{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

338_Mechanics Homework Mechanics of Materials Solution

# 338_Mechanics Homework Mechanics of Materials Solution -...

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 4.58 A concrete beam is reinforced by three steel rods placed as shown. The PROBLEM 4.59 modulus of elasticity is 3 x 10‘ psi for the concrete and 30 x 10‘ psi for the steel. Using an allowable stress of 1350 psi ﬁn‘ the concrete and 20 ksi for the steel, determine the largest allowable positive bending moment in the beam. 4.59 Solve Prob. 4.58, assuming that the width of the concrete beam is increased to 10 in. SOLUTION Loea‘l-e Hue nevi“) axis le-g— - (18.040)(:4-—x,) = o 5)? + 13.0%: x — 252.57g -_— o 'l. = “13.040 + (13.0%) Nina-K2525; : _5 q -n Swim: 42m” % X (2X5) ‘5 2 ' M-x = 3.47! .‘n. ~3L(:o)x3 + nA5(l'-l—x\1= éCIoleiszels+(r8.os0)(8.471)" GI “w.— “3’ Concrei'e: v1: Lo [y] = 5.52mn )6] = 1550 P5" M : 0350M taxman (I ems-52m ”534m? «PL-Iv: Si'eepi n=lo U}? 8.1+?! .‘n 16‘! = 20x10” P“ _ (2oxio‘30357ﬂl : . 3, "a M - (IONS-47'] I433 @610 £6 , Choose 'er. Shoat/Mew quae M= 438.9 K103 flan}. : 438.€ ksp.l1n 7 36.6 kip‘Pi'? ...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online