Ayia Napa Marina Tower: Structural Challenges
Session: E: Structural Challenges: Designing for Endurance
Managing Principal, A. J. Pericleous
The Ayia Napa Marina Tower is a high-rise building of 28 levels, with a maximum height of about 120 meters. The building is sited on the beachfront on the east coast of Cyprus, and it combines the high seismicity of the eastern Mediterranean region with an innovative architectural twisting design: a relative rotation of 1.6 degrees per floor, with inclined columns. The fact that the columns are inclined creates torsional stresses to the building due to the imposed gravity loads, which in turn generate creep effects to the concrete mass, and rotational displacement to the building's floors.
Laboratory tests to identify the exact modulus of elasticity (MoE) were done for all concrete grade mixes, which showed that the MoE was considerably lower than what Eurocodes required, because of the physical characteristics of locally sourced aggregates. Due to the twisting effect of the building, a construction stage analysis was carried out to identify the long-term rotational displacement of the building, taking into consideration and comparing different concrete creep models such as CEB-FIB MC2010 and GL2000.
Through this study, the displacements and rotation of the building were estimated for various time periods critical to the building’s life span, and were subsequently used to plan the various tolerances required for elevators, walls, façades, etc. Α monitoring plan was carried out during construction. The survey monitoring results were evaluated, comparing actual against estimated displacement and rotation of the building.