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原文传递 Anchorage Design Solution for Attaching an Approved Traffic Barrier to Multivoid Aluminum Bridge Decks

题名：	Anchorage Design Solution for Attaching an Approved Traffic Barrier to Multivoid Aluminum Bridge Decks
正文语种：	eng
作者：	Annan, Charles-Darwin;Cormier, Martin;Fafard, Mario
作者单位：	Univ Laval Dept Civil & Water Engn Quebec City PQ G1V 0A6 Canada;Stantec 400-375 Blvd Roland Therrien Longueuil PQ J4H 4A6 Canada;AluQuebec Ctr Expertise Aluminium CeAI Montreal PQ H2Y 1N9 Canada
关键词：	Traffic barrier;Extruded aluminum bridge deck;Anchorage design;Numerical crash simulation;Validation and verification
摘要：	Bridge decks are the most stressed elements in a highway bridge due to direct loading from vehicular traffic and occasional overloading, combined with stresses induced by environmental effects and the use of deicing salts in cold wintery conditions. The use of structural aluminum alloys offers considerable promise for building modern bridges and for redecking aging and deficient bridges. Traffic barriers are mounted on bridge decks to provide a physical impassable limit to redirect errant vehicles safely onto the roadway. Current design standards require that the traffic barrier and anchorage system be physically tested under full-scale crash conditions to assure satisfactory interaction with impacting vehicles at the desired level of performance. Certain modifications to an already crash-tested and approved barrier may be permitted if it can be demonstrated by comprehensive analyses that they would not adversely affect the designed performance of the safety barrier. The present study seeks to develop and validate an anchorage design for attaching an already approved traffic barrier on bridge decks made from welded multivoid aluminum extrusions. The anchorage design facilitates installation and is able to absorb vehicular impact loads without compromising the structural integrity of the aluminum bridge deck. The study consists of two stages: (1) the capacity design and analysis of the attachment system based on equivalent static forces, and (2) a dynamic simulation of a full crash-test. This is followed by an approved procedure for verification and validation of the barrier-vehicle interaction, by comparing simulation results with observations from the original physical crash test. (C) 2021 American Society of Civil Engineers.
出版年：	2021
期刊名称：	Journal of structural engineering
卷：	147
期：	7