Category : Infrastructure

An experimental analysis of railroad spike maul methods

Gray, B.A. and W.S. Marras. 1989. An experimental analysis of railroad spike maul methods. Human Factors: The Journal of the Human Factors and Ergonomics Society. 31 (3): 335-344. doi:10.1177/001872088903100307.

This study investigated differences in railroad spike maul methods between experienced track workers and novice subjects. Differences were analyzed by developing a quantitative measure of the orientation of the spike maul path during spiking. The relationship between spiking motion pattern and spiking performance in both novice and experienced subjects was also investigated. Subjects were videotaped…

An Analytical and Experimental Evaluation of Concrete Cross Tie and Fastener Loads

This report had been prepared as part of the Improved Track Structures Research Program sponsored by the Office of Rail Safety Research of the Federal Railroad Administration. The report covers a reviews and evaluation of track analysis models and predicting tie and fastener loads. The principal track analysis model selected includes the effects of tie…

An Investigation of Concrete Ties and Rail Fasteners

During the past four years, the Department of Civil Engineering, San Jose State College, San Jose, California, has assisted in an extensive research and development program for the Ben C. Gerwick Company, Sand Francisco, California, in the development of mass transit and main line railroad prestress concrete ties. The program included the following: Rail seat…

Concrete and Wood Tie Performance, 425 MGT

This study is the third in a series which has reviewed the performance of concrete and wood tie track at the Facility for Accelerated Service Testing (FAST). It presents an evaluation of both types of track through 425 million gross tons (MGT) of service in the FAST Track at the Transportation Test Center (TTC), Pueblo,…

Concrete and Wood Tie Track Performance through 150 Million Gross Tons

This report has been prepared as part of the Improved Track Structures Research Program sponsored by the Office of Rail Safety Research of the Federal Railroad Administration. The report presents an evaluation of concrete and wood tie track performance from test data taken at the Facility for Accelerated Service Testing (FAST). The evaluation examines track…

Correlation of Concrete Tie Track Performance in Revenue Service and at the Facility for Accelerated Service Testing. Volume I – A Detailed Summary

This report is the first of three volumes which describe a comparative study of concrete tie track in the U.S. revenue service and at the Facility for Accelerated Service Testing (FAST). The work was undertaken to develop an understanding of the degree to which FAST represents the “real world” of revenue service. The loading environment,…

Correlation of Concrete Tie Track Performance in Revenue Service and at the Facility for Accelerated Service Testing. Volume II – Predictions And Evaluations of Track Settlement

Predictions and evaluations of settlement were made for revenue and the Facility for Accelerated Service Testing (FAST) track, both containing concrete and wood tie sections. The ballast physical states were investigated by field tests done before and after track maintenance. Borings were also taken to identify the subgrade conditions. The stress-dependent elastic and inelastic ballast…

Development of Safety Criteria for Evaluating Concrete Tie Track in the Northeast Corridor – Remedial Projects Assessment (Volume 1)

Minor problems with the performance of some track components have been noted in Northeast Corridor concrete-tie track. Performance-related events have been caused primarily by short-duration impact loads due to wheel tread or rail running surface roughness. To reduce these occurrences, remedial projects were initiated by Amtrak. These included the development of a wheel impact load…

Effects of Crossties and Fasteners on Rail Wear and Gage Strength in Heavy Axle Load Service

The effects of crosstie and fastener configurations on rail performance in heavy axle load service was evaluated in a controlled experiment. Transportation Technology Center, Inc. (TTCI) has conducted rail wear analysis on a variety of tie and fastener test zones on Section 25 at the Facility for Accelerated Service Testing (FAST). The performance of this…

Evaluation of Tie Plate Cracking on Composite Ties

Transportation Technology Center, Inc. (TTCI), in Pueblo, Colorado, conducted a study to determine the effect of tie stiffness on the durability of tie plates mounted on plastic and wood ties on the High Tonnage Loop (HTL) at the Facility for Accelerated Service Testing (FAST). Recently, several tie plates mounted to plastic ties have failed under…

Improving Performance of Crossties and Fasteners

In a three-phase program, Transportation Technology Center, Inc. is comparing the performance of various crossties and fastener designs under heavy axle loads to identify problems with current design and materials (Phase 1), to quantify the load environment (Phase 2), and to recommend design guidelines (Phase 3).

