experimental campaign on the full scale frp motorway bridge
DESCRIPTION
We present the main results of an experimental campaign conducted at the ELSA laboratory of the Joint Research Centre on a hybrid-composite, fibre-reinforced, motorway bridge beam. The 14 metre long specimen is an identical prototype of the actual beams installed on a real (now functional) highway interchange roundabout in Madrid, Spain. The bridge ensemble consists of two 3×14 metre length, dual lane, two-way carriages capable of carrying fully laden heavy truck stock. The scope of the test campaign was to assess the design and ultimate capacity of the primary bridge beam and the participatory reinforced concrete deck system. The test set-up was designed to induce serviceability and limit loads in an isostatic manner, reflecting the primary load-bearing conditions within the context of the bridge as a whole (four parallel sets of three spans of simply supported beams connected by a reinforced concrete deck). In order to monitor the complex behaviour, the specimen was extensively instrumented with nearly two hundred channels – of which over one-hundred strain gauges – and stereoscopic photogrammetry with which to monitor in-(and out)-of-plane global displacements and buckling. The bridge beam-deck deflections during the deck grouting and subsequent curing were monitored for four weeks, after which the test campaign proper began with experimental modal analysis, followed by a comprehensive cyclic test campaign to confirm the serviceability and ultimate limit state of the bridge. The experiments were concluded with a test up to failure.TRANSCRIPT
EXPERIMENTAL CAMPAIGN ON A FULL SCALE FRP MOTORWAY BRIDGE
Martin Poljanšek a
Eugenio Gutiérrez a
Philippe Capéran a Carlo Paulotto b Enrique Navarro Lera b
a ELSA, IPSC, Joint Research Centre, European Commission b Acciona Infraestructuras Correspondence: [email protected]
Three simply supported spans
10m + 14m + 10m
20.40m wide box-girder deck
M-111 motorway
Barajas int. airport
Madrid
The Specimen
The Loading set-up
In the European Laboratory for Structural Assessment
JRC – European Commission
In the European Laboratory for Structural Assessment
JRC – European Commission
The Instrumentation Channel #
Strain gauge 108 Displacement t. 32
Inclinometer 9 Load cell 10
Test up to the Ultimate Limit State
-50
-40
-30
-20
-10
0
10
0 500 1000 1500 2000 2500
Mid
poin
t dis
plac
emen
t (m
m)
Time (s)
LVDT_16_experimental LVDT_16_numerical
-0.5
0
0.5
1
1.5
2
0 1000 2000
Stra
in (m
ε)
Time (s)
g_05_experimental g_05_numerical
-2
-1.5
-1
-0.5
0
0.5
0 1000 2000
Shea
r str
ain
(mγ)
Time (s)
shear_30_experimental shear_30_numerical
0 10 20 30 0
200
400
600
800
1000
1200
1400
Midpoint displacement [mm]
Load
[kN
]
Average stiffness = 38.4 kN/mm Max. Load = 1500 kN Max. Midpoint Disp. = 38.95 mm
Test up to the Ultimate Limit State
Field of view of the optical stereo-rig
Displacement map at the peaks of the load
Test up to Failure
2657kN @ 78.98mm
Linear elastic response at the ULS
Failure at 1.76 x ULS
Shear buckling of the webs
Rupture of the bottom FRP face
TOWARDS EU-WIDE BRIDGE DESIGN GUIDELINES AND TECHNOLOGY USING ADVANCED COMPOSITES
- workshop -
Joint Research Centre, Ispra 6,7 December 2011
To ascertain the status and perspectives for the use of
fibre-reinforced composites in civil engineering, with
particular emphasis to bridges.
Contact: [email protected] [email protected]
http://elsa.jrc.ec.europa.eu/events.php?id=7
Thank you!