Abstract
The Buildings on the hills differs from other buildings constructed in plain terrain. Each floor of building steps back towards the hill slope and at the same time buildings may have designed with setbacks configuration also. Buildings constructed in hilly areas are more vulnerable to seismic environment. This study is on generating a 3D analytical model of multi-storey buildings analyzed using structural analysis tool ‘ETABS” to study the effect of varying height of columns due to sloping ground and the effect of bracing at different positions in a different configuration of the building during an earthquake. Seismic analysis has been done using the response spectrum method. The performance of the buildings on the sloping ground is highly vulnerable to earthquake on each storey level. Buildings resting on sloping ground with step back configuration are compared to buildings resting on the plain ground with same type load applied to each of the structure. From this study entire modelling the behaviour of normal ten storey building, step back, set-step back ten storey building is studied, it is found that the displacement and base shear value shows the performance of step back building and set-step back building. This is research also focus on effective placement of bracing with different types and in different positions. The displacement values show better performance by providing X bracing in the lateral direction.
Highlights
Buildings constructed in sloped terrain are more vulnerable to earthquake and other lateral forces
Description of the structure The structure is placed in sloped terrain is modelled with three different configuration compared with bracing in different position with same loads and components
Arround four different types of bracing named as X, V, Inverted –V and Eccentric bracing are placed in these six different configuration
Summary
Buildings constructed in sloped terrain are more vulnerable to earthquake and other lateral forces. There are around three types of configuration they are normal structure, step back structure and set- step back structure. These three configurations are used to be constructed in sloped terrain and hilly regions. Dynamic character of the structure changes because of variation in the column height. The dynamic characteristic of the building in hills and sloped terrain differs from the plain structure.Bracing which is used to resist lateral load is being provided in a different position and four different bracing are used to modelled and analyzed. The displacement and base shear value of the structure are compared for the results for three models with different bracing in different positions
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