Analysis of Different Forms of Tube in Tube Structures Subjected to Lateral Loads
Mohan K T, Rahul Y, Virendra Kumara K N
Tube-in-Tube, Core wall, Earthquake load, SAP 2000.
Over the past few years tubular structures are becoming a common feature in tall buildings. Tube in tube structures is particularly suitable for all tall buildings. A tube-in-tube structure Comprises of a peripheral framed tube and a core tube interconnected by floor slabs. In order to Study the seismic performance of tube-in-tube structures different models were developed in SAP 2000 software by varying the geometry of tubular structures. In which the horizontal slabs and beams connecting vertical elements are assumed as continuous connecting medium having Equivalent distributed stiffness properties. Response Spectrum analysis is used for analysis of different type of tubular structures and the output of the models are evaluated to have a comparative study of their seismic performance. From the analysis result we got square geometric plan of tube in- tube structure was more resistant to lateral load compare to square geometric plan of tubed frame structure and the tube-in-tube models of rectangular, triangular and hexagonal geometry are modeled and compared to tube-in-tube square geometry of structure. From the comparison we got triangular structure have more displacement, drift, time period and got less base shear for zone-V and zone-II so we can consider the structure is more vulnerable compare to other geometry of structures.