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Model
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description
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- Create
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- a
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- new
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- model
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- from
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- template.
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- Define
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- as
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- a
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- simple
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- span,
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- 40m
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- long,
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- with
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- steel
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- girders
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- cross-section.
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- Release
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- the
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- bearing
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- at
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- the
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- end
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- abutment
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- to
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- achieve
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- a
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- simply
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- supported
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- condition.
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- Define
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- point,
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- line,
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- and
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- area
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- loads
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- in
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- separate
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- as
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- follows:
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- Point load:
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- 10kN
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- load
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- applied
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- at
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- station
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- 20,
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- centered
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- transversely.
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- Line load:
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- 1kN/m
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- load
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- applied
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- between
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- stations
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- 15
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- and
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- 25,
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- centered
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- transversely.
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- Area load:
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- 0.1kN/m^2
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- load
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- applied
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- between
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- stations
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- 15
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- to
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- 25
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- and
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- across
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- the
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- width
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- of
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- the
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- deck.
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These loads will all cause an effect equivalent to loading the bridge midspan with a 10kN point load
- Run the analysis and check the midspan moments. For point loading, the theoretical midspan moment is given as follows:
Plan, elevation, and section diagrams depicting load application are given in Figure 1:
Model development
Define and apply loads
Use the Loads > Loads - Point command to define a new point load, as shown in Figure 2:
Use the Bridge > Loads > Point Loads command to assign the previously defined point load, as shown in Figure 3:
Using a similar approach, define and apply line and area loads.
Results
The moment diagrams below (Figures 4-6) depict the midspan moment expected.
Attachments
- CSiBridge V15.0.0 model (zipped .SDB file)