Notes From Class
Week 1: August 29 and 31, September 2, 2022.
In-person Instruction: August 29 and 31 and September 2.
-
Topic (2022-08-29): Welcome to ENCE 353.
-
Topic (2022-08-31): Overview of Structural Analysis and Design (Part 1):
(pdf)
(zoom video)
-
Topic (2022-09-02): Overview of Structural Analysis and Design (Part II):
(pdf)
(zoom video)
-
Download: Overview of Structural Analysis and Design, Parts 1-2
(pdf) (Version 2022-08-22).
-
Millennium Tower (San Francisco):
See Wikipedia writeup on Millennium Tower,
a 58 story building that is sinking in San Francisco.
-
Sinking Cities:
Sinking of coastal cities is an emerging problem that will cause damage to buildings and urban infrastructure,
increase the risk of flooding, and disrupt water supply systems.
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.
-
YouTube: Simple demonstration of
liquefaction . It's cool.
Week 2: September 7 and 9, 2022.
In-person Instruction: September 7 and 9.
-
Topic (2022-09-07): Introduction to Structural Analysis (Part 1):
(pdf)
(zoom video)
-
Topic (2022-09-07): Introduction to Structural Analysis (Part 2):
(pdf)
(zoom video)
-
Topic (2022-09-09): Introduction to Structural Analysis (Part 3):
(pdf)
(zoom video)
-
Download:
Introduction to Structural Analysis, Parts 1-2-3
(pdf)
(Version: 2022-02-02)
-
Homework 1:
Homework 1
Please see the class web page for instructions on submission of homework.
Due: September 16.
Week 3: September 12, 14 and 16, 2022.
In-person Instruction: September 12 and 14.
-
Topic (2022-09-12): Statically Determinate Structures (Part 1) (Trusses and Planar Structures):
(pdf)
(zoom video)
-
Topic (2022-09-14): Statically Determinate Structures (Part 2) (Beams and Frames):
(pdf)
(zoom video)
-
Topic (2022-09-16): Statically Determinate Structures (Part 3) (Stability):
(pdf)
(zoom video)
-
Download:
Statically Determinate Structures,
Parts 1-2-3 (pdf) (Version: 2021-09-17)
Week 4: September 19, 21, and 23, 2022.
In-person Instruction: September 19 and 21.
Week 5: September 26, 28 and 30.
In-person Instruction: September 26 and 28.
-
Topic (2022-09-26): Analysis of Beam Structures (Part 1) (Connection to Mechanics):
(pdf)
(zoom video)
-
Topic (2022-09-28):
Analysis of Beam Structures (Part 2) (Shear and Bending Moment)
(pdf)
( zoom video )
-
Topic (2022-09-30):
Analysis of Beam Structures (Part 3) (Examples)
(pdf)
( zoom video )
-
Download:
Analysis of Beam Structures, Parts 1-2-3
(pdf) (Version: 2022-02-20)
Week 6: October 3, 5 and 7, 2022.
In-person Instruction: October 3 and 7 (Wednesday is Yom Kippur).
There will be no class on Wednesday, but I will log onto Zoom for office hours 9-10 am.
-
Topic (2022-10-03): Qualitative Sketching of Displacements
(pdf)
(zoom video).
-
Topic (2022-10-05): Principle of Superposition
(pdf)
(zoom video).
-
Topic (2022-10-07): Superposition (Examples)
(pdf)
(zoom video).
-
From the News:
In the wake of Hurricane Ian, structural engineering researchers
want to understand how the destruction of property is related to
Florida's building codes which, of course, have changed over the years.
Aerial view of damage, Fort Myers, Florida.
They are working toward a preliminary assessment by
gathering and merging data from a variety of online resources:
drone footage of the damage,
Google Earth, Google Streetview, and real estate property records.
-
Midterm 1 exams from 2018-2020 that were in-person (50 mins):
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 10, 12, and 14, 2022.
In-person Instruction: October 10. Zoom on Friday.
-
Topic (2022-10-10): Review of Midterm I, Fall Semester 2018.
-
Whiteboard Pics (from 2018-10-15):
Pic01 ,
Pic02 and
Pic03 .
-
Topic (2022-10-10): Review of Midterm I, Fall Semester 2019.
-
Whiteboard Pics (from 2020-03-02):
Pic01 ,
Pic02 ,
Pic03 and
Pic04 .
-
Topic (2022-10-10): Review of Midterm I, Spring Semester 2020.
-
Whiteboard Pics (from 2020-03-09):
Pic01 and
Pic02 .
-
Topic (2022-10-10):
Solutions to Midterm I Exam, Fall Semester, 2020
(pdf).
-
Topic (2022-10-10):
Solutions to Midterm I Exam, Spring Semester, 2021 (pdf).
-
Topic (2022-10-10):
Solutions to Midterm I Exam, Fall Semester, 2021 (pdf).
-
Topic (2022-10-10):
Solutions to Midterm I exam, Spring Semester 2022 (pdf).
-
Solutions to
Homework 2 .
-
MIDTERM 1: October 12, 9 am.
Here is the midterm exam .
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 12 for Midterm I, but I realize there
might be conflicts with religious commitments.
So please let me know and we adjust accordingly.
-
Topic (2022-10-14):
Solutions to Midterm I exam (pdf).
Week 8: October 17, 19, and 21, 2022.
In-person Instruction: October 17 and 19.
