- Seismic Design Category
- Requirements Category
- Seismic Risk Category
- Provisions Category
The Correct Answer:
A. The Provisions consider a building’s seismicity and its Seismic Use Group and assign it to a Seismic Design Category in order to define its seismic safety requirements.
The provisions utilize Seismic Design Categories to identify the classification of seismic response for which a building should be designed. The Seismic Design Categories are hazard-free and complement the structure’s significance.
The design category of a particular structure is established to utilize a table that connects design acceleration to the Seismic Use Group ratings of a building. There are around six Seismic Design Categories:
- Seismic Design Category A is responsible for representing the regions where the motions in the ground are very minute.
- Seismic Design Category B represents the structures in the regions where the ground shaking possibility is moderate. This category uses Group I and II structures that must be designed by determining the NEHRP Provisions Maps 1.
- Seismic Design Category C represents the structures in the regions where the ground shaking possibility is moderate.
Sometimes they can also be severe, and that is why the non-structural components are undertaken to design for the seismic resistance. The group III structures are included along with Group I and II structures.
- Seismic Design Category D represents the region with a high possibility of experiencing destructive ground shaking. This category includes Groups I, II, and III, and severe limits are put on some structural systems. The dynamic analysis technique places a vital role in the designing process and is also used in analyzing irregular structures.
- Seismic Design Category E represents regions with a high possibility of major active faults.
- Seismic Design Category F represents regions with severe limitations, irregularities, and improper design methods. The provisions generally trigger the maximum area, which has a very high earthquake spectral response, for a very long period.
See all Questions of IS-8.A