CEE461_HomeworkSet5_02062019.pdf - CEE461 – Reinforced...

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CEE461 – Reinforced Concrete I University of Illinois at Urbana-Champaign Gurfinkel and Asem Spring 2019 Name:____________________________ © 2019 1 Homework Set 5 Follow Homework Assignment requirements in the Syllabus. Due date: Thursday, February 28, 2019 Minimum area of steel reinforcement Problem 1. For the RC flanged cross-sections in Homework 4 (i.e., AA and BB), calculate the minimum required area of tension steel reinforcement (A s,min ) based on ACI 318-14. Do the cross-sections reinforced as shown in AA and BB comply with the code requirements? Analysis of unconventional RC sections Use rectangular Whitney’s stress block. Show annotated stress and strain distributions including internal forces in both problems. Use the iteration method to solve both problems. Problem 2. Consider a vertical column with the circular cross section shown in Page 109 of the Class Notes (i.e., Section #2) except it is reinforced with 8 #8 bars and #4 spiral reinforcement at a 3 in. pitch. Calculate its bending moment strength (M n
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