Department of Civil and Environmental Engineering, Spring Semester, 2025
ENCE 353 Midterm 1, Open Notes and Open Book
Name: Ruskin
E-mail (print neatly!): Cikstin & umd . el
Exam Format and Grading. This take home midterm exam is open notes and open book. You need to
comply with the university regulations for academic integrity.
There are two questions. Partial credit will be given for partially correct answers, so please show all your
working.
Please see the class web page for instructions on how to submit your exam paper.
Question Points Score
1 20
2 20
Total 40
, Question 1 (20 points): Support Reactions and Bending Moments in a Combined Beam/Truss Struc-
ture
Consider the combined multi-span beam/truss structure shown in Figure 1.
J7P kN
3P kN —
0K
3L
2L L‘IAL‘L|L
ot <
1<t > |
>~
Figure 1. Front elevation view of multi-span beam structure.
The cantilever is fully-fixed to the wall at Point A. Points B, D, E and H are hinges. Horizontal and vertical
point loads 3P (kN), 2P (kN) and P (kN) are applied to the beam and truss as shown in Figure 1.
[1a] (2 pts). Compute the degree of indeterminacy for the articulated beam structure (A-B-C-D-E-F-G-H).
o= $~3_r. - §-3- 2 =0 <— shahkeelly
= 3 delerminate |
Where © = DO B:c\scs
_F = 4ztal exleracl %‘T‘L& = &
Po Qfi‘uah\u.\: ?{'\\M Stehes = 3
3
N
[1b] (3 pts). Identify the zero-force members in the truss structure. You can simply mark them up on
Figure 1.
(\
—r
bc,gc(utc
o
Cj, wWa 2,
O
—y
Sez, F:.g I, o=
) ?(\\N\ cr\(-_\b(s:s\
E
4
2
ENCE 353 Midterm 1, Open Notes and Open Book
Name: Ruskin
E-mail (print neatly!): Cikstin & umd . el
Exam Format and Grading. This take home midterm exam is open notes and open book. You need to
comply with the university regulations for academic integrity.
There are two questions. Partial credit will be given for partially correct answers, so please show all your
working.
Please see the class web page for instructions on how to submit your exam paper.
Question Points Score
1 20
2 20
Total 40
, Question 1 (20 points): Support Reactions and Bending Moments in a Combined Beam/Truss Struc-
ture
Consider the combined multi-span beam/truss structure shown in Figure 1.
J7P kN
3P kN —
0K
3L
2L L‘IAL‘L|L
ot <
1<t > |
>~
Figure 1. Front elevation view of multi-span beam structure.
The cantilever is fully-fixed to the wall at Point A. Points B, D, E and H are hinges. Horizontal and vertical
point loads 3P (kN), 2P (kN) and P (kN) are applied to the beam and truss as shown in Figure 1.
[1a] (2 pts). Compute the degree of indeterminacy for the articulated beam structure (A-B-C-D-E-F-G-H).
o= $~3_r. - §-3- 2 =0 <— shahkeelly
= 3 delerminate |
Where © = DO B:c\scs
_F = 4ztal exleracl %‘T‘L& = &
Po Qfi‘uah\u.\: ?{'\\M Stehes = 3
3
N
[1b] (3 pts). Identify the zero-force members in the truss structure. You can simply mark them up on
Figure 1.
(\
—r
bc,gc(utc
o
Cj, wWa 2,
O
—y
Sez, F:.g I, o=
) ?(\\N\ cr\(-_\b(s:s\
E
4
2
