05-04ChapGere.0010

# 05-04ChapGere.0010 - shear force V that may act on the beam...

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

Solution 5.10-9 Beam with an overhang SECTION 5.10 Shear Stresses in the Webs of Beams with Flanges 347 s allow 5 18 ksi t allow 5 11 ksi Select a beam of S shape R A 5 7400 lb R B 5 14,800 lb Maximum shear force: V max 5 10,000 lb at x 5 12 ft Maximum bending moment: M max 5 22,820 lb-ft at x 5 6.167 ft R EQUIRED SECTION MODULUS From Table E-2: Lightest beam is S 8 3 23 I 5 64.9 in. 4 S 5 16.2 in. 3 b 5 4.171 in. t 5 0.441 in. h 5 8.00 in. h 1 5 8.00 2 2(0.426) 5 7.148 in. M AXIMUM SHEAR STRESS (Eq. 5-48a) [ ok for shear Select S 8 3 23 beam 5 3340 psi 6 11,000 psi t max 5 V max 8 It ( bh 2 2 bh 2 1 1 th 1 2 ) S 5 M max s allow 5 (22,820 lb-ft)(12 in. / ft) 18,000 psi 5 15.2 in. 3 A B C P = 3000 lb q = 1200 lb/ft 12 ft 4 ft 8 ft R A R B x Problem 5.10-10 A hollow steel box beam has the rectangular cross section shown in the figure. Determine the maximum allowable
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: shear force V that may act on the beam if the allowable shear stress is 36 MPa. Solution 5.10-10 Rectangular box beam 10 mm 200 mm 20 mm 20 mm 10 mm 450 mm t allow 5 36 MPa Find V allow t 5 2(10 mm) 5 20 mm I 5 1 12 (200) (450) 3 2 1 12 (180)(410) 3 5 484.9 3 10 6 mm 4 V allow 5 t allow It Q t 5 VQ It 5 1.280 3 10 6 mm 3 5 273 kN 5 (36 MPa) (484.9 3 10 6 mm 4 )(20 mm) 1.280 3 10 6 mm 3 V allow 5 t allow It Q Q 5 (200) ¢ 450 2 ≤ ¢ 450 4 ≤ 2 (180) ¢ 410 2 ≤ ¢ 410 4 ≤ A-PDF Split DEMO : Purchase from www.A-PDF.com to remove the watermark...
View Full Document

## This note was uploaded on 09/20/2009 for the course COE 3001 taught by Professor Armanios during the Spring '08 term at Georgia Tech.

Ask a homework question - tutors are online