Help In All Multiple Choices Pleas Please 1 (112.54 KiB) Viewed 15 times
Help In All Multiple Choices Pleas Please 2 (116.09 KiB) Viewed 15 times
X) vi) ix) a) b) c) d) a) b) a) b) c) c) d) d) b) c) d) vii) The bending moment at the middle of interior spans is equal to... a) 10.74 kNm per metre b) c) d) The bending moment near the middle of end span is equal to... a) 17.39 kNm per metre b) c) d) (1.5 Marks) viii) The area of main reinforcement is required at the middle of end spans and the first interior support is equal to... (Use d = 135 mm) 39 mm²/m 139 mm²/m area of bay exceed 30 mm² Qk is less than 1.25Gk Qk is less than 5.0 kN/m² All spans are equal 18.39 kNm per metre 19.39 kNm per metre 20.39 kNm per metre 11.74 kNm per metre 12.74 kNm per metre 13.74 kNm per metre (1.5 Marks) 239 mm²/m 339 mm²/m (1.5 Marks) The area of main reinforcement is required at the middle of interior span and interior support is equal to... (1.5 Marks) 228 mm2/m 238 mm2/m 248 mm2/m 258 mm2/m 1.58 1.68 1.7 (1.5 Marks) Using bending moment in question (vi) above and d = 135 mm, the modification factor for tension reinforcement is equal to... a) 0.16 (1.5 Marks)
ii) The main reinforcement in reinforced concrete pad foundation is placed parallel to the shorter side parallel to the longer side both ways at bottom section both ways at top section iii) a) b) C) a) b) c) d) c) 1.5d d) 2.0d d) (1.5 Marks) iv) A higher concrete grade is required for pad foundation because it is exposed to environment. The minimum percentage of mild steel reinforcement in reinforced concrete pad foundation is 0.13% 0.18% 0.24% 0.26% a) mild moderate severe extreme (1.5 Marks) v) The reinforcement is uniformly distributed over the pad foundation width when the distance of 2x spacing between columns a Less than 3c 9d + 4 4 b. Exceeds + c. : Exceeds d. Less than 2+ 3 9d +2 2d 3 vi) The anchorage length of starter bar is equal to a) 250 b) 270 c) 290 d) 310 (1.5 Marks) vii) The critical section for punching shear is at a) 0.5d b) 1.0d 2 (1.5 Marks) (1.5 Marks) from the column face. (1.5 Marks)
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