Tutorial
Define the geometry of the structure (Steps 1-5)
Definir la geometría de la estructura (Pasos 1-5)
1) Define the grid spacing, meaning the distance between nodes in metros. You should always use a grid spacing divisible by the dimensions of the structure (a number is said to be divisible by another number if the remainder is 0). For example if you want to model a rectangular beam of length 4m and 3m deep, you can choose a grid spacing of 1m or 0.5m.
2) Define the number of nodes, meaning the number of vertices in a polygon enclosing the structure. Using the same example of Step 1), you should use 4 nodes.
3) Whenever you are ready press the submit button.
4) Define the coordinates of the vertices of the polygon of Step 2) moving counterclockwise in meters. Using the same example of Step 1):
X: 0 Y: 0
X: 4 Y: 0
X: 4 Y: 3
X: 0 Y: 3
If neccesary holes can be taken into account. For more details visit the Example section.
5) When you are ready press the update button. The resulting structure and discretization will be displayed.
Define the boundary conditions (Steps 6-8)
Definir las condiciones de borde (Pasos 6-8)
6) Define the number of nodes with kinematic boundary conditions. Continuing with the same example of Step 1), if the beam is simply supported you should write 2.
7) Define the number of static boundary conditions. You only will be able to use vertical or horizontal forces. The force will be positive if it happen to be in the same direction of the axis. In the case that the beam of Step 1) has two vertical forces you should write 2.
8) When you are ready press the update button. The resulting structure with the boundary conditions will be displayed.
Define the design parameters (Steps 9-10)
Definir los parámetros de diseño (Pasos 9-10)
9) For starters keep default values. For more details visit the Theory behind section.
10) Open the console to watch the progress (CTRL+SHIFT+J in Chrome). Whenever you are ready press the "run program" button. Please wait for the calculations to be completed (depending on the number of elements this could last several minutes). Pressing the "run program" again, without any change, will result in an error (I am currently working to solve this bug). If the model isn't running, please refresh the web page.
Results
Resultados
11) Resulting Strut & Tie Model.
12) Strut-and-Tie Structural Concrete Design according with ACI 318-14.
13) Plot with the double of the strain energy density per iteration.