Parametric Analysis on Buildings with Connecting Corridors
Abstract
The architectural design of modern buildings has been highly integrated and multi-functional. Connected highrise structures, which comprise of main towers and corridor in between at a certain height falls under the category of irregular building structure system. This thesis presents a study on the various buildings with connecting structures, under lateral loading conditions such as the seismic loads. The software ETABS was used for modeling the structure. Linear static analysis and linear dynamic analysis was conducted to analyse the models. For seismic loading, the parameters such as storey displacements, storey drifts, overturning moment, base shear, axial and bending moments in the corridor beams are studied. It is understood that each building behaved differently under seismic loads.
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Introduction
Earthquakes has always been a major hazard to human beings as well as structures which serve humans important facilities. Seismic analysis is the branch of structural analysis which calculates the response of structures to earthquakes. Double tower connected building is a kind of complicated structure form with two single towers as major structure which are connected by linkwork such as corridors. The connecting body is provided at a certain height and forms an irregular building structural system. More and more connected structures with long- span corridors have been constructed during the years.
The connection provide convenience for communication among different towers and is an important means of escape when one tower suffers calamities like fire. Static performance of high rise connected structure is simple and mature. Location of connection will change the dynamic characteristics of tall buildings and can also change the response caused by earth quake, wind or other loads. The behaviour of the structure as well as the members of the corridor depends on the type of connection used for the corridor
Conclusion
Compared with the ordinary buildings, the characteristics of connected buildings are complex and changes with the connection location. These high and flexible structures have large movements under lateral forces like earthquakes and winds. The effort of the connecting corridor location changes the structure behaviour in terms of displacement, drift, overturning moment, base shear, axial force and bending moments. The results indicate that the horizontal displacement and drift under seismic loading in Y direction is larger than the displacements and drifts in X direction. Overturning moment depends on location and span of the corridors. The effort to maximum base shear is larger in X direction than Y direction. The above results provide references for design and for further study.