01045900

Component

The authors developed in their previous study the design aids for right angle approach slabs under the AASHTO HS20-44 truck load, considering the effect of embankment settlement. The present study investigated if these design aids are also valid for the AASHTO LRFD HL93 truck load and for skewed approach slabs. Furthermore, the capacity of the approach slab (designed by using the design aids) was rated in terms of three special truck loads. For these purposes, a 3-D finite element analysis was conducted to model the interaction between the approach slab and the embankment soils. The predicted internal moments provide design engineers with a scientific basis from which they can properly design the approach slab considering different levels of embankment settlements. A proper design of the approach slab will help mitigate the slab rideability (and structural safety) problems. Current AASHTO code specifications do not provide guidelines to design approach slabs that can accommodate a given embankment settlement.

01042056

07-2951

English

23p

2007

Transportation Research Board 86th Annual Meeting

CD-ROM

References (10) ; Tables (5)

Bridge approaches; Bridge decks; Bridge design; Bridge engineering; Bridges; Embankment foundations; Embankments; Settlement (Structures); Slabs; Structural analysis

Settlement (Embankments)

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls

Transportation Research Board Annual Meeting 2007 Paper #07-2951

TRIS, TRB

Feb 8 2007 7:40PM