Robuta

https://railtec.illinois.edu/article/statistical-prediction-of-center-negative-bending-capacity-of-pretensioned-concrete-crossties/ Statistical prediction of center negative bending capacity of pretensioned concrete crossties -... statistical prediction center negative pretensioned concrete bending capacity https://trid.trb.org/View/32140 TIME-DEPENDENT PRESTRESS LOSSES IN PRETENSIONED CONCRETE CONSTRUCTION - TRID pretensioned concrete time dependent prestress losses