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.
-
Topic (2022-10-17): Analysis of Arch Structures (Introduction)
(pdf)
(zoom video).
-
Topic (2022-10-19): Analysis of Arch Structures (Circular and Parabolic Arches)
(pdf)
(zoom video).
-
Topic (2022-10-21): Solution to Arch Problems from Recent (2017 and 2020) Exams
(pdf)
(zoom/panopto video).
-
Case Study:
YouTube video
of collapse of an Arch Bridge in Taiwan.
-
Case Study:
Engineering drawing of St. Louis Gateway Arch (late 1940s).
Rough timeline:
-
Initial planning for the "Gateway to the West" Arch occurred in the mid-1930s.
-
A design competition was held in the late 1940s and early 1950s.
-
Construction began in 1963 and was completed in 1965.
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.
-
Case Study:
Frederick Douglass Memorial Bridge, Washington, DC (2017-2022):
Timeline:
-
Project start: Summer 2017;
-
Project completion: Spring 2022.
Looking beyond the Washington DC region, arch bridges are definitely in vogue, e.g.,
-
Homework 3:
Homework 3
Please see the class web page for instructions on submission of homework.
Due: November 4.
Week 9: October 24, 26 and 28, 2022.
In-person Instruction: October 24 and 26 ...
-
Topic (2022-10-24): Analysis of Cable Structures (Ignore Self-Weight of Cable)
(pdf)
(zoom video).
-
Topic (2022-10-26):
Analysis of Cable Structures (Include Self-Weight of Cable)
(pdf)
(zoom video).
-
Topic (2022-10-28): Solution to Cable Problem, Final Exam, 2018
(pdf)
(zoom video).
-
Case Study:
Architectural drawing of terminal building and cable roof structure at Dulles International Airport (1959).
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 31, November 2 and 4, 2022.
In-person Instruction: October 31 and November 2.
-
Topic (2022-10-31): Elastic Curve for Beam Deflection
(pdf)
(zoom video).
-
Topic (2022-11-02): Integration of Beam Differential Equations (pdf)
(zoom video).
-
Topic (2022-11-04): Moment Area Method (Introduction)
(pdf)
(zoom video).
-
Solutions to
Homework 3 .
Week 11: November 7, 9 and 11, 2022.
In-person Instruction: November 7 and 9 ...
-
Topic (2022-11-07): Moment Area Method (Examples)
(pdf)
(zoom video).
-
Topic (2022-11-09): Solutions to Midterm II Exam, Fall Semester 2019
(pdf)
(zoom video).
-
Topic (2022-11-11): Solutions to Midterm II Exam, Spring Semester 2020
(pdf)
(zoom video).
-
Topic (2022-11-11): Solutions to Midterm II Exam, Fall Semester 2021
(pdf)
-
Homework 4:
Homework 4
Please see the class web page for instructions on submission of homework.
Due: November 18.
Week 12: November 14, 16 and 18, 2022.
In-person Instruction: November 14 and 16.
-
Topic (2022-11-14): Solutions to Midterm II Exam, Spring Semester 2022
(pdf).
-
Topic (2022-11-16): Energy Methods in Structural Analysis
(pdf)
(zoom video).
-
Topic (2022-11-18): Method of Virtual Displacements
(pdf)
(zoom video).
-
Solutions to
Homework 4.
Week 13: November 21 2022.
In-person Instruction: ...
-
MIDTERM 2: November 21, 9 am.
Here is the midterm exam .
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, and (2) arches and cables.
Virtual work will not be covered.
Instructions for Submitting Midterm II: See details on ENCE353 home page.
-
No class on November 23.
If possible, spend the day travelling to your family.
Happy Thanksgiving!
Week 14: November 28 and 30, December 2, 2022.
In-person Instruction: ...
-
Topic (2022-11-28): Method of Virtual Forces (Beam Examples)
(pdf)
(zoom video).
-
Topic (2022-11-30): Method of Virtual Forces (Truss Examples)
(pdf)
(zoom video).
-
Topic (2022-12-02):
Solutions to Midterm 2 exam (pdf).
-
Homework 5:
Homework 5
Please see the class web page for instructions on submission of homework.
Due: December 9 (no extensions).
Week 15: December 5, 7 and 9, 2022.
In-person Instruction: ...
-
Topic (2022-12-05): Force and Displacement Methods
(pdf)
(zoom video).
-
Topic (2022-12-07): Flexibility Method and Matrices
(pdf)
(zoom video).
-
Topic (2021-12-09): ...
Week 16: December 12, 2022.
In-person Instruction: December 12
-
Topic (2022-12-12): Review of Recent Final Exams and Solutions
Final Exams:
Fall 2017 (pdf),
Fall 2018 (pdf),
Spring 2020 (pdf),
Spring 2021 (pdf),
Spring 2022 (pdf).
NOTE: The solutions to Homework 5 are embedded inside the solutions
to the recent final exams ...
-
Office hours this week: I will hold Zoom office hours W and F, 9-10.
Of course, if you have a study question you can also send me an e-mail.
-
Please fill out the Maryland Course Evaluation -- believe it or not, over time
we do try to improve the content and way in which courses are taught.
Final Exam
-
December 17, 8 am.
Here is the final exam. Good luck!
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: December 10, 2022,
Copyright © 2022, Department of Civil and Environmental Engineering, University of Maryland.
