GATE 2016 CE (CE1) – Question 18
The semi-compact section of a laterally unsupported steel beam has an elastic section modulus, plastic section modulus and design bending compressive stress of 500 cm3, 650 cm3 and 200 MPa, respectively. The design flexural capacity (expressed in kNm) of the section is _________
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Correct answer: 99.9 to 100.1
Explanation
For the stated semi-compact section, use the elastic section modulus Ze. Convert500cm³ to500000mm³ and multiply by200N/mm². Resistance is100000000N·mm=**100kN·m**. The supplied design bending stress already incorporates the stated lateral-restraint effects.