Seismic Analysis of High Rise Building with is Code 1893: A Review

Recommendations provided by seismic codes help the designer to improve the behaviour of structures so that they may withstand the earthquake effects without significant loss. Seismic codes are unique to a particular region or country. They take into account the local seismology, accepted level of seismic risk, properties of available materials, methods used in construction and building typologies. Further, they are indicative of the level of progress a country has made in the field of earthquake engineering and property. Most of the recommendations of IS codes are based on observation during past earthquakes as well as experimental and analytical studies made by scientists, engineers and seismologists. In India, the first seismic code namely IS 1893 (Criteria for earthquake resistant design of structures) was published in 1962. As due to Analysis of performance of structures during past seismic events and Efforts put by researchers, considerable advancement have been made over the years in earthquake resistant design of structures, and seismic design requirements in building codes have steadily improved. Therefore, the seismic code needs revision from time to time. IS 1893-2002 has been revised in year 2002 after the gap of 18 years (IS1893-1984). Now this is again revised as IS 1893-2016. The building designed as per the earlier version of the code may be checked for recommendations made by the revised code. Such comparison is to be carried out to establish whether existing buildings designed by earlier version are safe for revised recommendations also. Buildings known to possess structural deficiency should be retrofitted to withstand expected design earthquake vibrations. Tall structures and buildings are now adopted in India. Many major cities near to the coastal area comes under the live seismic zone, it creates problem for high rise multistorey buildings. Analysis of such a complex structure are too hectic& time consuming. It is tried since long time to find the solution to this problem. Wind& seismic analysis of the structures can be done by the advance software STAAD Pro, SAP or ETABS. Structural Analysis and design are predominant in finding out significant threats to integrity and stability of a structure. Multi storied structures, when designed, are made to fulfil basic aspects and serviceability. Since Robustness of structure depends on loads imposed, it is critical. Softwares are developed such as STAAD PRO, ETABS& SAFE, and SAP to solve typical problems with ease of use. The design results using softwares can be obtained and compared. The building performance under seismic depends critically on its overall shape, size and geometry. Earthquake resistant design of buildings depends upon providing the building with strength, stiffness and inelastic deformation capacity. The building slenderness ratio and the building core size are the key drivers for the efficient structural design.