Tham khảo tài liệu 'fundamentals of structural analysis episode 1 part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Beam and Frame Analysis Force Method Part I by S. T. Mau For the thrust diagram we designate tension force as positive and compression force as nagative. For shear and moment diagrams we use the same sign convention for both beams and columns. For the vertically orientated columns it is customary to equate the in-side of a column to the down-side of a beam and draw the positive and nagetive shear and moment diagrams accordingly. 3 m 3 m 4 111 I 4 m Thrust shear and moment diagrams of the example problem. Example 10. Analyze the loaded frame shown and draw the thrust shear and moment diagrams. 115 Beam and Frame Analysis Force Method Part I by S. T. Mau 15 kN m Statically determinate frame example problem. Solution. The inclined member requires a special treatment in finding its shear diagram. 1 Find reactions and draw FBD of the whole structure. fv c 0 c 60 2 - R 8 0 R 15 kN 2 Draw the thrust shear and moment diagrams. Before drawing the thrust shear and moment diagrams we need to find the nodal forces that are in the direction of the axial force and shear force. This means we need to decompose all forces not perpendicular to or parallel to the member axes to those that are. The upper part of the figure below reflects that step. Once the nodal forces are properly oriented the drawing of the thrust shear and moment diagrams is achieved effortlessly. 116 Beam and Frame Analysis Force Method Part I by S. T. Mau 60 kN 36 kN 48 kN 15 kN 9 kN 48 kN 5m kN m 36 kN 5m kN m 12 kN M Thrust shear and moment diagrams of the example problem. .
