Layout
Rail Track Analysis Model Layout dialog box
Bridge Data
Bridge Material : Define material for the superstructure of a bridge by using material properties previously defined in Material Properties dialog box.
Deck Information : Input the number of decks and their lengths.
4@50, 70 : 4 decks of 50 m each and a deck of 70 m compose a bridge of 270 m.
Embankment Length : Enter the embankment length.
Span Type : Define support condition and span length for the bridge. The program provides four most frequently used types.
Advanced... : Span condition and span length can be tabulated as per the user's preference.
If the maximum number of span was entered as 4, then four slots will be available for span length. The values for the span lengths are to be entered sequently, which should not exceed the total length of the deck. If exceeded, the remaining slots will be locked once exceeded.
Rail Data
Rail Material : Define rail materials by using material properties previously defined in Material Properties dialog box.
Number of Track : Enter the number of tracks (Max = 2).
Additional Check : Define additional verification conditions commonly applied to both cases.
Zero Lateral Resisitance : Zero Lateral Resistance can be defined. When an additional stress exceed a certain level, zero lateral resistance can be installed to reduce the additional stress. It is defined with respect to the left end of the embankment and with zero resistance of ballast at the defined section.
Rail Expansion Joints : When Zero Lateral Resistance is not capable to reduce the additional stress to a certain level, Rail Expansion Joints can be installed. The location of Rail Expansion Joints refers to its left end when defined.