ENCE 717: BRIDGE ENGINEERING

(www.ence.umd.edu/~ccfu/ence717.html)

Spring 2020, Tu 5:00-7:35 pm
EGR 0135
Instructor: Dr. Chung C. Fu, P.E.
Office: 4116 Technology Ventures Building (http://www.best.umd.edu/location/)

5000 College Ave, University of Maryland, College Park, MD 20742
Office Hours: TuTh 1:00-3:00pm
Phone : 301-405-2011
E-mail : ccfu@umd.edu

Course Objectives:

To give students understanding of the AASHTO Specifications and access to advanced knowledge in design of long-span steel plate girder, steel truss and prestressed concrete bridges. It is meant to include an introduction to computer-added design programs to analyze and design such structures.

Course Description:

The design and rating of bridge structures in accordance with the AASHTO LRFD (and WSD, LFD, if applied) specifications. Development of the basic strength and performance requirements as defined within AASHTO codes. Projects requiring the design, rating and ultimate strength evaluations will be assigned for all of the predominate construction types including: steel, concrete and wood (may include FRP); simple and continuous span; straight and horizontally curved; non-composite and composite I- and box section superstructure elements.

Course Workload:

• Readings (textbook, selected journal papers, additional handouts)
• Six to eight homework
• Two projects

Prerequisites:

Not listed, but preferable ENCE454 Design of Concrete Structures and ENCE455 Design of Steel Structures (or equivalent courses).

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Textbooks:

Fu, C.C., and Wang, S.Q., “Computational Analysis and Design of Bridge Structures,” ISBN-13 978-1466579842, book published by CRC Press (http://www.amazon.com/Computational-Analysis-Design-Bridge-Structures/dp/1466579846)

Reference books:

1. AASHTO Standard Specifications for Highway Bridges (http://www.aashto.org)
2. AASHTO LRFD Bridge Design Specifications (http://www.aashto.org)
3. AISI Four LRFD Design Examples of Steel Highway Bridges (http://www.aisc.org)
4. PCI Precast Prestressed Concrete Bridge Design Manual (http://www.pci.org)
5. Forest Service Timber Bridges (http://www.fpl.fs.fed.us/documnts/misc/em7700_8--entire-publication.pdf )
6. Bridge Rehabilitation and Replacement by Sung H. Park (http://www.amazon.com/Bridge-Rehabilitation-Replacement-Repair-Practice/dp/0960444017/ref=sr_1_2?s=books&ie=UTF8&qid=1451937956&sr=1-2&refinements=p_27%3ASung+H.+Park )
7. Bridge Inspection by Sung H. Park (http://www.amazon.com/Bridge-Inspection-Structural-Analysis-Hand/dp/0960444009/ref=sr_1_8?s=books&ie=UTF8&qid=1451937956&sr=1-8&refinements=p_27%3ASung+H.+Park )
8. Bridge Inspector's Reference Manual (BIRM)
9. Design of Highway Bridges: An LRFD Approach, 3rd Edition (https://www.wiley.com/en-us/Design+of+Highway+Bridges%3A+An+LRFD+Approach%2C+3rd+Edition-p-9780470900666)
10. Theory and Design of Bridges by P.P. Xanthakos (https://www.amazon.com/Theory-Design-Bridges-Petros-Xanthakos/dp/0471570974)
11. Bridge Substructure and Foundation Design by P.P. Xanthakos (https://www.amazon.com/Bridge-Substructure-Foundation-Design-Xanthakos/dp/0133006174 )
12. Design of Modern Highway Bridges by Narendra Taly (https://www.amazon.com/Design-Modern-Highway-Bridges-Narendra/dp/0070629978)

Related Web Pages:

1. FHWA Bridge Division (http://www.fhwa.dot.gov/bridge/index.htm)
2. IABSE - International Association for Bridge and Structural Engineering (http://www.iabse.org/)
3. IABMAS – International Association for Bridge Maintenance and Safety (http://www.iabmas.org/)
4. International Bridge Industry (http://www.bridgeweb.com/)
5. Bridge related Links (http://www.bridgesite.com/)

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News:

1. Spring Break March 15-21

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Syllabus for Spring 2020

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ENCE 717 : BRIDGE ENGINEERING

COURSE CONTENTS

The course will be partitioned into five parts:

• I. Introduction (2 weeks) :
• Bridge engineering and bridge engineers/LRFD design limit states/Loads and reliability
• Methods of analysis
• HW#1 & the spreadsheet form (individual; due 02/11/20)
• HW#1A CSiBridge test on fundamental frequency; Compare and submit (1) the graph showing "the first modal frequency and shape" as well as (2) the excel sheet showing "the calculation of Single I-girder composite (N=n) moment of inertia and fundamental frequency of the whole bridge".  (tutorial CSiBridge; individual; due 03/03/20)
• II. Steel Bridges (4 weeks) :
• Steel bridge
• AASHTO Composite and non-composite steel bridges
• Steel bridge design (LRFD Design Example for Steel Girder Superstructure Bridge)
• Steel bridge load rating by LRFD/LFD/WSD
• HW#2: (both of them assume Fy=50 ksi, fc’=4 ksi, modulus ratio = 8, rebars are 0.88 in²/ft at mid-height of the slab)

