Development of a general calculation methodology to analyse D regions and its application to foundation pile cap analysis software

Strut3D is a software tool resulting from the R&D&I project developed by CYPE with the collaboration of the ‘Instituto de Ciencia y Tecnología del Hormigón’ (ICITECH) of the ‘Universidad Politécnica de Valencia’ (UPV), financed by the ‘Centro para el Desarrollo Tecnológico Industrial (CDTI) and co-financed by the European Regional Development Fund (ERDF).

Strut3D checks (in CYPECAD, CYPE 3D and Foundation elements) foundation pile caps using a general calculation method in which the D regions of the reinforced concrete are analysed using a strut and tie model, in order to guarantee the structural requirements are met in accordance with the standards. The strut and tie model used has been previously validated by a linear finite element analysis.

Additionally, Strut3D provides a graphical output of the results, allowing users to consult them on screen and in the detailed verification reports, which indicate whether or not they comply with the standards. The information provided is of great importance, as it is this information which will be used by the project designer when deciding on and justifying the design.

This R&D&I project is foreseen for international use. Strut3D currently only considers the Spanish EHE-08 concrete design code. More concrete design codes, including the Eurocodes, will be implemented in upcoming program updates.