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218 SECTION 2 STRENGTHENING AND REPAIR WORK
Table 5.5 LRFD primary and secondary load combinations for substructures.
Primary Loads Secondary Loads
Wind on
Unfactored Substr.
Substr. DL Unfactored Earth Unfactored Water Wind on
DL Reac- LL Reactions Loads Wind React. Loads Live Load Erection Temper- Support
Load tions from from on from on from Load from Concrete ature Settle-
Combinations Superstr. Superstr. Substr. Superstr. Substr. Superstr. Superstr. Properties Gradient ment
DC 4 (DC1 (LL 4 IM 4 (EH) & (WS) (WA) (WL) (EL) (TU) 4 (TG) (SE)
4 DC2 4 BR 4 PL) 4 (EV 4 ES) (CR 4 SH)
DW ) (CE) 4 (LS)
DL 4 HL-93 p 1.75 p — 1.00 _ p — TG SE
LL (Strength I)
DL 4 permit p 1.35 p — 1.00 — p — TG SE
LL (Strength II)
DL 4 WL p — p 1.40 1.00 — p 1.40 TG SE
(Strength III)
DL of superstr. p — p — 1.00 — p — — —
4 substr.
(Strength IV)
DL of super p 1.35 p 0.40 1.00 — p 0.40 TG SE
4 substr. 4
live load 4
reduced wind
on superstr. 4
substr. 4 wind
on live
(Strength V)
Table 5.5a
FX, FY, FZ & MOMENTS MX, MZ FOR EACH LOAD COMBINATION
ABUTMENT FOUNDATION LOADS: Factored Primary Forces & Moments From Computer Output
STRENGTH
LOAD COMBINATIONS FOR Substr. DL + DL Reactions LL Reactions From Earth Loads on Substructure -Wind On Substr. + Wind On Live
STRENGTH I, STRENGTH II, From Super Structure - Superstructure - FACTORED Wind React. From Load From
STRENGTH III & STRENGTH V FACTORED FACTORED Superstructure - Superstructure -
FACTORED FACTORED
USE ENVELOPES OF (DC + DW) MAX. (LL+IM+BR)+(CE)+(LS) (EH) + (EV+ES) MAX. (WS) (WL)
FACTORED LOADS ( D C + D W ) M I . N ( E H ( + ) E V + E ) S M I . N
DL-SUPER+DL-SUBSTR+HL- 1.25DC + 1.5 DW 1.75( LL+I+BR) 1.5EH+1.35EV+1.5ES __
93 L L + EARTH PR.
STRENGTH I 0.9DC + 0.65 DW 0.9EH+1.0EV+0.75ES
DL-SUPER+DL-SUB+PERMIT 1.25DC + 1.5 DW 1.5EH+1.35 EV+1.5ES
LL + EARTH PR.
STRENGTH II 0.9DC + 0.65 DW 1.35( LL+I+BR) 0.9 EH+1.0EV+0.75ES __
DL + WS + EARTH PR. 1.25DC + 1.5 DW 1.5EH+1.35EV+1.5ES
STRENGTH III 0.9DC + 0.65 DW _ 9 . 0 E H + 0 . 1 E V + 5 7 . 0 E S 1.4 WS _
DL-SUPER+DL-SUBSTR.+ 1.25DC + 1.5 DW 1.35( LL+I+BR)
LIVELOAD+REDUCEDWIND
ON SUPERSTR. +
WIND ON LIVE 0.9DC + 0.65 DW 1.5EH+1.35EV+1.5ES 0.4 WS1.0 WL
STRENGTH V 0.9 EH+1.0EV+0.75ES
FOR FOOTING DESIGN ES = EARTH SURCHARGE
CE = 0
STRENGTH IV = 0MY = 0LS = 0ES = 0 LS = LIVE LOAD SURCHARGE
IM = 0