IS 1893 PART-I: 2002 PDF | Download Civil Engineering Code

IS-1893 PART-I : 2002 CRITERIA FOR EARTHQUAKE RESISTANT DESIGN OF STRUCTURES PART 1 GENERAL PROVISIONS AND BUILDINGS

About  IS 1893 PART-I: 2002

This Indian Standard ( Part 1 ) ( Fifth Revision) was adopted by the Bureau of Indian Standards after the draft finalized by the Earthquake Engineering Sectional Committee had been approved by the Civil Engineering Division Council. Himalayan-Nagalushai region, Indo-Gangetic plain, Western India, Kutch, and Kathiawarregions are geologically unstable parts of the country, and some devastating earthquakes of the world have occurred there. 

A major part of peninsular India has also been visited by strong earthquakes, but these were relatively few in number occurring at much larger time intervals at any site and had considerably lesser intensity. The earthquake resistant design of structures taking into account seismic data from studies of these Indian earthquakes has become very essential, particularly in view of the intense construction activity all over the country. 

It is to serve this purpose that IS 1893: 1962 ‘Recommendations for earthquake resistant design of structures’ was published and revised first time in 1966.

As a result of additional seismic data collected in India and further knowledge and experience gained since the publication of the first revision of this standard, the sectional committee felt the need to revise the standard again incorporating many changes, such as revision of maps showing seismic zones and epicenters , and adding a more rational approach for design of buildings and sub-structures of bridges. These were covered in the second revision of 1S 1893 brought out in 1970.

As a result of the increased use of the standard, considerable amount of suggestions were received for modifying some of the provisions of the standard and, therefore, third revision of the standard was brought out in 1975.

The following changes were incorporated in the third revision:

The standard incorporated seismic zone factors (previously given as multiplying factors in the second revision) on a more rational basis.

• Importance factors were introduced to account for the varying degrees of importance for various structures.
• In the clauses for design of multi-storey buildings, the coefficient of flexibility was given in the form of a curve with respect to period of buildings.
• A more rational formula was used to combine modal shear forces.
• New clauses were introduced for determination of hydrodynamic pressures in elevated tanks.
• Clauses on concrete and masonry dams were modified, taking into account their dynamic behavior during earthquakes. Simplified formulae for design forces were introduced based on results of extensive studies carried out since second revision of the standard was published.

Download Now