Model description

Input

BIM model

Analysis model

Landscape model

ICDAS Basis of Design

Workflow of Software

Additional features

How to run ICDAS Addin in Revit?

ICDAS CSB 2022.00R is including Concrete Bridges (COB). Refer ICDAS COB about family files and how to run

addin in Revit.

Streamlines Steel Deck Box with Ribs

ICDAS provides automation for streamlined steel deck box for two options of ICDAS Bridges. Both use the same rule of input for top and bottom lines of deck in Excel BRIDGE sheet. Design with the two options are summarized below.

›    Addin in Generic_3D_Deck.rfa. The user gets an outer contour of the streamlined deck as shown in example above.

    Then apply ICDAS Manual to create thicknesses and load the stiffening ribs in the deck manually (this option 1 is

    default).

›    Addin in Profile_2D_Deck.rfa being use in Civil Structures. The user gets 2D profile of the deck and need to model

    the thicknesses (as Option 1) before customization in Civil Structures.

For both of options ICDAS created LusasCSB.cmd automatically for rectilinear alignment deck.

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Figure:  ICDAS Streamlines Steel Deck with Ribs.

ICDAS provides library of stiffening ribs for different sizes and shapes using in rectilinear alignment streamlined steel deck. Further, the users can apply the step-by-step ICDAS Manual to model new ribs and add to the library (Revit family files).

It is easy to load people in both of family or project files. It makes the drawings with dimensions even better to understand.

Updated 11-08-2013

Three spans cable-stayed bridge & Shapes of the pylons

ICDAS CSB 2019.00R allows you to create three spans cable stayed bridges. It can be a short footway bridge or a long span road bridge. The input is parametric and entered in Excel file. By changes of few inputs and run Add-Ins one will get a cable stayed bridge in A-Pylons (Top), H-Pylons (Centre) and V-Pylons (Bottom) shown below.

Figure: Cable stayed bridges in A-Pylons (Top), H-Pylons (Centre) and V-Pylons (Bottom)

Cable arrangements

The longitudinal layout of the cables is a fundamental issue due to the following considerations:

§         Structural performance of the bridge, static and dynamic

§         Method of erection and the economics

§         What desired effects regarding architectural impression.

ICDAS switch the cables arrangements of harp, fan or semi-fan system by vertical spacing h5 at the pylon. Both of Revit and Lusas models will be updated accordingly.

Figure: Harp system, h5=6300m

In harp system the declination angle of each cable is constant, which gives the same anchoring design at the

deck considering the case of longitudinal slope of the deck is 0.

Figure: Fan system, input h5=500m

In fan system all cables are connected to the pylon theoretically at the same height. This system has several

advantages compared to the harp pattern:

·  Vertical component of cable is more effectively used to carry the sectional weight of the deck

· Longitudinal component of the cables give less compression in the deck

· Bending of the pylon caused almost by one longitudinal force only as the sum of all cables connected to it.

However, the connection zone of the cables at the pylon in fan system is heavily concentrated, which requires

special design and analyses.

Figure: Semi-Fan system, h5=3000m

Semi-Fan system combines the advantages of the harp and the fan systems. In this system the vertical spacing

of the cables on the pylon can better be arranged than the concentrated zone of the fan system and the bending

of the pylons remains moderate.

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