TY - JOUR
AU1 - Loken, Andrew E.
AU2 - Steelman, Joshua S.
AU3 - Bielenberg, Robert W.
AU4 - Rosenbaugh, Scott K.
AU5 - Faller, Ronald K.
AB - Concrete post-and-beam bridge rails are a common bridge-rail type in the U.S. However, direct investigations of their performance on bridge-deck overhangs are rare, and current specifications do not clearly address this rail type or the design of decks supporting them. In this paper, the results of a performance case study of concrete bridge-rail posts on deck overhangs are presented. This study included (1) bogie testing of a MASH TL-4 concrete post on an instrumented deck, (2) development and calibration of a corresponding LS-DYNA model, and (3) use of the calibrated model to further describe system behavior, evaluate the effect of common design alternatives on performance, and corroborate the system performance from a full-scale crash test. The results of this study indicated that current design methods of the AASHTO LRFD Bridge Design Specifications (BDS) resulted in a significant underestimation of lateral capacity, partially because their neglect of inertial resistance. In the bogie test of the concrete post, over 40% of the peak lateral resistance of the post was attributed to inertial effects. Similarly, the calibrated LS-DYNA model indicated that the full-scale system could withstand a simplified single-unit truck (SUT) loading consisting of a 150 kip pulse load while only sustaining minor damage, despite having a BDS-predicted capacity of 73 kips. Additional findings included a characterization of deck demands, performance effects of design alternatives, such as edge distance and slab thickness, and the influence of using straight versus hooked transverse deck bars.
TI - Performance Case Study of Concrete Bridge-Rail Post on Deck Overhang
JF - Transportation Research Record
DO - 10.1177/03611981231175902
DA - 2024-02-01
UR - https://www.deepdyve.com/lp/sage/performance-case-study-of-concrete-bridge-rail-post-on-deck-overhang-hht6tpeI80
SP - 678
EP - 692
VL - 2678
IS - 2
DP - DeepDyve
ER -