Question
Download Solution PDFIf the Moment 'M' is carried by flanges only, then the economical depth 'd' of girder is given by __________ Where, 'fy' is yield strength of steel and 'Af' is the net area of tension flange.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Assume the girder is given below and the moment is taken only by the flange
Moment (M) taken by flange only;
\(M=f_y× b_f× t_f× d\)
Where bf = width of flange, tf = thickness of flange, d = economical depth of girder, fy = yield strength of steel, and bftf = As = net area of tension flange.
M = fyAf × d
\(d={M\over f_yA_f}\)
Hence option (4) is correct.
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