Parametric model with embedded force analysis

Finally the parametric model is up and running. All forces working on each section are mathematically defined as a result of geometry, size and local cable forces and represented by a z and a xy vector. The moment is not considered, since any rotational deformation will happen around the central axis if the resulting z and xy forces are in equilibrium.

the bridge sections are mounted on two pipes (not drawn in the model) running in longitudinal direction. The area centroid of their sections is the center of rotation represented by a dot in the center of the moment. These pipes are thought to be stiff enough to take smaller loads in different directions. This is important, becouse equilibrium of the structure is reached manually, and it is impossible to reach perfect equilibrium from manipulating the cables and forces, and because the model is only an approximation. Forces of around 1ton is guessed to be acceptable, as long as the deviation is distributed in different directions along the bridge, and thus not working in the same direction accumulating greater forces.

A list of all acting forces can be received from the program as well, but the maximum cable forces are at the bridge ends, where they are defined.

This is a map of the resultig forces acting on each section as defined in the program. The black vectors represent the cable forces at the tips and the resulting forces from the curved pressurized pipes in the center. The blue vector represents the weight of bridge deck, cables and pipes and the red vectors represent the weights of the different parts af the section.

This is a map of the resultig forces acting on each section as defined in the program. The black vectors represent the cable forces at the tips and the resulting forces from the curved pressurized pipes in the center. The blue vector represents the weight of bridge deck, cables and pipes and the red vectors represent the weights of the different parts af the section.

We had to show this... The complex structure avaluates all forces and geometry. The geometry/densities/cable forces can be manipulated from more than 20 number sliders.

We had to show this... The complex structure avaluates all forces and geometry. The geometry/densities/cable forces can be manipulated from more than 20 number sliders.

The output of the program is goemtry and the resulting forces represented by two points. One showing the vertical, one showing the horizontal force vector. The length of the vector, the distance between the point and the center of the plane shown, is equal to the resulting force in 10kN (appr. 1 ton). The goal is to maniplate the geometry and the forces to get both the horizontal and the vertical points of all sections within one meter from the cenerpoint.

The output of the program is goemtry and the resulting forces represented by two points. One showing the vertical, one showing the horizontal force vector. The length of the vector, the distance between the point and the center of the plane shown, is equal to the resulting force in 10kN (appr. 1 ton). The goal is to maniplate the geometry and the forces to get both the horizontal and the vertical points of all sections within one meter from the cenerpoint.

Each bridge elemnt can be shaped by the program and "baked" to become "real" drawings. This picture shows the parametric model and a number of bridge elements drawn from it.

Each bridge elemnt can be shaped by the program and

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