ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.
Issue link: http://www.aspiremagazinebyengineers.com/i/485551
FHWA FHWA Initiatives Advancing the state of practice in bridge design arch. by Reggie Holt and Dr. Brian Kozy, Federal Highway Administration The Federal Highway Administration (FHWA) Office of Bridges and Structures routinely develops training and guidance on engineering technologies that improve the safety, durability, and longevity of our nation’s bridges. FHWA has recently completed several technology deployment projects intended to advance the state of practice for bridge engineering. This article provides a general overview of a few of these projects, as well as describing other on-going projects. POST-TENSIONING MANUALS AND TRAINING The recent advances in post-tensioning (PT) technologies have resulted in many FHWA deployment activities focused on this topic. The products listed below cover multiple aspects of post-tensioned bridges, including design, construction, and inspection. Post-Tensioning Tendon Installation and Grouting Manual and Training This manual includes state-of-the-art information relative to materials, PT systems, construction practices, and grouting of PT tendons for bridges. The manual is targeted at owners and private company personnel that may be involved in the design, inspection, construction, or maintenance of bridges that contain PT tendons. This manual serves as a reference and guide to designers, inspectors, and construction personnel for PT materials, installation, and grouting of bridge tendons. Complementary web-based training for this manual is under development. The estimated available date for this training is May 2015 on the National Highway Institute’s (NHI) website. Post-Tensioning Tendon Inspection Training Module A 30-minute lesson was developed on routine inspections of posttensioned bridges. The lesson provides an introduction to PT principles and components as well as a list of good inspection techniques. In addition, the lesson provides guidance on routine inspection findings that would initiate supplementary investigations such as in-depth or special inspections. The techniques highlighted in this lesson can be performed by a typical inspection crew. This lesson is part of the Bridge Inspection Refresher Training course and can be scheduled through the NHI. BRIDGE ANALYSIS AND DESIGN MANUALS AND TRAINING Over the last few decades, significant advancements have been made in the way that bridge engineering analysis and design can be performed. Engineering practitioners today, with the aid of advancing computer technology, are able to solve engineering problems of great complexity and produce designs and analysis that are more refined and more reliable than in the past. The products listed below promote practical implementation of advanced techniques for improved bridge engineering. LRFD Seismic Analysis and Design of Bridges Reference Manual and Training This manual is intended to provide a technical resource for bridge engineers responsible for both force-based and displacement-based seismic analysis and design. The manual covers fundamental topics such as engineering seismology, seismic and geotechnical hazards, capacity design, structural dynamics, and methods for modeling and analyzing bridges subject to earthquake ground motions. It also discusses the requirements and recommendations of the seismic provisions in each of the AASHTO LRFD Bridge Design Specifications, AASHTO Guide Specifications for LRFD Seismic Bridge Design, and AASHTO Guide Specifications for Seismic Isolation Design. There is complementary, instructor-led training that can be scheduled through the NHI.