The design of the multi-storeyed buildings are primly depends on the lateral loads like earthquake and wind forces acting on them. It is uneconomical to design the whole structure to resist these lateral forces. Hence lateral force resisting systems such as moment resisting frames, bracing systems, shear walls, outriggers and recently diagrids have been introduced. This paper presents the comparative study on the seismic behaviour of diagrid structure and shear wall structure. A diagrid structure and a shear wall structure of 16 stories each are designed with the same design loads and are analysed using response spectrum method. The seismic performances of both the structures are compared with one another. The results shows that the use of diagrids in the structure will reduces the displacements, drifts and storey shear whereas implementation of shear wall in the structure increases the natural time period and reduces the vibration (storey acceleration) of the building caused due to seismic activity.

In this paper, the dispersion of solute matter in a Jeffrey fluid flow through a porous medium in a peristaltic channel has been investigated under the influence of slip boundary conditions. Long wavelength approximation and Taylor's limiting condition are used to obtain the average effective dispersion coefficient in both the cases of homogeneous and heterogeneous chemical reactions. The effects of various pertinent parameters on the effective dispersion coefficient are discussed. Average effective dispersion coefficient increases with amplitude ratio. That is, more dispersion in the presence of peristalsis. Further, the average effective dispersion coefficient increases with the permeability parameter and the slip parameter; but decreases with the Jeffrey number, homogeneous / heterogeneous chemical reaction rate parameter.