100kN B (EA is constant) A 60KN + Determine the Force in member 4m D BD) se Force method (Consistent deformation) 3 m

For the plane truss shown below loaded with a 200 kN force, determine the amount of deformation in membes (AB) & (AD) if their cross- sectional areas are known to be AB= 2500 mm² & AAD = 2000 mm² (assume E 200 GPa) 4 m B D 200 KN 2.5 m

Question 5 Match the answers in the columns. v Maximum Shear stress of a cross section. A. using an l-section instead of a rectangular section. v Maximum Bending stress of a cross section. B. Tension and bending force. C. 1m form the supports - v If a simply supported beam is subjected to a distributed load, where are you most likely to find tension bending cracks. D. At Midspan - v Ifa simply supported beam is subjected to a distributed load, where are you most likely to find shear cracks. E. Midspan at the bottom v The bending stress in a section can be reduced by using a F. Midspan at the top v Shear stress can be increased by the width of a section. G. At the supports. v The shear force in fasteners. H. Reducing the width of a section. v Moment couple on a section. 1. using a rectangular section instead of an l-section J. Shear flow K. Increasing the width of a section. L. Only at the section sides touching the NA M. In between the NA and the top/bottom fibres N. Usually at the NA…

The rods AB and CD are made of steel having a failure tensile stress of ?FAIL = 500MPa. Using a factor of safety F.S. = 2.0 for tension, determine their smallest diameter so that they can support the load shown. The beam is assumed to be pin connected at A and C. B A 1.5 kn/m 10m Figure 3.1 Suspended Floor Beam D C