Automated System for Concrete Crosstie Transfer Length Measurement [Research Results]

Federal Railroad Administration2021PDFBriefStuart, CameronPeterman, Robert J.Beck, B TerryUnited States. Federal Railroad Administration. Office of Research, Development, and TechnologyLB Foster/CXT Conrete TiesJohn A. Volpe National Transportation Systems Center (U.S.)Advanced Manufacturing Institute (AMI)Voestalpine NortrakRocla Concrete TiesKSA Concrete TiesUnited States. Federal Railroad Administration. Office of Research, Development & TechnologyUnited StatesInfrastructureRailroad tiesStrain gagesOptical instrumentsAggregates by shape and surface texturePrestressed concreteHigh speed railstrain sensoropticaltransfer lengthshape factorRR 21-17Stuart, Cameron DResearch ResultsThis research result was part of a larger project entitled, \u201cQuantifying the Effect of Prestressing Steel and Concrete Variables on the Transfer Length in Pretensioned Concrete Crossties,\u201d conducted by Kansas State University (KSU) and sponsored by the Federal Railroad Administration (FRA). This report documents the advances made to determine the transfer length of pretensioned concrete railroad ties using non-contact (optical) strain measurement and digital image correlation. The full technical report can be downloaded from the K-State Research Exchange.119