Internal forces in a truss

In summary, the queen's posted truss consists of the beam ABCD, compression members BE CF, and the cable AEFD. A stress analysis under the uniform load q is required, and the analysis procedure would involve identifying the external forces, calculating internal forces using Castigliano's second theorem, and verifying equilibrium. The effects that can be ignored include axial and shearing forces in the beam and any shearing or moment forces in the cable.
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the queen posted truss in the picture consists of the beam ABCD, compression members BE CF amd the cable AEFD, a stress analysis under the uniform load q is required. outline an analysis procedure, state the effects you would ignore and why.
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i am not sure what i am meant to be doing here, this is part of an assignment dealing with castiglianos 2nd theorem,. what is the analysis procedure? do they mean how would i go about finding the inner forces?
as far as effects to ignore, i would ignore the axial and shearing force in the beam ABCD, is this correct as i assume theirs to be negligible compared to the moment's energy.
can a cable have an internal shearing force and moment or also only axial forces( tension)
 
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  • #2
? Analysis procedure: 1. Identify the external forces (and moments) to be applied to the truss, such as a uniform load q. 2. Calculate the internal axial, shear, and moment forces in each member of the truss using Castigliano's second theorem. 3. Calculate the reactions at the supports. 4. Verify the equilibrium of the system. Effects to Ignore: The axial and shearing forces in the beam ABCD can be ignored since it is assumed that the bending moments are much larger than the axial and shear forces in this member. The cable AEFD will only experience tension, so any shearing or moment forces should be neglected.
 

What are internal forces in a truss?

Internal forces in a truss refer to the forces that act on the individual members of the truss structure. These forces are a result of the external loads applied to the truss and the reactions from the supports.

What are the types of internal forces in a truss?

The two main types of internal forces in a truss are tension and compression. Tension forces pull on the members of the truss, while compression forces push on them. These forces are balanced and work together to keep the truss stable.

How are internal forces calculated in a truss?

Internal forces in a truss can be calculated using the method of joints or the method of sections. The method of joints involves analyzing the forces at each joint in the truss, while the method of sections involves looking at a section of the truss and analyzing the forces acting on it.

What factors affect the internal forces in a truss?

The internal forces in a truss are affected by the external loads applied to the truss, the geometry and material properties of the truss, and the supports and connections used. Any changes in these factors can alter the internal forces in the truss.

What is the significance of understanding internal forces in a truss?

Understanding internal forces in a truss is important for ensuring the structural integrity and stability of the truss. By knowing the internal forces, engineers and designers can make informed decisions about the design and materials used in a truss to ensure it can withstand the applied loads and remain stable.

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