SEISMIC BEHAVIOR OF TUNNELFORM BUILDINGS

Abstract

Tunnel fonTi buildings are shear wall dominant structures with reinforced concrete walls as load carlying members, both vertically and laterally, without any beams or columns. These are mostly used in regions where there is a requirement of repetitive bays, speed in construction, economy and where strong ground motion are more frequent in occurrence. These structures have proven to show good performance during earthquakes in Turkey. Even though these buildings offer such good performance, seismic codes do not provide proper design guidelines for these structures exclusively. Also these buildings are tall structures and mostly involve an unsymmetrical plan due to the location of stairs or lifts. Hence a dynamic analysis is required to know the exact behavior of the structure. A detailed 3-D model of a 21-storey tunnel form building has been completed using the FEM software ABAQUS 6.13. The time period of the building was found to match with empirical relations. The modified compression field theory was used to include the non-linearity of the materials. The strain occurring in the structure has been measured using the damage parameter in both tension and compression and, the same has been reported