What is the need of seismic retrofitting in Construction ?

 

The seismic design of a building or other structure is the process of evaluating its vulnerability to ground shaking, and increasing its resistance to it. A properly designed building will prevent damage due to strong ground motions. This can be accomplished by providing the building with adequate strength in terms of mass, stiffness and damping. The effective use of materials has also been emphasized in seismic codes as well as standards such that structures are made more rigid and hence reduce their ability to deform after being struck by an earthquake wave. Seismic retrofitting means strengthening a previously existing building with respect to its compliance with current structural requirements, or upgrading it so that it complies with those requirements. It involves reinforcing an existing structure with additional steel bracing, stanchions, or cross ties to improve its seismic resistance. Seismic retrofitting can be performed on any type of property including residential, commercial, institutional and industrial properties Seismic retrofitting Service in India.

How does seismic retrofitting work?

Seismic retrofitting can be defined as the process of strengthening a structure to withstand seismic hazards where the existing structure is either old or has a degraded condition. The procedure to perform seismic retrofitting aims at raising the level of protection by reinforcing the existing structure by making it stiffer, or by adding damping. Depending on the type of building, the retrofit can be done at the same level where it was originally built, or in another level above the original one. The first stage of seismic retrofitting is to identify the level of seismic risk. This can be accomplished by using a computer-generated virtual model, or by obtaining a ground motion record from an actual test. This model will show the pure duration and magnitude of the ground motion that could affect the structure. Next, one can determine if the existing structure has the capacity to withstand the seismic hazard. After that, one can design the seismic retrofit to ensure that the new structure is able to withstand the seismic hazard.

Benefits of Seismic Retrofitting in Construction

- Increased soundproofing - Soundproofing is the process of reducing sound transmission through walls, ceilings, and floors. This is usually achieved by installing dense, sound-absorbent material. However, in order to achieve the desired effect, soundproofing materials have to be installed at a particular level and thickness. If the new structure supports higher building levels, the soundproofing can be effectively transferred to it. Therefore, seismic retrofitting can be very useful in increasing the soundproofing of a building. - Improved health - When a building is built to withstand certain seismic conditions, the conditions will vary depending on the geography and the location of the structure. If the existing structure is old or degraded, it cannot withstand the varying conditions as they change over time. Therefore, seismic retrofitting will increase the lifespan of the building. - Reduced maintenance and utility bills - The retrofit of a building can also reduce maintenance costs because it will last longer and require less maintenance. In addition, the utility bills can be significantly reduced when a building is newly retrofitted. - Stronger structure - During a strong earthquake, the structure of the building might deform or break. This can happen because the existing structure might not be able to withstand the strong ground motion, or it might have been designed to sustain only a certain level of ground motion. Therefore, during a strong earthquake, the new, stronger structure might be able to withstand the impact.

Steps for seismic retrofitting in construction

- Design of new structure - The design of the new structure should consider the need for seismic retrofitting, the level of the existing structure, and the type of construction. The design should also ensure that the new structure has the capacity to withstand the seismic hazard. - Design of new structure - The design should also ensure that the new structure has the capacity to withstand the seismic hazard. - Design of new structure - The design of the new structure should consider the need for seismic retrofitting, the level of the existing structure, and the type of construction. The design should also ensure that the new structure has the capacity to withstand the seismic hazard.

Safety precautions during seismic retrofitting in construction

- During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure that the new structure is designed for seismic resistance. - During the design process, one should make sure

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