Answer:
For question 2(a), you need to draw the influence line diagram for reactions and bending moment for the simply supported beam shown in Figure Q2(a). Unfortunately , the figure is not provided in the search results.
For question 2(b), you need to draw the influence line diagram for reactions and bending moment at 3 m from the left span for a single rolling load of 90 kN moving on a girder of 12 m span . You can follow these general steps to draw an influence line diagram:
Consider a unit load (usually 1 kN or 1 tonne) placed at different positions along the span of the beam.
Calculate the reactions and bending moment at the given point due to the unit load placed at different positions.
Plot the values of reactions and bending moment on the y-axis against the position of the unit load on the x-axis.
Connect the points to obtain the influence line diagram.
To draw the influence line diagram for reactions and bending moment at 3 m from the left span , you can follow these specific steps:
Place the unit load at 3 m from the left span and calculate the reactions and bending moment at the given point.
Repeat the previous step for different positions of the unit load along the span of the beam.
Plot the calculated values of reactions and bending moment on the y-axis against the position of the unit load on the x-axis.
Connect the points to obtain the influence line diagram for reactions and bending moment at 3 m from the left span.
Note: It is important to consider the type of load (UDL, point load, rolling load, etc.) and its direction while drawing the influence line diagram.
Step-by-step explanation: