Civil Engineering

 

Date of this Version

12-2011

Comments

A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science, Major: Civil Engineering, Under the Supervision of Professor Dean L. Sicking. Lincoln, Nebraska: December, 2011

Copyright (c) 2011 Benjamin J. Dickey

Abstract

A guide for the design of epoxy anchors for the use in concrete traffic barriers was developed in this study. A series of dynamic bogie tests and static tests was conducted on single and double anchors. The dynamic increase factor for the noted anchors was determined to be 1.06. Protective epoxy coatings for the anchors was observed to contribute to a 9 percent decrease in anchorage strength. The effects of anchors located in close proximity to each other was also investigated. Calibration factors were developed to apply recommended changes to the ACI code for use in bridge rail anchorages.

A load model was developed to estimate the lateral impact loads for non-articulated vehicular crashes into rigid barriers with an impact severity of up to 300 kip-ft (407 kJ). This model was determined from a regression analysis of data obtained from full-scale crash tests. The model consists of a single equation that is a function of the impact severity. This load model was recommended for use with the yield-line analysis procedure to determine the proper anchorage design for bridge railings.

Advisor: Dean L. Sicking

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