OPENING REMARKS 2019 Rating & Design Bridge User

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Presentation transcript:

OPENING REMARKS 2019 Rating & Design Bridge User Group (Radbug) meeting July 30, 2019 South Lake Tahoe, CA Dolores Valls, Caltrans State Bridge Maintenance Engineer

Welcome to California South Lake Tahoe – Ski, hike, bike, boat, sunsets, etc… California Department of Transportation (Caltrans) Recent Events: Earthquakes of all magnitudes! July 4, 2019 Ridgecrest, CA – 6.4 Magnitude July 5, 2019 Ridgecrest, CA – 7.1 Magnitude 15,000+ Aftershocks NO BRIDGE DAMAGE REPORTED TO DATE

Introductions - Self Dolores Valls, PE “Titles”: State Bridge Maintenance Engineer Chief, Structure Maintenance & Investigations (SM&I) Deputy Division Chief, Division of Maintenance AASHTO Committee on Bridges & Structures T-1 Bridge Security & Hazards T-18 Bridge Management, Evaluation, and Rehabilitation T-20 Tunnels

Introductions of Caltrans Staff Gudmund Setberg State Bridge Design Engineer Kevin Keady State Bridge Load Rating Engineer Vinacs (Murugesu Vinayagamoorthy) Senior Bridge Engineer Specialist George Huang Senior Bridge Engineer, Supervisory Dave Ward Senior Bridge Engineer, Supervisory Darren Stauts Jun Jung

Overview – Caltrans Structure Design Division of Engineering Services Headquarters in Sacramento, satellite office in Diamond Bar, CA 205 Bridge Designers Additional 10% consultant resources Bridge Design Software Technical Team (20 BrD licenses under evaluation) Question: May we extend time of 90 days trial ???

Overview – Caltrans Bridge Load Rating Performed in Structure Maintenance & Investigations Currently 32 full-time Bridge Load Rating Engineers (has been 8 to 40+ engineers) Consultant Contracts (in process) Expansion after 2008 FHWA Program Review Finding: Caltrans has electronic files with “moment only” ratings but original software is no longer available. Also, no backup calcs on file and ratings were not updated or maintained. Metric 13 PCA’s (since 2011)

Caltrans & Radbug Started using AASHTOWare (“BrR”) in 1994 Over $1 Mil investment in service units for Modernization and Enhancements Thank YOU for your patience with state accounting process! Primary software used for load rating 6762 bridges load rated using AASHTOWare BrR product

Caltrans Bridge load rating factoids 24955 California NBI Bridges: 53% Bridges have a “CALCULATED” Rating 21% Bridges have “Assigned by Design” Rating 12% Culverts have “Assigned by Design” Rating 6% Bridges have “Assigned NO PLANS Available” Rating 8% Bridges are under review/rerating

Caltrans load rating Factoids Of the 13,900 Bridges that have a “Calculated Rating”: 40% of bridges were load rated using LRFR 55% bridges were load rated using LFR 5% bridges were load rated using ASR

Caltrans Load rating Priorities Not just “California Issues”: Calculation of Shear (CIP PT box girder bridges) Curved girders Influence of differential skews (variable skew, variable widths) Speed/ Efficiency of the Software engine Long Lead time for software enhancements Load Rating for Tunnels Load Rating for RC Culverts (improvements) and Metal Culverts

Thank you!!! Thanks to all of you for your time commitment to this important work. Get outdoors while you are here!