Calculation of prestressed structure in IBC code

 

15.2

SCIA Engineer 15.2 brings a brand new possibility to calculate prestressed structures for US. SCIA Engineer 15.2 offers new prestressing library according to standards ASTM A416 and ASTM A910.

This development enables users to introduce strand-patterns and tendons with 3D geometry and calculate losses of prestressing. It includes automatic generation of eccentric finite elements for group of tendons (tendons become a part of structural model) and calculation of equivalent load, internal forces and stresses caused by prestressing.

Strand-patterns

Strand-patterns enable the user to quickly and easily model pre-tensioned/post-tensioned concrete members in accordance with their daily practice. The user utilises what is termed borehole and strand patterns in order to input individual strands and adjust their properties such as the initial stress, debonding length, draping distance, type of strand, etc.

Tendons

Post-tensioned or external tendons allow the user to model in 3D, and in a practical way tendons for beams, columns, walls and plates. The user can directly draw an internal or external tendon, or alternatively, he can base the design of a post-tensioned tendon on a library of standard “source” geometries. The source geometry represents a part of the tendon, e.g. the straight part at the end of the tendon, the curved part with the minimum radius above the support or the part at midspan. Source geometries can be merged together to define the practical geometry of the tendon in accordance with a common engineering practice. Tendon geometries can be also easily imported from XML, DWG or DXF files.

During the design, i.e. prior to calculation, the user can quickly review the estimate of losses, which attributes to a quick and practical design. After a successful calculation, all the relative geometry data and tendon properties can be printed in a user-friendly style.

Results

After linear calculation, there is possibility to see standard results of finite element calculation for equivalent load. User has possibility to check internal forces, stresses and deflection of the structure caused by prestressing.