Notes From Class
Notes From Class
Week 1: January 25 and 27, 2023.
In-person Instruction: January 25 and 27.
Case Study:
Jakarta is home to 10.9 million people and the capital city of Indonesia.
It is also the fastest sinking city in the world (sinking 10 inches per year in places).
Google: Jakarta sinking
Sinking Cities within US:
New Orleans, 2 inches per year;
Houston, 0.8 inches per year;
Virginia Beach, 12 inches in the past 50 years;
Miami, 12 inches in the past 100 years.
Week 2: January 30. February 1 and 3, 2023.
In-person Instruction: January 30, February 1 and 3.
Week 3: February 6, 8, and 10, 2023.
In-person Instruction: February 6 and 8.
In the aftermath of the devastating (Magnitude 7.8) earthquake in Turkey/Syria,
people from all over the World are asking:
How could so many buildings collapse?
If a large earthquake happened here, would our buildings fall down too?
One of the main purposes of design codes is to provide minimum standards of public safety.
In regions of high seismicity, this means additional provisions for protection against ground motions.
As an example, this figure shows three mechanisms of building protection mandated by law in Japan.
Buildings that were constructed before modern design codes may need to be strengthened.
Week 4: February 13, 15, and 17, 2023.
In-person Instruction: Feb. 13 and 15.
Handout: Types of Trusses
Example: Method of Joints .
Example: Method of Sections .
Handout: Analysis of Statically Determinate Structures
Handout: Truss Analysis Tutorial
Week 5: February 20, 22 and 24, 2023.
In-person Instruction: February 20 and 22.
Midterm I from Fall Semester, 2018.
Midterm I from Fall Semester, 2019.
Midterm I from Spring Semester, 2020.
Midterm 1 exams that were on-line (12 hr format):
Midterm I from Fall Semester, 2020.
Midterm I from Spring Semester, 2021.
Week 6: February 27. March 1 and 3, 2023.
In-person Instruction: February 27.
NOTE: You have 12 hrs to complete and return the exam. Please make sure your name and e-mail are clearly written on the first page.
Open book and open notes. University rules on academic integrity apply.
Three questions covering computation of indeterminacy, support reactions,
shear and bending moment diagrams, tensile and compressive element-level forces.
Instructions for Submitting Midterm I: See details on ENCE353 home page.
NOTE ON EXAM DATE:
I am proposing March 1 for Midterm I, but I realize there
might be conflicts with religious commitments.
So please let me know and we adjust accordingly.
Week 7: March 6, 8 and 10, 2023.
In-person Instruction: March 6 and 8.
Week 8: March 13, 15, and 17, 2023.
In-person Instruction: March 13 and 15.
Change of topic: for the next two weeks we will cover analysis of arch structures followed by analysis of cable structures.
See, in particular, the notes and video on parabolic arches -- definitely the coolest part of this course --
and links (below) to recently developed projects.
Rough timeline:
There is a nice write-up of the history and development of the arch on Wikipedia.
The principal architect, Eero Saarinen, also designed the terminal building at Washington Dulles Airport.
Timeline:
Looking beyond the Washington DC region, arch bridges are definitely in vogue, e.g.,
Week 9: March 20, 22 and 24, 2023.
Week 10: March 27, 29 and 31, 2023.
In-person Instruction: March 27 and 29.
As noted above, architect Eero Saarinen worked on the design of Dulles Airport during the 1950s, some 20-odd
years after completing the St. Louis Arch. You can see the influences of his previous work
in the shape of the cantilever supports.
What's really amazing is that this structure was designed without the aid of modern computational analysis
tools (i.e., no Matlab), relying instead on "first principles of engineering" (equilibrium)
and the construction of small-scale models.
See, in particular, slides 12-15 and 22-24 of this
handout .
Slide 24 shows that foundation level of the structure essentially acts as a huge deep beam,
with tensile forces at the lower-most sections of the ground slab carried by reinforcing/prestressed cables.
Week 11: April 3, 5 and 7, 2023.
In-person Instruction: April 3 and 5.
Week 12: April 10, 12 and 14, 2022.
In-person Instruction: April 10 and 12.
Week 13: April 17, 19 and 21, 2023.
In-person Instruction: April 19.
NOTE: You have 12 hrs to complete and return the exam. Please make sure your name and e-mail are clearly written on the first page.
Open book and open notes. University rules on academic integrity apply.
Three questions covering principle of superposition,
and computation of displacements via integration of
beam differential equations and/or moment area.
Instructions for Submitting Midterm II: See details on ENCE353 home page.
NOTE ON EXAM DATE:
I am proposing April 17 for Midterm II, but I realize there
might be conflicts with religious commitments. So please let me know.
If April 17 will not work, am happy to move to April 19.
Just read Section 6.1 to see the connection between
energy methods (specifically kinetic and potential energy) and
the derivation of equations of motion from applications in physics.
Week 14: April 24, 26 and 28, 2023.
In-person Instruction: April 24 and 26.
Week 15: May 1, 3 and 5, 2023.
In-person Instruction: May 1, 3 and 5.
Week 15: May 08, 2023.
In-person Instruction: May 8, 2023.
Final Exams: Fall 2017 (pdf), Fall 2018 (pdf), Spring 2020 (pdf), Spring 2021 (pdf), Spring 2022 (pdf), Fall 2022 (pdf).
FINAL EXAM
NOTE: You have 24 hrs to complete and return the exam.
Please make sure your name is clearly written on the first page.
Cross out the two questions that you do not want marked.
Open book and open notes. University rules on academic integrity apply.
Six questions: Question 1 is compulsory. Do three of the remaining five questions.
Topics include: Moment area, virtual forces, virtual displacements, force method
and flexibility matrices.
Submitting the Final Exam: See details on ENCE353 home page.
Last Modified: May 17, 2023,
Copyright © 2023, Department of Civil and Environmental Engineering, University of Maryland.
