Question 6.5: Wood beams cantilevered out from a house to form an elevated...

Structural Analysis: Skills for Practice

Wood beams cantilevered out from a house to form an elevated deck. The owners wanted a bigger deck, so they extended the beams and added columns at the far ends. The addition was not engineered, so the owners have no idea whether the deck is safe. Now that they want to sell the house, they have hired our firm to evaluate the capacity of the deck in its current condition.

Our team is to determine the required capacity of the moment reaction at A. To help in that process, our assignment is to develop the influence line for $M_A$ . This is a great opportunity for us to practice the Muller-Breslau Method.

E6.22

The "Step-by-Step Explanation" refers to a detailed and sequential breakdown of the solution or reasoning behind the answer. This comprehensive explanation walks through each step of the answer, offering you clarity and understanding.
Our explanations are based on the best information we have, but they may not always be right or fit every situation.

The blue check mark means that this solution has been answered and checked by an expert. This guarantees that the final answer is accurate.
Learn more on how we answer questions.

This Question has been Answered.

Already have an account?

Related Answered Questions

Question: 6.9

The largest live load effect on a pedestrian bridge is likely due to distributed load over part of the bridge. In Example 6.4, we developed the influence line for the axial force in member BH. The maximum likely live load for this bridge results in a distributed load of 500 plf that can act ...

Verified Answer:

Detailed Analysis: Location where the influence li...

Question: 6.10

Repairs need to be made to the left side of the bridge. Therefore, the contractors want to store materials and equipment on the right half. The resulting distributed load on the girder will be rather large. Before authorizing the contractor to use the bridge for storage, we should check the ...

Verified Answer:

Detailed Analysis: Magnitude of the influence line...

Question: 6.9

Repairs need to be made to the left side of the bridge. Therefore, the contractors want to store materials and equipment on the right half. The resulting distributed load on the girder will be rather large. Before authorizing the contractor to use the bridge for storage, we should check the ...

Verified Answer:

Detailed Analysis: Magnitude of the influence line...

Question: 6.8

People walking together in a group tend to walk side-by-side. Therefore, they cause a point live load on a pedestrian bridge. For this bridge, the point live load on one truss is 6001b. In Example 6.4, we developed the influence line for the axial force in member BH. In order to calculate the peak ...

Verified Answer:

Detailed Analysis: Peak tension: Location of peak ...

Question: 6.7

We have also been tasked with developing the influence line for the internal moment at the damaged location, D. ...

Verified Answer:

Construct Influence Line: Release the moment carry...

Question: 6.6

Our job is to construct an influence line for the internal shear at the damaged location, point D. ...

Verified Answer:

Construct Influence Line: Release the shear carryi...

Question: 6.4

Our team is designing a pedestrian footbridge. Before we can select member sizes, we need to know the peak axial force for each member. An influence line will show where the live load must act to generate the peak force in a certain member and will allow us to calculate the resulting axial force. ...

Verified Answer:

Detailed Analysis: Identify locations for the unit...

Question: 6.3

In order to design the splice for the bridge girder in Example 6.2, we need to know the peak moment generated at that splice as well. Therefore, we need to construct another influence line. ...

Verified Answer:

Detailed Analysis: Identify locations for the unit...

Question: 6.2

Tractor trailers beyond a certain length require special permits. As a result, long bridge girders are often brought to the site in multiple parts and spliced together. In order to design the splice for a particular single-span bridge, we need to know the peak shear generated at that splice. To ...

Verified Answer:

Detailed Analysis: Identify locations for the unit...

Question: 6.1

A continuous beam supports the floor of a house and the carport covering. In order to properly design the support at A, we need to know which loads generate an upward reaction at A and which generate a downward reaction. An influence line for the vertical reaction at A will provide us that ...

Verified Answer:

Detailed Analysis: Identify locations for the unit...