### Pressure

Basic concepts In inflatable structures, they can be supported by air (large covered spaces of which membrane is hold in place by the overpressure of the interior with respect to the outside) or in the form of pneumatic structural elements inflated to pressures much higher than the previous ones like arches, bars, etc. . WinTess3…

### Actions

In order to analizeĀ a structure, in addition to define and realize that structure, we must refer to some external actions, because otherwise there will be nothing to analyze. The most common actions to be considered in the tensile structures whichĀ can be applied in WinTess3 are: Self weightAs in any structure we must consider the weight…

### Pneumatic Tube

Pneumatic tubeĀ isĀ the form generated by an axis (line in 3D) and a circular cross-section of constant radius.At the moment, WinTess3 finds form of only closed pneumatic tubes. When we use the menuĀ File | NewĀ | Pneumatic tube, the program displays the parameter window of the tube. First of all, we must enter the axis of the…

### Air Supported Rectangle

Outside and inside views of a pneumatic cover for a swimming pool. You can see the cylindrical central section and the corners with a symmetrical pattern. Air supported or pneumatic structures have been popular at certain times (especially in the second half of the 20th century) in the design of economic covers: warehouses, sports fields,…

### Spherical Dome

The spherical domes have been, and remain, one of the simplest forms of tensile structures. The internal pressure produces uniform stress on spherical surfaces, and this is the main reason why theyĀ have been preferred. Other reasons, such as aesthetics, simplicity in manufacturing, etc., have also served to popularize this type of form. When we use…

### Pneumatic Structures and Internal Pressure

One of the forms of pretensioning a membrane is to overpressure of the interior air. When a membrane is subjected to an air pressure has a certain curvature, this pressure causes the membrane a stress that is proportional to the curvature. So, if itās a membrane of cylindrical shape, with a certain radius of curvature…

### Creating a Cushion

With the advent of ETFE in the world of lightweight construction, cushion creation has become a common strategy. A cushion is a set of two membranes: one upper and one lower. Therefore, the best way to approach this creation in WinTess3 is to create the two separate membranes and then put them together. Suppose that…