Investigation of the Effects of Tie Pad Stiffness on the Impact Loading of Concrete Ties in the Northeast Corridor

This investigation was conducted in response to the discovery in June 1980, that rail seat bending cracks had developed in many concrete ties which has been in service on the Amtrak Northeast Corridor track for periods of a few months. The study was initiated by the Federal Railroad Administration to investigate the cause of the…

Laboratory Investigation of Prestressed Concrete Crossties and Fasteners Manufactured in the U.S.S.R.

Soviet manufactured prestressed concrete crossties and fasteners were tested using AREA Bulletin 655 as a guide. The ties were subjected to the following tests: Rail Seat (Positive and Negative moment) Rail Seat Repeated Load Tie Center (Positive and Negative moment) Rail Seat Ultimate and Tendon Anchorage Fastener Uplift Fastener Repeated Load Fastener Longitudinal Restraint Electrical…

Laboratory Investigation of the Nucor Two-Block Steel and Concrete Tie with Viseking Fastening System

A series of tests were conducted on two-block concrete ties and their associated fastening systems, as supplied by the Nocur Corporation. These ties and fastening systems were tested in accordance with the requirements of the American Railway Engineering Association (A.R.E.A) specifications. The Nucor Concrete Tie and associated Viseking Fastening System met the requirements of the…

Laboratory Measurement of Ballast-Tie Interface Pressures using Matrix Based Tactile Surface Sensors

In order to understand the load environment of the ballast and tie, Transportation Technology Center, Inc. (TTCI), in cooperation with the University of Kentucky, used matrix based tactile surface sensors (MBTSS) to study the pressure distribution at the ballast-tie interface. MBTSS technology allows the loads generated from individual ballast particle contact points to be measured…

Laboratory Study to Determine the Effects of Tie Pad Stiffness on Attenuation of Strain in Concrete Ties

The effect of tie pad stiffness on the bending moments produced by impact loading of concrete railroad ties was investigated in laboratory tests. Controlled impact loads were applied to a one-tie test arrangement in which the pads were interchanged. Beginning with a rigid plastic pad currently in use on the Northeast Corridor track, the test…

Measurement and Correlation Analysis Plan for Concrete Tie and Fastener Performance Evaluation

This report was prepared as part of the Improved Track Structures Research Program sponsored by the Office of Rail Safety Research of the Federal Railroad Administration. The report presents an experiment plan and a correlation methodology through which the long-term performance of concrete tie track will be evaluated. The experiment plan defines test segments, instrumentation…

Measurements of Rail/Tie Clip Strains at the Facility for Accelerated Service Testing

Measurements of rail-to-tie deflections and fastener clip strain were made on both concrete and wood tie track at the Facility for Accelerated Service Testing (FAST) in October 1980. These measurements were made to provide a data base for duplicating, if possible, these deflections and strains in a laboratory. The laboratory tests would serve as the…

Modern Concrete Crosstie Practice in France and Mexico

(1) Considered briefly is the history of concrete crosstie development in France. Failure of some crossties in 1973 led to determination of the failure modes and a rigorous analysis of the service load limits to be taken into account. New crosstie designs evolved from this investigation. Technical specifications and acceptance tests for crossties fabricated according…

On the Component of Track Damping Resistance and Related Damping Measurements

This paper present analytical equations for estimating the damping resistance of railway tracks based on the model of a single infinite beam supported by a Kelvin foundation. Considering practical range of speed and track parameters, a simplified formula for estimating the damping resistance was obtained. Using this formula, graphs were presented of the damping resistance…

Railroad Accident Brief

On April 3, 2005, about 9:35 a.m., westbound Amtrak (National Railroad Passenger Corporation) passenger train No. 27, consisting of a single locomotive unit and four passenger cars, derailed at milepost (MP) 58.562 on the BNSF Railway Company’s (BNSF’s) Northwest Division. The train was traveling 60 mph on single main line track when it derailed as…

Static, Dynamic and Spike-Pull-Out Tests on Concrete Bridge Ties

AREA Committee 8 – Masonry – requested the testing and evaluation of 9 in x 10-1/2 in. cross section prestressed concrete bridge ties by the Association of American Railroads Research and Test Department. The work was done by the AAR in cooperation with the Portland Cement Association and AREA Committee 8 studies on design of…

