Published Paper Details:

It is necessary to design structures not only to seismic forces but also to suddenly applied shock waves. This has lead to various structural methodologies for safeguarding a structure against such sudden shock loads besides seismic loads. We generally design structures for loads whose magnitudes are much smaller than those caused due to a shock wave. Hence, such conventional structures cannot perform well under the influence of a sudden shock load, and are susceptible to damage. In the present thesis, a tall building (G+30) of plan dimensions 5m x 5m is considered. Each storey is 3m in height. The column dimensions are varied from 600mmx600mm to 1000mmx1000mm. The analysis is done using ETABS 2016 software. The structure is analyzed for shock loads, where the shock pressures are calculated for various charges and stand-offs using IS: 4991-1968. The non-linear displacement and drift are studied. It is found that the values of non-linear displacements and drifts increased as the charge increases and stand-off distance decreases. Next, the structure is studied for seismic forces. The mode shapes, natural frequencies, modal masses, displacements and drifts are studied. It is found that the displacement values are higher for shock loads (100kg at 50m) than for seismic loads in Zone-V. Pushover analysis was done by certain long hand procedures instead of simply using auto-hinge facility of ETABS software on the 30 storey structure to determine the ductility ratio. The ductility ratio is determined to be 2.194 for column sizes 600x600mm.