Answer Happy

Question 3 The concrete frame of the Figure Q3 is under uniform characteristic dead gx = 35kN/m and imposed line load qx = 20kN/m at each one of the floors including the roof and is supported on a soil with safe bearing resistance Ost=200kPa. Assume that the foundation is under vertical concentrated load without the presence of bending. Other useful information is given in Table Q3. 3m 3m 3m А 3m B с 5m 5m 5m Figure Q3: Geometry of the plane concrete frame Font Paragraph Styles LGING Table Q3: Design data Concrete of grade C30/37 Reinforcement cover c 45 mm Reinforcing steel fuk 500 N/mm2 Young's modulus E 210 000 N/mm² Size of all columns at ground floor level 350 mm x 350 mm Foundation size (width x length x height) 2500 x 2500 x 600 mm For this frame perform the following tasks: 1. Estimate the design reaction force acting at support B. [3 marks] 2. Design the pad foundation at support B against bending. [8 marks] 3. Design the same pad foundation against shear. [15 marks] 4. Provide neat sketches indicating the reinforcement detailing of the foundation (one section and one plan view). [4 marks] Page 4 of 4