a) Use FHWA 5-girder steel I-section bridge example (pages 113, 114 & 119 for M+ and M- sections; Fu’s textbook Chapter 6 pages 220 & 221 for calculation demonstration) at the to calculate I-section properties using the provided I-Section excel template

b) use Metro single-box rail bridge case (w/ M+ section top pl.16 x 1.375”, bot pl. 73 x 0.625 & web 88 x0.75” inclined angle 7.6°; w/ M- section top pl.24 x 2.625”, bot pl. 73 x 1.375 & web 88 x0.75” inclined angle 7.6°; top lateral bracing equivalent thickness 0.05” 3” down from the top flange; slab thickness 9.5” where 9” effective is used in the calculation, haunch 5” and overhang 6.5’ both sides) Fu’s textbook Chapter 8 pages 261 & 262 for calculation demonstration) to calculate box-section properties using the provided box-section excel template (individual; due 02/18/20)

• HW#3: With the Full Effective Flange Width, redo FHWA example positive moment area (1) section properties (p. 3-13); (2) stresses for Strength I, Service II & Fatigue (p. 3-29); (3) plastic moment M_p (p. 3-39); and (4) yield moment M_y (p3-41) using the provided excel template (individual; due 02/25/20)
• HW#4A: (A) DASH Practice (tutorial: http://www.best.umd.edu/merlin-dash-new-interface/) by following the FHWA example (revised from sample data LRFDEX2E.dat) and (B) making comparison between the two with the excel template for DASH-Analysis Check (group/individual; due 03/10/20). Check items are:
1. Load combination for moment check @ 0.4L & 1^st interior support locations
2. Load combination for shear check @ abutment & 1^st interior support locations
3. Stress check @ 0.4L & 1^st interior support locations
4. Fatigue stress check at 1^st interior support
5. Shear range check at abutment

o HW#4B: (C) Make a full 3D run by CSiBridge and compare (1) max. positive LL+I moment; (2) max. negative LL+I moment; (3) max. LL+I shear; (4) max. LL+I reaction; (5) fundamental natural frequency. Use the excel template CSiSteel_template. (group/individual; due 03/31/20)

• Fatigue and fracture/ Fatigue calculation
• Truss bridges
• III. Concrete Bridges (4 weeks) :
• Concrete bridges; Curved concrete bridges
• AASHTO Concrete bridge material
• HW#5: With the Full Effective Flange Width, redo FHWA example interior (1) CGS of the basic beam; (2) section properties (p. 2-4 & 2-10); using the provided excel template and also (3) finish the calculation in four parts, N=infinity, 3n & n and strand C.G. of that template. (due 04/07/20) (http://www.gcprestress.com/products.html)
• Reinforced concrete bridge design
• Prestressed concrete bridge design (LRFD Design Example for Prestressed Concrete Girder Superstructure Bridge)
• HW#6: DASH (or other similar PC program) Practice (tutorial: http://best.umd.edu/software/merlin-dash-pbeam/index.html) by following the FHWA example (revised from sample data Pci9-6a.dat) and making comparison between the two with the excel template for DASHP-Analysis Check (due 04/14/20). Check items are:
1. Load combination for moment check @ 0.4L & interior support locations (Table 1)
2. Load combination for shear check @ 1^st & interior supports (Table 2)
3. Stress check @ 0.4L & interior support locations (Table 3 - At Release & Table 4- At Service)
• Arch bridges
• IV. Miscellaneous (2 weeks) :
• Long-span bridges and construction
1. Segmental bridges
2. Arch bridges
3. Cable-stayed bridges
4. Suspension bridges
• Bridge decks, joints and bearings
• Bridge inspection and management
• Non-destructive evaluation techniques
• Bridge related issues – Accelerated Bridge Construction (ABC); (STM, stability, (Special Topic I); redundancy, integral abutment bridge, bridge geometry (Special Topic II) and dynamics/earthquake (Special Topic III)
• V. Foundations/Substructures (2 weeks) :
• Retaining wall and abutment (Abutment/Pier Design) (Abutment/Pier Design Calculation for FHWA Example Concrete Bridge Substructure)
• Pier
• Spread and piled foundation
• HW #7: Using the excel template for Integral Abutment Calculation redesign the whole integral abutment of the FHWA example concrete bridge substructure (pp. 7-6 thru 37) assuming the whole superstructure loads (including the approach slab live load) increased by 50% (hint: try to keep the size of the substructure, only modify the reinforcement.) (due 04/28/20)
• Final: Segmental bridge analysis (Final_CE717_SegmentalBr.pdf) report (due 05/15/20; not less than 6,000 words where each table or figure can be counted as 250 words)
1. Describe the bridge (North Vernon Bridge, Indiana)
2. Describe the segmental bridge and balanced cantilever construction
3. Final LRFD moment and shear diagrams under Strength I limit state
4. Final LRFD stress diagrams under Service II limit state
5. (bonus) Stage construction

*** (Report demo)

Footnote: Homework - 80%, Final - 20%, Total 100%

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Click here to E-mail questions or comments.

by Chung C. Fu
Last Modified Feb. 6 2020
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