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Combinations

Table 1. Combinations - AASHTO LRFD
Combination   Description   SUM-SW   SUM-SDL   SUM-PT   SUMF-CS SUMD-CS Traffic.sup Brake.sup WindS.sup WindT.sup TempF-U.sup TempD-U.sup TempG.sup Settle.sup EQ.sup
Max Min Max Min Max Min Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max
Comb1.sup SERVICE I 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.20 1.00 1.00 0.30 1.00 1.00 1.20 0.50 1.00 -
Comb2.sup SERVICE II 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.20 1.30 1.30 - - 1.00 1.20 - - -
Comb3.sup SERVICE III 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.20 0.80 0.80 - - 1.00 1.20 0.50 1.00 -
Comb4.sup SERVICE IV 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.20 - - 0.70 - 1.00 1.20 - 1.00 -
Comb11.sup STRENGTH I 1.25 0.90 1.50 0.65 1.00 1.00 0.50 1.20 1.75 1.75 - - 0.50 1.20 - 1.00 -
Comb12.sup STRENGTH II 1.25 0.90 1.50 0.65 1.00 1.00 0.50 1.20 1.35 1.35 - - 0.50 1.20 - 1.00 -
Comb13.sup STRENGTH III 1.25 0.90 1.50 0.65 1.00 1.00 0.50 1.20 - - 1.40 - 0.50 1.20 - 1.00 -
Comb14.sup STRENGTH IV 1.50 0.90 1.50 0.65 1.00 1.00 0.50 1.20 - - - - 0.50 1.20 - - -
Comb15.sup STRENGTH V 1.25 0.90 1.50 0.65 1.00 1.00 0.50 1.20 1.35 1.35 0.40 1.00 0.50 1.20 - 1.00 -
Comb16.sup EXTREME EVENT I 1.25 0.90 1.50 0.65 1.00 1.00 - - 1.00 1.00 - - - - - - 1.00
Comb17.sup EXTREME EVENT II 1.25 0.90 1.50 0.65 1.00 1.00 - - 0.50 0.50 - - - - - - -
Comb18.sup FATIGUE - - - - - - - - 0.75 0.75 - - - - - - -

Abstract of predefined Load-Combinations

Combination I and II - "permanent loads"

  • Comb.I: t=0
  • Comb.II: t=oo

SERVICE - Combinations III to VII

  • Comb.III: SERVICE I (incl. Live load)
  • Comb.IV: SERVICE I (excl. Live load)
  • Comb.V: SERVICE II
  • Comb.VI: SERVICE III
  • Comb.VII: SERVICE IV
  • Comb.VIII: SERVICE I - deflection (incl. live load)
  • Comb.IX: SERVICE I - deflection (excl. live load)

STRENGTH - Combinations XI to XV

  • Comb.XI: STRENGTH I
  • Comb.XII: STRENGTH II
  • Comb.XIII: STRENGTH III
  • Comb.XIV: STRENGTH IV
  • Comb.XV: STRENGTH V

EXTREME - Combinations XVI to XVII

  • Comb.XVI: EXTREME I (earthquake)
  • Comb.XVII: EXTREME II (collision by vessels)
Table 2. Combinations - Eurocode
Combination   Description   SUM-SW   SUM-SDL   SUM-PT   SUM-CSt0 SUM-Cstinf LM1-TS.sup LM1-UDL.sup PedL.sup Brake.sup WindS+T.sup WindS+T.sup Temp.sup Settle.sup EQ.sup
Max Min Max Min Max Min Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max Min/Max
Characteristic comb.                                    
Comb1.sup SLS - (Pm) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 (AND) 1.00 1.00 1.00 - - - 0.60 - 1.00 -
Comb2.sup SLS - (t=0) 1.00 1.00 1.00 1.00 1.10 1.10 1.00 - 1.00 1.00 - - - 0.60 - 1.00 -
Comb3.sup SLS - (t=oo) 1.00 1.00 1.00 1.00 0.90 0.90 1.00 1.00 1.00 1.00 - - - 0.60 - 1.00 -
Comb4.sup SLS - (Pm) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 (AND) 1.00 1.00 1.00 0.40 - - - 0.60 1.00 -
Comb5.sup SLS - (t=0) 1.00 1.00 1.00 1.00 1.10 1.10 1.00 - 1.00 1.00 0.40 - - - 0.60 1.00 -
Comb6.sup SLS - (t=oo) 1.00 1.00 1.00 1.00 0.90 0.90 1.00 1.00 1.00 1.00 0.40 - - - 0.60 1.00 -
Frequent comb.                                    
Comb7.sup SLS - (t=0) 1.00 1.00 1.00 1.00 1.10 1.10 1.00 - 0.75 0.40 - - - - 0.50 1.00 -
Comb8.sup SLS - (t=oo) 1.00 1.00 1.00 1.00 0.90 0.90 1.00 1.00 0.75 0.40 - - - - 0.50 1.00 -
Quasi-permanent comb.                                    
Comb9.sup SLS - (t=0) 1.00 1.00 1.00 1.00 1.10 1.10 1.00 - - - - - - - 0.50 1.00 -
Comb10.sup SLS - (t=oo) 1.00 1.00 1.00 1.00 0.90 0.90 1.00 1.00 - - - - - - 0.50 1.00 -
Fundamental comb.                                    
Comb11.sup ULS 1.35 1.00 1.35 1.00 1.00 1.00 1.00 (AND) 1.00 1.35 1.35 0.60 - - - - - -
Comb12.sup ULS 1.35 1.00 1.35 1.00 1.00 1.00 1.00 (AND) 1.00 1.35 1.35 - - - 0.9 - - -
Comb13.sup ULS 1.35 1.00 1.35 1.00 1.00 1.00 1.00 (AND) 1.00 1.01 0.54 0.54 1.35 - - - - -
Comb14.sup ULS 1.00 1.00 1.00 1.00 1.00 1.00 1.00 (AND) 1.00                 1.00

Abstract of predefined Load-Combinations

SLS - Combinations I to VI - "Characteristic combinations"

  • Comb. I, IV: Pm, t=0, t=oo
  • Comb. II, V: Pk, t=0
  • Comb. III, VI: Pk, t=oo

SLS - Combination VII and VIII - "Frequent combinations"

  • Comb. VII: Pk, t=0
  • Comb. VIII: Pk, t= oo

SLS - Combinations IX to X - "Quasi-permanent combinations"

Comb. IX: Pk, t=0

Comb. X: Pk, t= oo

ULS - Combinations XI and XIII - "Fundamental combinations"

  • Comb. XI, XII: gr1
  • Comb. XIII: gr2

ULS - Combination XIV - "Seismic combination"

  • Comb. XIV