IS 1893 (Part 1) : 2016 - Criteria For Earthquake Resistant Design Of Structures - General Provisions And Buildings

The provisions of this standard are applicable for design of structures like parking structures, security cabins and ancillary structures taking into account appropriate earthquake effects as per this standard. This standard is also applicable for design of temporary elements, such as scaffolding and temporary excavations.

This standard does not deal with construction features relating to earthquake resistant buildings and other structures. For guidance on earthquake -resistant construction of buildings, reference may be made to the latest revisions of the following Indian Standards:  IS 4326, IS 13827, IS 13828, IS 13920, IS 13935 and IS 15988.

The provisions of this standard are applicable even to critical and special structures, like nuclear power plants, petroleum refinery plants and large dams. For such structures, additional requirements may be imposed based on special studies, such as site-specific hazard assessment. In such cases, the earthquake effects specified by this standard shall be taken as the minimum.

The standard includes detailed provisions on general principles and design criteria for earthquake hazard assessment such as  load combinations,  design acceleration spectrum to be used for  determining design seismic force; detailed provisions on buildings  covering therein building configurations, plan irregularities and  vertical irregularities of buildings that needs to be addressed in the planning, calculation of the  estimated lateral force  on buildings  based on suggested factors including on response reduction factor and importance factors for buildings, determination of approximate fundamental transnational natural period of  buildings with basements, step back buildings  and  buildings on hill slopes,  reinforced concrete frame buildings with un-reinforced masonry infill walls and for those  with  open  storeys,  flat slab structures,  permissible deformation limits,  procedure for evaluation of liquefaction potential of soils, etc. Various maps of India depicting seismic zonation, epicentres of past earthquakes, principal tectonic features, principal lithological groups have also been provided.

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