Lab_9_solution - UNIVERSITY OF CALIFORNIA BERKELEY Instructor:Khalid M Mosalam Department of Civil and Environmental Engineering CE123 Design of RC

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UNIVERSITY OF CALIFORNIA, BERKELEY Instructor:Khalid M. Mosalam Department of Civil and Environmental Engineering CE123: Design of RC Structures Structural Engineering, Mechanics and Materials (SEMM) Spring Semester, 2009 CEE 123 Laboratory No. 9 (Solution) Problem 6.1 f '’ c =4000psi f y =60,000psi b=12in l=18.5ft h=23in Æ d=20.5in A s =4#8=3.16in 2 Æ E s =29000Ksi n=8 j=1-k/3=0.878 At service load: w s =3.96K/ft Æ M s =3.96*18.5 2 /8=169kip-ft f s =M/A s jd=35.7Ksi Take edge spacing (clear cover) to be C c =2in Equation 6.3: s=(540/f s )-2.5C c =(540/35.7)-(2.5*2)=10.1in Æ bar spacing=[12-(2*2)-(2*0.5)]/3=2.333in<10.1in Æ OK!
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Problem 6.2 f '’ c =4000psi f y =60,000psi b=12in l=18.5ft h=23in Æ d=20.5in A s =2#10=2.54in 2 Æ 0103 . 0 5 . 20 * 12 54 . 2 = = ρ E s =29000Ksi n=8 k=0.332 j=1-k/3=0.8893 At service load: w s =3.96K/ft Æ M s =3.96*18.5 2 /8=169kip-ft f s =M/A s jd=43.8Ksi Take edge spacing (clear cover) to be C c =2in Equation 6.3: s=(540/f s )-2.5C c =(540/43.8)-(2.5*2)=7.3in Æ bar spacing=[12-(2*2)-(2*1.27/2)] =6.73in<7.3in Æ OK!
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Problem 6.5
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This note was uploaded on 02/27/2011 for the course CE 123 taught by Professor Mosalam during the Spring '09 term at University of California, Berkeley.

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Lab_9_solution - UNIVERSITY OF CALIFORNIA BERKELEY Instructor:Khalid M Mosalam Department of Civil and Environmental Engineering CE123 Design of RC

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