Correct Answer - Option 4 : None of the above
Explanation:
The acceptable limit for the safety and serviceability requirements before failure occurs is called a “limit state.
There are two limit states:
Limit state of Collapse
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Limit State of Serviceability
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It considers imaginary behavior of structure at the time of the collapse
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It considers the actual behavior of the structure underworking or service loads.
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The various limit state of collapse as per IS 1343: 2012 are:
1. Flexure
2. Compression
3. Shear
4. Stability
5. . Torsion
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The various limit state of serviceability as per IS 1343: 2012 are:
1. Cracking
2. Deflection
3. Maximum compression
4. Vibration
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Reference: IS 1343 - 2012 (Page 42:, Clause 23)