What is seismic retrofitting

What is seismic retrofitting Seismic retrofit is a field of construction engineering that focuses on the modification of existing structures to enhance their capability to resist earthquakes. Seismic retrofitting is achieved by the inclusion of structural improvements that may prevent the building, people, and the equipment from damage by seismic waves. In seismic zones, retrofitting may be essential for the bridges, overpasses, tunnels, and buildings, while the new construction would require compliance to seismic standards. Seismic r etrofit may be executed on concrete masonry, un reinforced masonry, soft story, and concrete tilt-up construction. Soft story building is a multi-story building with abundant open space, and in concrete tilt-up construction, concrete is filled in the panels that form the walls of the structure. Since the concrete tilt-up walls are normally heavy, their seismic retrofit may be necessary. The motive for the concrete tilt-up retrofit is to prevent the separation of the roof fr om the building walls. There are numerous techniques that are being used for the retrofit of structures, and their selection is based on the objective of retrofit, type of structure, soil conditions, and the expenditures involved. Retrofitting of buildings may reduce the earthquake damage by suitable structural modifications, but no technique will completely eliminate the risk of seismic waves. Reinforcement of the buildings by the use of girders and trusses is normally implemented to make the buildings safe. Base isolators are utilized to decouple the structure from the shaking ground, thus achieving seismic vibration control. Supplementary dampers minimize the structure resonant effects, increase the energy dissipation, and reduce the displacement of structures. Other retrofit techniques include the use of absorbers and baffles to make a building safe from an earthquake 1

What is seismic retrofitting

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