RCD Exam 1 PDF
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This document includes exam problems on reinforced concrete design. Three problems covering column design are included. Problem 1 focuses on designing a column with specific parameters. Problem 2 involves checking column adequacy via different methods. Problem 3 concerns a tied column in a framed structure, analyzing magnification factors and magnified moments.
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Examination No.1 Reinforced Concrete Design Solve the following problems. 100 points each Problem 1: Design a 355mm wide rectangular short tied column with bars only in two end faces for Pu = 2224 kN, Mu = 339 kN m, f ‘c = 27.8 MPa (4ksi) and fy = 413.7 MPa (60ksi), and e...
Examination No.1 Reinforced Concrete Design Solve the following problems. 100 points each Problem 1: Design a 355mm wide rectangular short tied column with bars only in two end faces for Pu = 2224 kN, Mu = 339 kN m, f ‘c = 27.8 MPa (4ksi) and fy = 413.7 MPa (60ksi), and effective cover of 25mm. Select a column with approximately 2% steel. Use interaction diagram. (See Figure 1) Problem 2: Check the adequacy of the column shown in Figure 2 by means of (a) load contour method and by; (b) reciprocal method. The column is subjected to biaxial bending with Pn = 1000 kN, ex = 200 mm and ey = 200 mm. (f ‘c = 27.6 MPa, fy = 413.7 MPa, Es = 200,000 MPa, and Ao = 615.75 mm2). Effective cover is 75 mm on all sides. Use interaction diagram. Figure 1 Figure 2 Problem 3: A tied column of size b = 305mm and d= 405mm is to be used in a braced frame. It is bent about its “y” axis with the factored moments M1b = 110 kN m and M2b = 125 kN m in double curvature. If the unsupported length is 5 m, k = 0.92, fy = 414 MPa, f’c = 28 MPa , PD = 500 kN, PU = 2200 kN determine the magnification factor and the magnified moment. Pu = 2200 kN M1b 305 mm M2b 65 mm 275 mm 65 mm Pu = 2200 kN 405 mm Figure 3
