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IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 3
Pontes de concreto armado: efeitos da corrosão e da variação do módulo de elasticidade do concreto
rior to 30.0 m and of these, 53.9% have only one span. Consider-
ing all the informed bridges, for all the standard vehicle-load, the
percentage is practically the same (50%).
2. Characterization of models
In reason to the exposed, the representative adopted bridge for
analysis is in simply supported beam by reinforced concrete, with
a span of 20.0 m and with cross section dimensions according to
Among the 642 bridges projected with the 240 KN standard ve-
hicle-load, there were no records of the spans for 243 of them.
Figure 4 presents a distribution of the 399 bridges projected with
240 KN standard vehicle-load, by the number of spans, in which
54% of them are simply supported beam.
Among the 399 bridges projected with 240 KN standard vehicle-
load with the number of spans known, two had the values of the
spans not informed. Figure 5 presents the distribution of the 397
bridges projected with 240 KN standard vehicle-load, by bands of
maximum spans emphasizing that 93% have maximum span infe-
Figure 2 – Distribution of the number of bridges by its structural system, excluding the bridges not informed
Figure 3 – Distribution of bridges by standard
vehicle-load excluding the bridges not informed
0
500
1000
1500
2000
2500
3000
3500
TB450
TB360
TB240
237;9,6%
1587;64,4%
642;26,0%
DISTRIBUTION OF BRIDGES BY
STANDARD VEHICLE-LOAD
Figure 4 – Distribution of bridges designed
with TB240 by number of spans,
excluding the ones not informed
0
50
100
150
200
250
1
1+2c
2
2+2c
3
3+2c
Other
136;34,1%
79;19,8%
15;3,8%
14;3,5%
41;10,3%
47;11,8%
67;16,8%
DISTRIBUTION OF BRIDGES
DESIGNED WITH TB240 BY
NUMBER OF SPANS