{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

PA1_09_equilibrium_stress_strain

# PA1_09_equilibrium_stress_strain - maximum due to this load...

This preview shows pages 1–2. Sign up to view the full content.

ENGRI/CEE 1160: Modern Structures Fall 2009 PROFESSIONAL ASSIGNMENT 1 NOTES: 1. Date Due: Midnight, Thursday, Sept.17 th 2. Please submit to the Digital Dropbox on the course Blackboard site. 3. State ALL assumptions. In the real world, problems are hardly ever closed- ended: they are usually ambiguous, and need you to complete their definition. Equilibrium Analysis, Stress, and Strain Problem 1 . Figure 1 shows a view of the pedestrian bridge over Cascadilla Gorge. Figure 2 is a sketch of one of the bridge’s main steel girders. Visit the bridge, and (carefully) observe the supports at points A and B. Then assume that one of the design conditions for this bridge is two 10,000 lb emergency vehicles parked at any location along the bridge. a. Find the reactions at points A and B when the vertical reaction at point A is at its

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: maximum due to this load condition. b. Find the magnitude and location of the maximum bending moment in the girder under this condition. c. Does the variation is depth of this girder make technical sense? Why do you think it has this shape? Figure 1. View of new (2006) pedestrian bridge over Cascadilla Gorge. 1 Figure 2. Sketch of one of the steel girders supporting the bridge. Problem 2. How’s your trig? For the ideal truss structure shown in Figure 3: a. Find the reactions; b. Find the forces in the members of the truss; c. If the truss is composed of steel members, each of which has a cross-sectional area of 1 in 2 , make a table showing the stress and strain in each member. Figure 3. A simple truss structure. 2 20 ft 20 ft 20 k 25 degrees 120’-0” 25’-0” A B...
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

PA1_09_equilibrium_stress_strain - maximum due to this load...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online