Question

According to IS 1893 (Part-1):2002, the zone factor for seismic zone III is equal to
1. 0.10
2. 0.16
3. 0.24
4. 0.36

Answer 1

Correct Answer - Option 2 : 0.16

Explanation

According to IS 1893 (Part-1):2002 Clause 6.4.2

Seismic Zone	II	III	IV	V
Seismic Intensity	Low	Moderate	Severe	Very Severe
Zone Factor (Z)	0.10	0.16	0.24	0.36

 As per CI. 6.4.2 of IS 1893, The design horizontal seismic coefficient Ah for a structure shall be determined by the following expression:

\({A_h} = \frac{{ZI}}{{2R}}\frac{{{S_a}}}{g}\)

Where, Z = Zone factor

I = Importance factor, depending upon the functional use of the structures, characterized by hazardous consequences of its failure, post-earthquake functional needs, historical value, or economic importance

R = Response reduction factor, depending on the perceived seismic damage performance of the structure, characterized by ductile or brittle deformations.

Sa/g = Average response acceleration coefficient