Abstract
Numerous studies were contemplated on the structures with distinctive structural configuration and ample amount of work is currently being performed through the investigation of the response of individual behavior of shear walls and bracings by varying configurations and their material properties. Seismic design philosophies had mentioned firmly that a structure must accomplish Life Safety and Performance Level for both reinforced concrete and steel structures. This study is anchored on prevailing lateral load resisting system which is virtuous but not adequate to retain vigorous ground motion or acceleration. To overwhelm this problem, an attempt was made to familiarize a new lateral load resisting system formulated by the amalgamation of two different existing lateral load resisting systems, specifically shear walls and bracings. The hybrid structural system embraces two distinctive lateral load resisting techniques, shear walls, and bracings for moment-resisting frame. A numerical finite element study was carried out by the linear dynamic method on the response of structure subjected to seismic condition and an optimal configuration of the different structural patterns is assured by using numerous possible patterns of a hybrid structural system using finite element-based software. The criteria contemplated for study including time period, base shear, overturning moment, story drift ratio, and story displacement are compared with different models and the optimal structure is concluded based upon the recital. The comparative results revealed that there is a reduction noticed in the fundamental time period, and story displacement, where as there is negligible increment in base shear and overturning moment for the hybrid structural system as compared to other configurated models.
Highlights
The shear walls and bracings both are tremendous techniques that can be implemented in the building to escalate seismic enactment
When hybrid structure type-1 is contrasted over overturning moments, it stakes the base moment by a peak value of 62.1%,which is below par when compared to buildings with shear walls as 47.3%
The base shear increases by the shear wall as compared to the bare frame by 16.4% and hybrid type-1 increases it by 22.8% and steel bracings show the negligible contribution to the increment as it is only 1%
Summary
The shear walls and bracings both are tremendous techniques that can be implemented in the building to escalate seismic enactment. The seismic study embraces various parameters (story drift, story displacement, overturning moment, and time period of the building) that should be based and checked upon different codes before verifying a structure is safe. The hybrid structural system enhances the efficiency of the model by reducing story displacement and story drift while base shear and overturning moment show minimal increments, which is acceptable. Comparing the hybrid structural system with the shear walls, story drifts and displacements were reduced but the base shear and overturning moment increased in case of the shear wall which is overwhelmed by hybrid structural system. Further steel bracings are advantageous as no such drastic increment is noticed in base shear and overturning moment but their efficiency to reduce story drifts and displacements is less. Hybrid structural system fulfills both the conditions, i.e. reduction of story displacement and story drift by controlling the base shear and overturning moment
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