This page describes topics related to bridge tendons.

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Generation of tendon layout within bridge girders

As of CSiBridge V18.1.1, the The tendon layout within individual bridge girders is generated as follows:

• Layouts for all tendons are defined based on the bridge layout line and then "projected" transversely to each girder or to specified offset distance distances along the mesh lines or , which are the bridge-object section-cut orientations. When the meshing is not even (such as due to skewed supports), this projection might cause slight distortion of the tendon profile.
• Mesh lines are typically perpendicular to the layout line, but may be skewed in the vicinity of skewed bridge supports, diaphragms (cross-frames), or user-defined discretization points.
• The projected tendon profile may be distorted from that defined on the layout line when the discretization lines are not parallel, such as due to a curved layout line or to changing skew of the mesh lines.
• The impact of this distortion can be eliminated by defining user discretization points with bearing angles set to match the desired direction of the projection. This in fact provides some degree of flexibility to control the tendon generation.
• Future version of the program will allow adding girder lines as additional  tendon profile reference lines so users not only can define a tendon based on the layout line but they can pick one of the girder line as the reference line.

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Bridge tendon tips

• The bridge modeler creates bridge tendons which users may modify through the Define > Section Properties > Tendon Sections menu. Please edit tendons within the bridge modeler, and not outside, as their properties may be overwritten during update.

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