@inproceedings{f41631de88e34834a870e8cb68d1ccb9,
title = "Seismic performance of bridge slab-column joints with headed reinforcement",
abstract = "This paper presents results of an experimental and analytical investigation on the seismic performance and design of slab-column joints using headed bars as longitudinal column reinforcement. Three full-scale slab-column assemblies were tested under cyclic lateral loading to determine the embedment length of the headed reinforcement and the joint reinforcement details required to develop the full capacity of the longitudinal bars. Each of the specimens had a 2-ft. diameter, 12-ft. tall column and a 16-in. thick slab. The columns were connected to the slabs with headed bars with embedment lengths varying between 8.7 and 11 times the bar diameter. These lengths are shorter than the development length required by ACI 318. The reinforcement details for the slabs were based on Caltrans specifications. The results of the tests have indicated that with sufficient joint reinforcement, an embedment length equal to 11 times the bar diameter is sufficient to develop the full capacity of the headed bars and ensure an adequate seismic performance of the slab-column joint. Test specimens with shorter embedment lengths were able to develop the moment capacity of the columns but resulted in moderate to severe cracks in the top face of the slabs due to the punching action of the headed bars. The experimental results were complemented by numerical simulations using nonlinear finite element models, which confirmed that the anchorage performance is governed by the punching failure of the slab.",
author = "V. Papadopoulos and J. Murcia-Delso and Shing, \{P. B.\}",
note = "Publisher Copyright: {\textcopyright} 2018 All rights reserved.; 11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018 ; Conference date: 25-06-2018 Through 29-06-2018",
year = "2018",
language = "English",
series = "11th National Conference on Earthquake Engineering 2018, NCEE 2018: Integrating Science, Engineering, and Policy",
publisher = "Earthquake Engineering Research Institute",
pages = "151--155",
booktitle = "11th National Conference on Earthquake Engineering 2018, NCEE 2018",
address = "United States",
}