Seismic retrofitting is among the modification techniques of existing structures to make them resistant to:
- Seismic activity,
- Ground motion, or
- Soil failure due to earthquakes
With a clear understanding of seismic demand on structures along with the recent experiences of huge earthquakes near urban centers, the need for seismic retrofitting is acknowledged.
Earthquake engineering is carried out for the seismic retrofit of structures, which involves alteration of existing structures to get resistance to seismic activities or soil failures due to earthquakes.
Retrofit along with the seismic equipment for sale is widely performed; especially in the active seismic zones.
Which Field Does Seismic Equipment Belong to
Seismic retrofitting is a construction engineering field that entirely focuses on the modification of existing structures to improve their capacity to resist earthquakes. It is accomplished by the inclusion of structural improvements, which may prevent people, the building, and the equipment from destruction by seismic waves.
In seismic zones, seismic retrofitting might be essential for tunnels, bridges, buildings, and overpasses. While new construction may need compliance to seismic standards.
Where Can Seismic Equipment be used
Seismic retrofitting can be executed on:
- soft story
- concrete masonry,
- concrete tilt-up construction, and
- unreinforced masonry
Soft-story buildings are multi-story buildings with wide-open space and in concrete tilt-up construction. Masons fill concrete in the panels that form the structure of walls. Since the concrete tilt-up walls are generally heavy, seismic retrofitting might be needed.
The motive behind the concrete tilt-up retrofit is to save the separation of the building walls from the roof.
Classifications of Seismic Retrofitting
There are various categories of seismic retrofitting. Also, their nature depends on the purpose of retrofit execution. The main type of retrofit is the public safety retrofit that involves structural reinforcement for human life safety through some degree of injury.
Such retrofit is done on structures that are fairly inexpensive and for which an entire rebuild is not needed. A lower level retrofit might be chosen to ensure the structure’s endurance from the earthquake with some repairs required after the earthquake. A geophone is also a crucial factor for the repair of a structure’s damage after an earthquake.
Extensive retrofit can become necessary for buildings that are crucial due to historical, cultural, or other reasons. Mostly, seismic retrofit is normally performed on structures that are quite high and are unsafe from earthquake vibration frequency.
There are some techniques applied for the seismic retrofitting of structures. A few of them include the use of baffles and absorbers to make the structure earthquake-proof.