Notes From Class
Notes From Class
Week 1: August 28 and 30, September 1, 2023.
In-person Instruction: August 28 and 30 and September 1.
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: September 6 and 8, 2023.
In-person Instruction: September 6 and 8.
Week 3: September 11, 13 and 15, 2023.
In-person Instruction: September 11 and 13.
In-person Review/Homework Assistance: September 15.
Week 4: September 18, 20, and 22, 2023.
In-person Instruction: September 18 and 20.
In-person Review/Homework Assistance: September 22.
Handout: Types of Trusses
Example: Method of Joints .
Example: Method of Sections .
Handout: Analysis of Statically Determinate Structures
Handout: Truss Analysis Tutorial
Week 5: September 25, 27 and 29, 2023
In-person Instruction: September 25 and 27.
In-person Review/Homework Assistance: September 29.
Week 6: October 2, 4 and 6, 2023.
In-person Instruction: October 2 and 4.
In-person Review/Homework Assistance: October 6.
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 7: October 9, 11, and 13, 2023.
In-person Instruction: October 9.
Self-Instruction: Review solutions to midterm 1, October 13.
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 October 11 for Midterm I, but I realize there
might be conflicts with religious commitments.
So please let me know and we adjust accordingly.
Week 8: October 16, 18, and 20, 2023.
In-person Instruction: October 16 and 18.
In-person Review/Homework Assistance: October 20.
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: October 23, 25 and 27, 2023.
In-person Instruction: October 23 and 25.
In-person Review/Homework Assistance: October 27.
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 10: October 30, November 1 and 3, 2023.
In-person Instruction: October 30 and November 1.
In-person Review/Homework Assistance: November 3.
Week 11: November 6, 8 and 10, 2023.
In-person Instruction: November 6 and 8.
In-person Review/Homework Assistance: November 10.
Week 12: November 13, 15 and 17, 2023.
In-person Instruction: November 13 and 15.
In-person Review of Midterm Exams/Homework Assistance: November 17.
Week 13: November 20 2023.
In-person Instruction: Only takehome exam this week ...
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: (1) computation of displacements via integration of
beam differential equations and/or moment area.
Virtual work will not be covered.
Instructions for Submitting Midterm II: See details on ENCE353 home page.
Week 14: November 27 and 29, December 1, 2023.
In-person Instruction: November 27 and 29.
In-person Review/Homework Assistance: December 1.
Week 15: December 4, 6 and 8, 2023.
In-person Instruction: December 4 and 6.
In-person Review/Homework Assistance: December 8.
Week 16: December 11, 2023.
In-person Instruction: December 11
Final Exams: Spring 2020 (pdf), Spring 2021 (pdf), Spring 2022 (pdf), Fall 2022 (pdf).
NOTE: The solutions to Homework 5 are embedded inside the solutions to the recent final exams ...
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: November 5, 2023,
Copyright © 2023, Department of Civil and Environmental Engineering, University of Maryland.
