Draw the influence line for the moment at B. What is the line’s minimum value? Let L1 = 8 m and L2 = 3 m.

Draw the influence line for the moment at B. What is the line’s minimum value? Let L1 = 4 m and L2 = 11 m.

The beam supports a single live load of 1,500 lb, a uniform live load of 550 lb/ft, a uniform dead load of 100 lb/ft. Determine the maximum positive moment that can be developed at point B. Assume the support at A is a pin and C is a roller. The influence lines for VB and MB are shown, along with the peak values of the influence lines.

Determine the vertical displacement of joint A if members AE and DE experience a temperature increase of 36°C. Let L = 8 m and α = 11.8E-6/°C.

Determine the slope at A that would be caused by the distributed load if the fixed support was a pin support, instead. Let w = 4 lb/in., a = 108 in., and EI = 214 × 106 lb·in.2.

The beam supports a uniform live load of 503 lb/ft. Determine the maximum positive shear that can be developed at point B. Assume the support at A is a pin and C is a roller. The influence lines for VB and MB are shown, along with the peak values of the influence lines.

Determine the deflection at B that would be caused by the distributed load if the middle support was not there. Let w = 8 lb/in., a = 58 in., and EI = 115 × 106 lb·in.2.

Determine the deflection at B that would be caused by the concentrated moment if the middle support was not there. Let M = 19,300 lb·in., a = 58.89 in., b = 43.11 in., and EI = 37 × 106 lb·in.2. Note that b = (a + b).

Assuming that the live loads are transmitted to the bottom chords of the truss, draw the influence line for the force in member CD. What is the line’s minimum value? Let L = 14 ft.

The beam supports a uniform live load of 544 lb/ft. Determine the maximum negative shear that can be developed at point B. Assume the support at A is a pin and C is a roller. The influence lines for VB and MB are shown, along with the peak values of the influence lines.