Dr Krishna has made valuable contribution in the field of Earthquake Engineering. He has contributed original ideas in the design and construction of earth quake resistance structures, leading to the evolution of economic design and construction practices. Some of his noteworthy contributions in this field are : (i) methods for strengthening brick buildings to resist earthquake forces, (ii) design, construction and installation of structural response recorders and accelerographs in India to collect seismic data for the design of structures, (iii) earthquake resistant design of water towers and other structures of post-earthquake importance, (iv) earthquake resistant design of dams, bridges and other major structures, and (v) the concept of iso-acceleration lines indicative of earthquake forces in epicentral tracts for the study of distribution and attenuation of energy from earthquake source.