Structuers I Extra Credit Problem No. 1
ANSWER KEY

Given: a 30 foot long W14 x 30 steel beam is loaded with an evenly distributed load of 1.0 k/ft.
Determine: the magnitude and locations of the Maximum Shear, Moment and Deflection for the following three conditions:

Solution: the beam geometry and loadings are explicit and are not reproduced here for each one..... only as an example:

And the loading should look like:

The results of the three cases of the problem are as follows:

  • if the beam is a single span of 30 ft.

  • if the beam is continuous over two equal spans of 15 ft.

  • if the beam is continuous over four equal spans of 7.5 ft each.

    (cont.)

    NOTE:
    It should be obvious that the magnitude of the internal forces decreases with a decreasing span. A table was suggested to illustrate the above.

    In order to receive full credit, the question ""What happens to the maximum moment between beam A and B???" should have been answered.

    It is sufficient to go into the "page layout" menue and create a report page that will include only the items that are needed to answer the questions. This will save paper!!!!

    © 1995,1996 Chris H. Luebkeman