Comparative Study of Lateral Load Resisting Systems for Irregular Shape of Building for Different Soils
Keywords:ETABS 15.0.0, Lateral Load Resisting Systems, Shear Wall, Bracing, Flat Slab, Lateral Displacement, Base Shear, Storey Drift, Time Period.
— For earthquake resistant design the normal building should be able to resist minor, moderate, sever
shaking. In the circumstances of the building, simple shape configuration building transfer the earthquake force in the
direct path to the base while in complex shape building, the load transferring path is indirect which leads to generation
of stresses at the corners. Structure designers need to design and build a structure in which the damage to the structure
and its structure component by earthquake is minimized. From the past studies and structure designer’s researches, they
found various lateral load resisting systems; like Shear wall systems, Bracing systems, Flat slab systems, etc. Here 15
Storey T-Shape building is considered for analysis. In present study five different models are used for analysis, I) Bare
Frame, II) Moment resisting frame with steel bracings at corners (MFBR), III) Moment resisting frame with RC Shear
wall at corners(MFSW), IV) Flat slab with steel bracings at corners(FSBR), V) Flat slab with RC Shear wall at
corners(FSSW). All models analyzed for three types of soils, I) Hard Soil, II) Medium Soil, III) Soft Soil as per IS 1893
(Part-1):2002. All the models were analyzed using Finite Element Method based software ETABS 15.0.0 subjected to
lateral and gravity loading in accordance with IS provisions. The main parameters considered in this study to compare
the seismic performance of different models for linear static analysis are; Top storey displacements, Storey drift ratios,
Storey shears and for dynamic analysis are; Torsional moments, Time Period and Response Spectrum.