Documentation

Gantt Chart

The gantt chart estimates the time needed to complete each task or the project.  These estimations are based on complexity, volume of work, and amount of members who know how to perform the task.  Final design and fabrication are projected to take the most time.  Time has been allotted in project management for additional technical advising.  This gantt chart is an estimate and is subject to change.

Internal Team Budgeting

The table below shows a sample estimate of the team's budget. Note that this estimate is based on building the actual bridge and not the scale 1:10 model that will be demonstrated at the PSWC Conference.

Team Meeting Notes

09/24/2012

• Constraints and Inputs
• Rules for competition
• Goals of Bridge
• Weight vs. Speed of Construction vs. Deflection
• History of past NAU’s Steel Bridges
• 2012 Bridge
• Mechanics Lab Bridge
• Sechrist Bridge
• Basic Bridge Design
• Building Big? -> deviate from past few year’s design
• Look at past winning bridges
• Basic Connection Types
• Fabrication Ease
• Sponsorship
• Schuff Steel -> prepare presentation

10/15/2012

• Bridge Designs and Concepts
• Benefits
• Potential problems
• Lateral loading considerations
• Decision Matrix
• How did we arrive at the design?
• Structural Analysis and Connection Design of Bridge
• AISC 2005 as a reference for hand calculations
• SAP 2000 vs. RISA 3D
• Predictions?
• How do you think you will do at conference?
• Estimated cost calculation for bridge

11/28/2012

• Where are you at?
• 30% completed
• 60% will be completed by end of the semester
• 90% will be worked on over the winter break and completed by January 7, 2013
• 90% bridge design  deadline - January 7, 2012
• All analysis complete
• Ideally the bridge is ready to be built barring changes noted Dr. Hewes, Dr. Tuchsherer, and Thomas Nelson

11/30/2012

• Sap 2000 Model
• Internal forces in each member
• Accurately  model bridge
• Releases
• Replication

12/17/2012

Members: Ryan Mahar & Michael Bechtel
Time 9:30-12:00 1:00-2:00

• Bridge Type Analysis
• Number of Members/Connections Analysis
• Design Matrix: Truss Type
• Design Matrix: Bar Type

12/18/2012

Members: Ryan Mahar, Michael Bechtel & Calvin Ing
Time 10:30-2:00

• Break down members into 2 groups
• Make Member Forces Spread Sheet
• Adjust SAP Model

12/19/2012

Members: Ryan Mahar

• SAP 2000 Modeling:
• Moment Envelope
• Stationing for Load Cases
• Meeting with Dr. Tuchsherer
• Steel Manual Review
• SAP Model Review

12/20/2012

Members: Calvin Ing, Ryan Mahar, Michael Bechtel

• Member Sizing using AISC Manual
• Bridge Shirt Ideas
• Design Report Drafting

12/21/2012

Members: Calvin Ing, Ryan Mahar, Michael Bechtel

• Sap 2000 Modeling
• Moment/Shear Envelope
• Point Loading
• Distributed Loading

12/22/2012

Members: Calvin Ing, Ryan Mahar, Michael Bechtel

• Member Sizing based load cases
• Member force calculations based upon section properties
• Solid pipe
• Circular pipe
• Square HSS
• Square tubing Chosen 1.25”x1.25”x.125”
• Meeting with Thomas Nelson
• Truss connection ideas
• Rebar for diagonals
• Calculation checks

12/23/2012

Members: Calvin Ing, Ryan Mahar, Michael Bechtel

• Failure Modes Analyzed
• Bolt tear out
• Bolt Shear
• Bolt Hole Elongation
• Rebar pullout
• Welding Strength

12/27/2012

Members: Calvin Ing

• Failure mode: Local diagonal deformation analyzed.

1/3/2013

Members: Michael Bechtel

• Design Report Draft
• Autocad models of bridge types
• Rough draft of project alternatives

1/4/2013

Members: Calvin Ing, Ryan Mahar, Michael Bechtel

• Rough Estimates for total weight, material, connections, build time, competition cost
• Estimate for Square tubing material
• Continuation of Failure local diagonal deformation analyzed.
• Design Report Drafting

1/7/2013

Members: Calvin Ing, Michael Bechtel

• Design Report Drafting
• Meet with Thomas Nelson
• Corrections needed?
• Pictures needed?

1/8/2013

Members: Calvin Ing, Ryan Mahar, Michael Bechtel

• Re-check bolt diameters
• Re-check k-connection
• Re-check calculated values
• Lateral deflection hand calculations
• Shirt Design
•  Re-evaluate total score and compare it to last year

1/9/2013

Members: Calvin Ing. Michael Bechtel

• Block Shear
• Shear Lag
• Re-check thickness of rebar pullout
• Adjusted AutoCAD drawing to accurately display model

1/10/2013

Members: Calvin Ing, Michael Bechtel, Ryan Mahar

• J-2 Analysis
• K-weld Analysis
• Diagrams for J-2, J-1, and forces

1/11/2013

Members: Calvin Ing, Michael Bechtel, Ryan Mahar

• J-2, J-3 Analysis
• Diagrams for shear lag, bolt sizing, bearing strength sleeve, K connection
• Chord Plastification for K connection
• Design Report Drafting

1/14/2013

Members: Calvin Ing, Michael Bechtel, Ryan Mahar

• J-2/J-3 correction
• Lateral Deflection
• Support Design

1/15/2013

Members: Calvin, Michael, Ryan

• Readjust Sap Model
• Dimensioned Bridge for Lateral Bracing using Bridge Envelope

1/16/2013

Members: Calvin, Michael, Ryan

• Support Design
• Support Connection
• Member-Member Inner sleeve connection due to Bolt length
• Analysis of Inner sleeve for M-M connection

1/21/2013

Members: Calvin

• Lateral Support Design
• Lateral Bracing Design
• Lateral CAD Drawings

1/24/2013

Members: Calvin, Michael, Ryan

• Presentation
• Power Point
• Diagrams for each connection

1/25/2013

Members: Calvin

• Lateral Support Update
• SAP Model Update

1/28/2013

Members: Calvin

• SAP Model Update