Moment Envelope Generation form (Mat Foundation)
Used to choose longitudinal reinforcement directions and a generate moment envelope.
Mat slab is a physical entity in STAAD Foundation Advanced, so to design the slab, program uses a unique technique. It first divides the slab into finite number of discrete points and then calculates stress on those nodes to create moment envelope. Please note that program automatically transforms stresses to the specified longitudinal direction.
To generate moment envelope you first need to define longitudinal reinforcement direction. You can define X,Z coordinate to define an axis or click on any two points on the screen.
| Setting | Description |
|---|---|
| Select Current Panel | If you have multiple boundaries you need to choose current panel to be designed. By default program selects the first created boundary. |
| Longitudinal Axis Setup | There are two methods to define the longitudinal axis. You can setup the axis either by defining two X,Z coordinates or by clicking on two points on the screen. |
| By drawing a line on slab | Select this option to click on two points on the screen to define longitudinal axis. Once the first point is clicked program will draw a line from the first point to the mouse point to show the axis. After second point is clicked on the screen, program will calculate the X,Z coordinates of those points and fill up the form start and end coordinates. |
| By specifying coordinates | Select this option to input X,Z coordinates of the start and end points of the axis. By default program shows a global X axis as longitudinal axis. |
| Division along longitudinal axis | Number of slab divisions along longitudinal axis. It must be a positive number. Program uses 60 divisions as default value. |
| Division along transverse axis | Number of slab divisions along transverse axis. It must be a positive number. Program uses 60 divisions as default value. |
| Select load type | Shear and reinforcement design for foundation are done only for ultimate (factored) load combinations. User has the option here to choose only load cases defined as ultimate or all load cases assigned to the current job. |
| Generate Moment envelope | Creates a grid and calculates the moment envelope on the grid intersection points. |