٤/١ Q2-A water-tight shield is prevented from overturning by means of wooden struts AB (see figure) each having a circular cross-section 15 cm in diameter. The allowable stress for the material of the struts is 20 kg/cm2. Determine the maximum allowable distance between the struts. Answer: 1-88 m. 4m 3m

Problem 5: Replace the loading by an equivalent resultant force and couple moment at point O. 0.5 m 0.7 m F,=(-2 i+5j-3 k) kN 0.8 m F = (8 i– 2 k} kN

For the given one bay- one story frame; wn=0.5 s, E=30000 MPa, I=3*107 mm4, S= I/c=2.5*105 mm3. Determine u0, the maximum dynamic deformation and maximum bending stress in the column. Neglect damping.