IS 13935 : 2009 Seismic evaluation,Repair and Seismic Strengthening of Buildings - Guidelines

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This standard covers the selection of materials and techniques to be used for repair and seismic
strengthening of damaged buildings during earthquakes. It also covers the damageability assessment and retrofitting for upgrading of seismic resistance of existing masonry buildings covered under
IS 4326 and IS 13828.

The repair materials and techniques described herein may be used for all type of masonry buildings
and construction.

The provisions of this standard are applicable for buildings in seismic Zones III to V of IS 1893 (Part 1). These are based on damaging seismic intensities VII and more on M. S. K. Intensity scales. The scheme of strengthening should satisfy the requirements stipulated for the seismic zone of IS 1893 (Part 1), building categories of IS 4326 and provisions made in this Code and in IS 13828 for low strength masonry building. No special seismic resistance features are considered necessary for buildings in seismic Zone II, but the important buildings in this Zone may also be considered for upgrading their seismic resistance.

The suggested reinforcing of horizontal and vertical seismic belts in this standard follows IS 4326
requirements of horizontal seismic bands and vertical bars at critical sections. For special buildings having larger span and heights beyond the dimensions considered in IS 4326 and in this standard, special analysis may be carried out at the responsibility of the specialist.

It covers the selection of material and techniques to be used for repair and seismic strengthening of damaged buildings during earthquakes and retrofitting for upgrading of seismic resistance of existing buildings. This code lays down guidelines for non-structural/architectural as well as structural repairs, seismic strengthening and seismic retrofitting of existing buildings. The provisions of this code are applicable for buildings in seismic zones III to V of IS 1893 : 1984, which are based on damaging seismic intensities VII and more on MSK scales.

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