Guiseppe
I do not claim to be able to recommend papers or resources to view in this
area.
However I raise an issue related to airbag/ airspring suspensions that may
not be appreciated.
This would be necessary to consider if the bridge expansion joint generates
a road surface height discontinuity or is adjacent to a height
discontinuity.
You may be aware that airbag suspensions have been determined to be "road
friendly" and a static or slow speed test devised to determine the "road
friendliness" of these suspensions.
It is now apparent that this test is inadequate to predict how the airbag
suspension will perform in travel because it fails to:
determine how the airbag pressures vary when axles individually and
successively make contact with a discontinuity; and
determine how the airbag height control system works in travel (this
system may generate very large variations in individual air bag pressures in
travel depending on the road roughness, camber and other factors.
The implications at discontinuities on a bridge are that depending on airbag
diameter, airbag height, the load being supported by the airbags and the
diameter, length and arrangement of the tubing connecting the airbags, and
the height control valve system characteristics and intelligence, the loads
applied to the bridge or bridge expansion joint can vary dramatically.
John
----- Original Message -----
From: "Giuseppe Loprencipe" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, March 14, 2001 2:20 AM
Subject: Heavy Vehicle - Bridge joint interaction
I'm a PhD in University of Rome and I develop my activity of researcher
within the course "Design of Road Infrastructures".
This course introduces the techniques of design, planning and management of
the road infrastructures.
The course aims to the students of civil engineering.
In this period I am dealing with the problems of interaction between
vehicle and pavement and in particularly of the dynamic interactions
between the bridge joints and the heavy vehicles (truck). This with the
goal to determine, before of all, the dynamic actions existing in the
expansion joints of the bridges in the different traffic situation.
I have already retrieved the following documentation.
NCHRP Report n. 353 - Effects of Heavy-Vehicle .....
NCHRP Report n. 402 - Fatigue design of modular bridge expansion joints
Handbook of vehicle-pavement interaction - CEBON D.
I would greatly appreciate any help (technical document, paper, articles,
ecc)
Best Regards
Dott. Ing. Giuseppe Loprencipe, PhD
Dipartimento di Idraulica, Trasporti e Strade
via Eudossiana, 18
00184 ROMA
tel. 0644585112
fax. 1782241353
e-mail: [log in to unmask]
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