- Auto-generate a two-dimensional shape of a cable stayed bridge using Cable Stayed Bridge Wizard. It generates symmetric and non-symmetric bridges with truss and box sloped girders.
From the main menu, select [Structure] tab > [Cable Bridge] group > [Cable Bridge] > [Cable Stayed Bridge]
Cable Stayed Bridge Wizard dialog box
Node Coordinates & Heights
Enter the coordinates of the nodes defining a cable-stayed bridge.
Assign the symmetry of the cable-stayed bridge.
A : Origin point of the girder
B : Top of the left pylon
C : Top of the right pylon
D : End point of the girder
Height : Height of pylon
H1 : Height of the left pylon
H2 : Height of the right pylon
Depth of Deck
Enter the height(we call here depth) of the truss-girder structure.
When the depth is not entered, the girder is modeled as a beam. And, when it is entered, the girder is modeled as a truss consisted of upper and lower chords connected by diagonal members.
Cable : Materials and cross-sectional properties applied to cable components
Deck : Materials and cross-sectional properties applied to deck components
Tower : Materials and cross-sectional properties applied to tower components
Select Cable & Hanger Element Type : Assign the element type for the cable and hangers.
Truss : Truss element
Tension Only(Cable) : Equivalent truss element for linear analysis & Elastic catenary element for nonlinear analysis are automatically selected.
When selecting the Tension Only (Cable) element, it becomes an equivalent truss element for linear analysis and is automatically designated as an elastic catenary element for nonlinear analysis.
Distance from Deck to Tower : Horizontal distance separating the girder from the tower
Shape of Deck : Slope and arc length signifying the curvature
Left Slope(%) : Slope at the left end of the arc
Arc Length(m) : Arc length
Enter the arc length, (C-B) long if only the center span is sloped. In order to specify a slope throughout the entire length of the bridge, enter a length equal to or greater than (D-A).
Right Slope(%) : Slope at the right end of the arc
Cable Distances & Heights
Enter the distances between the cables and the heights of the cables located at the towers.
Left : Cable spacings and heights in the left span
Center : Hanger spacings and heights in the center span
Right : Hanger spacings and heights in the right span
Node No. : Display node numbers
Member No. : Display member numbers
Bitmap : Display the position and shape representing the data.
Drawing : Display the overall shape of the bridge using the data entries.
Update & Draw : It is activated when Drawing is selected. It displays the entire shape reflecting the entered data.
OK : Generate the data by computing all the nodal coordinates, elements and the initial tensile forces in the cables using the initial data, and close the Wizard window.
Close : Cancel the data entries and close the Wizard window.
In the dialogue box, the most recently entered data is displayed as the default, and the value initially set as the default when first executed is input data for an approximate 2D shape of the Samcheongpo Bridge in Korea.