Page 244 - Bridge and Highway Structure Rehabilitation and Repair

CHAPTER 5 LOAD AND RESISTANCE FACTOR RATING AND REDESIGN 219

Table 5.5b
ABUTMENT FOUNDATION LOADS: Factored Primary Forces & Moments From Computer Output
SERVICE LOADS
LOAD COMBINATIONS FOR Substr. DL + DL Reactions LL Reactions From Earth Loads on Substructure Windon Substr. + Wind on Live
SERVICE I, SERVICE II & From Superstructure Superstructure Wind React. From Load From
SERVICE III Superstructure Superstructure

(DC + DW) (LL+IM+BR)+(CE)+(LS) (EH) + (EV+ES) (WS) (WL)
FACTORED FACTORED
1.0EH+1
DL + HL-93 L L + EARTH PR. 1.0DC + 1.0 DW 1.0( LL+I+BR) .0EV+1.0ES 0.3 WS 1.0 WL
SERVICE I
DL+PERMIT LL+EARTH PR. 1.0DC + 1.0 DW 1.3( LL+I+BR) 1.0EH+1.0EV+1.0 ES _ _
SERVICE II
DL + WS + EARTH PR. 1.0DC + 1.0 DW 0.8( LL+I+BR) 1.0EH+1.0EV+1.0ES _ _
SERVICE III
Table 5.5c
ABUTMENT FOUNDATION LOADS: Factored Primary Forces & Moments From Computer Output
EXTREME LOADS
LOAD COMBINATIONS FOR Substr. DL + DL Reactions LL Reactions From Earth Loads on Substructure Wind On Substr. + Wind On Live
EXTREME EVENT I From Super Structure - Superstructure FACTORED Wind React. From Load From
FACTORED Superstructure - Superstructure
FACTORED
(DC + DW) MAX. (LL) (EH) + (EV+ES) MAX. (WS) (WL)
( D C + D W ) M I . N ( E H ( + ) E V + E ) S M I . N
5 . 1 E H + 3 . 1 5 E V + 5 . 1 E S + 0.3 WS 1.0 WL
1.0ED
DL + EARTHQUAKE 1.25DC + 1.5 DW 0.15( LL) 0.9EH+1.0EV+0.75ES+
EXTREME EVENT I 0.9DC + 0.65 DW 1.0ED
ED - MONONOBE-OKABE DYNAMIC FORCE
ES = EARTH SURCHARGE
LS = LIVE LOAD SURCHARGE

5.6.4 Primary Load Combined with Extreme Events
Table 5.6a LRFD primary and extreme load combinations for substructures.
Primary Loads Extreme Loads
(DC1 4 (LL+ FR 4 (EH) 4 (EV) FR WA IC CT CV AS PS EQ SE BL
DC2) 4 DW PL) 4 (LS) 4 (ES)
Earthquake p 1.75 p 1.00 1.00 1.00
Ice loads p 1.35 p 1.00 1.00 1.00
Vehicle collision p — p 1.00 1.00 1.00
Vessel collision p — p 1.00 1.00 1.00

Contraction and local p 1.35 p 1.00 1.00
scour at abutments 1.00
Contraction and local p 1.75 p 1.00 1.00 1.00
scour at piers
Superstructure collapse p 1.75 p 1.00 1.00 1.00
due to blast load
Settlement of foundation p 1.35 p 1.00 1.00 1.00
due to design or
construction error