DEAD LOAD ‘DL’ ‘DEAD’ DIRECTION –Y MEMBERS 1 TO 5 Need to be deleted and redefined if members properties change
4. MODELING STATIC LOADS in GTSTRUDL Independent Static Loadings SELF WEIGHT LOADING Command (Section 9.4.1.1, Analysis Guide) SELF WEIGHT LOAD ‘SW’ ‘SELF WEIGHT’ DIRECTION –Y ALL MEMBERS Computed during the Stiffness Analysis process. For immediate computation use
5. MODELING STATIC LOADS in GTSTRUDL Independent Static Loadings LOADING Command (Section 9.3, Analysis Guide) LOADING 1 ‘MACHINE LOADS’ Creates a new Independent Static Loading Condition, which will contain a set of Applied Static Loading Types Use CHANGES mode to Add, Modify, or to Delete Applied Static Loading Types. Use DELETIONS mode to remove an entire Static Loading Condition
6. MODELING STATIC LOADS in GTSTRUDL Applied Static Loading Types JOINT LOADS Command (Section 9.5, Analysis Guide) JOINT LOADS 1 TO 11 BY 2 FORCE Y 5.3 Z -9.1 250 ‘ABC’ ‘JT-13’ FORCE Z 19.8 MOMENT X 10.0 To add, or modify use the CHANGES mode of the LOADING Command.
7. MODELING STATIC LOADS in GTSTRUDL Applied Static Loading Types JOINT DISPLACEMENTS Command (Section 9.6, Analysis Guide) JOINT DISPLACEMENTS 1 5 7 19 DISPLACEMENT Y -1.5 250 ‘ABC’ ‘JT-13’ DISPL X 1.4 Y -0.5 ROTZ 3.5 To add, or modify use the CHANGES mode of the LOADING Command.
8. MODELING STATIC LOADS in GTSTRUDL Applied Static Loading Types MEMBER LOADS Command (Section 9.7, Analysis Guide) MEMBER LOADS 10 TO 20 MOMENT Z CONC FR M -25 L 0.3 1 TO 5 FORCE X GLOBAL UNIFORM FR W -1.2 / W -2.0 LA 0.0 LB 0.5 5 TO 9 FORCE Y LINEAR WA -1.0 WB -0.5 LA 0.2 LB 3.5
9. MODELING STATIC LOADS in GTSTRUDL Applied Static Loading Types MEMBER TEMPERATURE LOAD Command (Section 9.8, Analysis Guide) MEMBER TEMPERATURE LOADS 10 TO 20 AXIAL 30 1 TO 5 AXIAL 20 BENDING Z 20
10. MODELING STATIC LOADS in GTSTRUDL Applied Static Loading Types MEMBER DISTORTIONS Command (Section 9.9, Analysis Guide) MEMBER DISTORTIONS ‘B1’ ‘B2’ CONCENTRATED FR L 1.0 DISPLACEMENT X -1.5
11. MODELING STATIC LOADS in GTSTRUDL Other Independent Static Loadings AREA LOAD Command (Section 9.15, Analysis Guide) AREA LOAD 2 ‘TRIB A’ DIRECTION Y ELEVATION 12.0 LIMITS X 0.0 30.0 Z 0.0 60.0 EXCEPT LIMITS X 10.0 20.0 – Z 15.0 25.0 VALUE 10.0 TWO WAY END AREA LOAD
12. MODELING STATIC LOADS in GTSTRUDL Other Independent Static Loadings FORM LOAD Command (Section 10.1, Analysis Guide) FORM LOAD ‘DESIGN1’ ‘DESIGN LOAD 1’ FROM ‘DL’ 1.4 ‘LL’ 1.6 Needed for Non-Linear analysis May affect computation time for linear analysis Applied Static Loading Types can be added using the CHANGES mode. May be recomputed using
13. MODELING STATIC LOADS in GTSTRUDL Other Independent Static Loadings FORM NOTIONAL LOAD Command (Section 10.1.3, Analysis Guide) FORM NOTIONAL LOAD ‘NX_LL’ ‘HORIZONTAL NOTIONAL LOADS’ – FROM ‘LL’ 1.0 GRAVITY AXIS Y NLDIRECTION X NLFACTOR 0.002 – JOINTS EXISTING AISC 13 Requirement Does not get updated after updating Self Weight loads
14. MODELING STATIC LOADS in GTSTRUDL Dependent Static Loadings LOADING COMBINATION Command (Section 10.2.1, Analysis Guide) LOADING COMBINATION 200 ‘DESIGN LOAD 200’ – SPECIFICATIONS ‘LL’ 1.6 ‘DL’ 1.4 ‘WIND’ -1.0 Results updated right after Stiffness Analysis. Use COMBINE Command to compute results if the loading combination is created after the Stiffness Analysis has been performed. (Section 10.2.3, Analysis Guide)
15. MODELING STATIC LOADS in GTSTRUDL Dependent Static Loadings CREATE LOADING COMBINATION Command (Section 10.2.2, Analysis Guide) CREATE LOADING COMBINATION 200 ‘DESIGN LOAD 200’ ABSOLUTE – SPECIFICATIONS ‘LL’ 1.6 ‘DL’ 1.4 ‘WIND’ -1.0 Cannot be used before Stiffness Analysis has been performed. All of the Loadings used in the Specification must have computed results.
