CYPE 3D

Version 2025.d includes the option to select the calculation mode of the pile sinking resistance in the module "Piles I: Calculation of sinking load":

• By indicating the "Geotechnical parameters" (available since previous version -2025.c)
  
  
• By indicating the "Allowable bearing pressures"(implemented in version 2025.d)
  This option is used to calculate the pile considering the allowable bearing pressures defined in the geotechnical study. This feature also introduces the possibility to include the effect of "negative friction" by entering negative values.
  
  

This selection is made in the "Advanced setup" dialogue box (Job menu > General data > "Foundation elements with external fixity" option > "Advanced settings" option).

In version 2025.d, the CYPECAD, CYPE 3D and Foundation Elements programs incorporate the lateral stability analysis module to facilitate the design of deep foundations subjected to significant lateral forces.

This module complements the structural check of reinforced concrete piles (if your licence includes the "Piles II: Structural check" module), by allowing the checking of pile sections and reinforcements under various loading scenarios. For this purpose, the soil characteristics are integrated by means of p-y curves, and the non-linear behaviour of the soil is considered in the analysis.

The analysis is carried out using the OpenSees© analysis engine and is based on a finite element model where the behaviour of the soil is assimilated to a series of non-linear springs. The stiffnesses of these springs are determined according to the geotechnical parameters previously defined in the specifications of the soil layer.

The forces and displacements obtained at each point can be viewed on screen and exported to a CSV file. Furthermore, if your license includes the "Piles II: Structural check" module, the calculated forces are used to check the reinforcement of the pile section in accordance with the applicable codes.

The program can be used to easily define the section of the piles and their reinforcement and to check their resistance to the forces transmitted by the pile cap to the pile head. If the lateral stability analysis is carried out, the stresses obtained from this analysis are also taken into account. The lateral stability analysis is part of the other pile module implemented in this version "Piles III: Lateral stability analysis".

In the "General data > Foundation elements with external fixity" panel, some options have been implemented that allow considering minimum values of the bending moment and axial force to be considered, as well as setting the buckling length of the pile for the calculation. These values can also be modified for each pile cap individually.