Section

Divide the cross-section to generate longitudinal members for the grillage model.

From the Main Menu select Structure > Wizard > Grillage Model Wizard > Section

Select a cross-section

Typical Section: Select a cross-section to be divided into longitudinal members. The division locations of this section are applied to all the cross-sections along the bridge. The sections will only be shown which are defined in the Section Assignment in the Section tab.

 Note:

1. The applicable type of section is PSC-nCell, PSC-nCell2, and PSC-Value.

2. The number of cells shall be not less than two.

3. There must be a horizontal line at the top and bottom inside the cell.

 Divide a cross-section

Divided Num: Number of longitudinal members

Division Option: Automatically divide the cross-section for the grillage model according to two methods as follows.

Web-Based: The deck is cut into ’r;I-beams’ midway between webs.

Slab-Based: The deck is cut into ’r;I-beams’ so that each web has identical proportions of top and bottom slab.

Web- Based                                                                        Slab- Based

Total: The section properties of the cross-section of the whole bridge before division

D1: The section properties of each longitudinal member after division.

Torsion Constant per unit width of the longitudinal member and transverse member:

Moment of inertia per unit width of the transverse member:

Dm: The section properties of each longitudinal member with regard to the centroid of bridge cross-section before division.

Division Locations: After dividing cross-section into ’r;I-beams’ of the grillage model according to Division Option, change division locations by modifying the values of the table directly.