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ABCD What’s New In Bridges
Tim Keller, P.E. Administrator ODOT Office of Structural Engineering ABCD March, 2018
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Agenda New Faces at OSE New Steel Provisions in 8th Edition LRFD
Vandal Fence Update BDM Update MASH Update SMS Update Rebar Discussion Spread Box Discussion Interesting Video ABCD March, 2018
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Personnel Changes Two members of OSE passed away last year
Scott Seeley Bob Sliwinski OSE has a new face Jon Huffman ABCD March, 2018
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8th Edition LRFD Specifications
8th Edition is published and available Dated November 2017 AASHTO is updating LRFD Specifications every 3 yrs. with no interims ABCD March, 2018
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8th Edition LRFD Specifications
AISC and NSBA have put together a nice presentation describing the changes in the Steel Provisions NSBA will give a presentation at OTEC going into more depth. ABCD March, 2018
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New Steel Provisions LRFD
A few of the major changes are: New Simplified Bolted Splice Procedure Removed the 75% and average rules in for flexural members New design procedure is in NSBA has published an overview document and design examples NSBA has a spread sheet available ABCD March, 2018
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New Steel Provisions LRFD
2. Introduction of ASTM F3125 Combines A325, A490, F1852, and F2280 into a single specification Group A – 120 ksi min. tensile Group B – 150 ksi min. tensile ODOT will add a proposal note to deal with this in short term. Long term we will change all the references – will take a little time. ABCD March, 2018
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New Steel Provisions LRFD
3. Revised bolt resistance calculations in , , and Table Generally, this will result in fewer bolts required for shear 4. New Article introduced A. Designates where Charpy V-notch testing is required ABCD March, 2018
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New Steel Provisions LRFD
5. Increase the Fatigue Load Factors in Table Increase in Maximum Shear Connector Spacing in 6.17 ABCD March, 2018
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Vandal Fence Update Permanent VPF – BDM Section 305 requires installation of permanent VPF on most of our grade separations bridges when we are replacing the existing barrier. Exceptions are bridges over County/Township routes Exception process for fencing that will create a substandard site distance ABCD March, 2018
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Vandal Fence Update Temporary Vandal Fence District 2 incident
Stage construction only New guidelines are coming out Don’t mount temporary vandal fence on portable concrete barrier in high speed locations Don’t mount temp. vandal fence on existing concrete barrier that is cracked and spalling Preferred location is to mount temp. vandal fence on deck behind PCB (if room is available) ABCD March, 2018
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BDM Update 2018 OSE goal is to combine the two manuals.
Section 400 Rehabilitation and Repair - major changes Rehabs will comply with LRFD Specs Overlays – changes will include: Adding treatments Adding guidelines for picking treatments ABCD March, 2018
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MASH Update Self Certification has a new name - State Determination
Still waiting on FHWA guidance ODOT submitted 2 to Division Office Concrete median barrier which is un-reinforced (crash tested system but did not have final report before Jan. 1 implementation) G/R with round wooden posts ABCD Marcg, 2018
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SMS Update Proposals were submitted to ODOT for replacement of current SMS Proposals are currently being evaluated Target for 2018 – new system operating in an ODOT test environment ABCD March, 2018
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Mild Reinforcing Steel
Confused ? What about: Sales People in your ear? Stainless Clad Epoxy Coated – is it performing well? FRP MMFX Fusion bonded ASTM A934 ABCD March, 2018
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Spread Prestressed Box Beam Bridges
Use or not to use ? Advantages and Disadvantages Cross frames or no cross frames Deck thickness Details over piers Overhangs or no overhands ABCD March, 2018
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Ironton Russel Bridge ABCD March, 2018
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Ironton Russel Bridge ABCD March, 2018
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Ironton Russel Bridge ABCD March, 2018
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Ironton Russel Bridge ABCD March, 2018
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Questions for me ABCD February, 2018
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