THE CONCRETE BRIDGE MAGAZINE

WINTER 2018

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.

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curriculum, which has compounded the need for guidance. To address this gap, the Federal Highway Administration (FHWA) has developed new STM training and design examples that follow the provisions in the 8th edition of the AASHTO LRFD specifications. The FHWA training course and guidance are based on the 8th edition because AASHTO has made significant changes to the STM provisions and substantially reorganized Section 5: Concrete Structures, resulting in many changes to this section's content and article numbering. Four comprehensive design examples are available on the FHWA bridge website (https:// www.fhwa.dot.gov/bridge/concrete/nhi17071 .pdf ). These design examples progress in complexity and include a simply supported beam, a cantilever bent cap, an inverted-tee straddle bent, and a three-dimensional model of a drilled-shaft footing. These design examples were selected to cover as many "real-life" STM bridge scenarios as possible. These design examples are a very valuable resource within the bridge design community (Fig. 4). The training is a one-and-a-half-day, instructor-led course delivered through the National Highway Institute (NHI). This training course will be available in the very near future. For more information, visit the NHI website (https://www.nhi.fhwa.dot.gov/home .aspx) and search for course number 130126. Acknowledgment FHWA acknowledges the Texas Department of Transportation (TxDOT) for its efforts and leadership in advancing the state-of- practice for strut-and-tie modeling. Much of the information used to develop the FHWA training and example problems came from completed TxDOT research, implementation, and guidance. The contributions of Dean Van Landuyt, John P. Vogel, David Hohmann, and Gregg Freeby of TxDOT and those of David Birrcher, Robin Tuchscherer, Matt Huizinga, D e a n D e s c h e n e s , C h r i s Wi l l i a m s , a n d Oguzhan Bayrak from the Ferguson Structural Engineering Laboratory at the University of Texas at Austin have been invaluable and are gratefully acknowledged. ASPIRE Winter 2018 | 47 Figure 4. Cover of Strut-and-Tie Modeling (STM) for Concrete Structures.

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