Structural Response of the BART Concrete Ties

The primary objective of this project is to obtain an indication of the structural response of five concrete ties instrumented with electrical resistance strain gages, when subjected to moving loads from BART trains. In preparation for the collection of field data from strain gage readings of the ties in track, five concrete ties were removed…

The Effect of Service Loading on the Bending Strength of Concrete Ties

Concrete tie bending strength tests were conducted by Battelle-Columbus Laboratories at Columbus, Ohio, as part of the Tie and Fastener Verification Studies contract (DOT-FRA-1652) sponsored by the FRA Office of Rail Safety Research. The object of the testing was to determine the effects of service loading on the strength of concrete ties to formulate assumptions…

Update: New Crosstie and Fastening System Test at FAST

Transportation Technology Center, Inc. has been evaluating and reporting on the evolution of premium railway crossties and fastening systems designed for heavy axle loads since the beginning of the Heavy Axle Load Program in 1988. During that time, suppliers have developed components that help extend the life of the ties and provide increased overall track…

Withdrawal Resistance of Cut Track Spikes in Wood Railroad Crossties

This report presents the procedure and results from the tests or withdrawal resistance of cut track spikes driven into wood crossties. The tests were performed using conventional track spikes and chemically treated wood crossties, both solid and prebored. Five different, by common, crosstie materials were used, which included three hardwoods and two softwoods. Each test…

A Direct Comparison of the Traditional Method and a New Approach in Determining 220 Transfer Lengths in Prestressed Concrete Railroad Ties

This paper presents the detailed analysis of surface strain data obtained at six prestressed concrete tie plants in the United States. These data were obtained by the authors by conducting a total of 220 transfer length measurements on prestressed concrete railroad ties with different concrete-mix designs and reinforcement variations. The surface strain profiles of the…

Air Entrainment and the Fabrication of Concrete Railroad Ties

Handling and vibration can affect the air content of prestressed concrete railroad ties. The amount and variation in vibration experienced in concrete railroad ties were investigated to determine the concrete fabrication conditions typically used. Two methods of fabrication were investigated by measuring the concrete properties and vibration exposure during placement at two concrete tie manufacturing…

An Integrated System for Accurate Tie and Ballast Condition Assessment

With trends in increasing rail traffic and the related increases in total annual tonnage hauled, the ability to apply consistent and regular maintenance procedures for the efficient management of track infrastructure in the context of diminishing track access times, and limited maintenance budgets is becoming increasingly more difficult. The historical approach of scheduling large consolidated…

Concrete Maintenance Ties: Interspersal in Existing Wood Track

Cross ties are a constant focus of track maintenance programs as railroads continually strive for improvement. Cross ties are not the most expensive track structure component, yet their performance plays a vital role. Traditionally the wood cross tie has been the predominant cross tie of choice, however, increasing economic, environmental, and performance pressures have led…

Determining Transfer Length in Pre-Tensioned Concrete Railroad Ties: Is a New Evaluation Method Needed?

The transfer length is perhaps the most significant KEY indicator of the bond quality between reinforcing wire/strand and concrete, and its measurement in pre-tensioned concrete railroad ties can enable concrete tie producers to identify problem ties before they are put into service. The 95% AMS method is the traditional method used to determine the transfer…

Development of a Multilayer Analysis Model for Tie/Ballast Track Structures

A multilayer analysis model for tie/ballast track structures has been developed. The model includes the effects of rail bending, rail fastener stiffness, tie bending, variable ballast and subgrade material type, and variable tie spacing and ballast depth. Predicted results from the model are compared with experimental results and excellent agreement is shown. The model offers…

Development of a Parametric Model for Prediction of Concrete Railway Crosstie Service Bending Moments

Concrete crosstie usage in North America continues to increase for rail transit and heavy axle load (HAL) freight railroad applications. As such, it is important to design optimized crossties to save both capital and maintenance funds. Recently, a method for quantifying concrete crosstie bending moments using concrete surface strain gauges has been developed, deployed, and…

Development of Eco-Friendly PC Sleeper Using Slag

Cement is one of the main construction ingredients. On the other hand, it causes the environmental impacts. In other words, carbon dioxide (CO2) emissions from the cement production have been recently one of the main social issues. In Korea, five types of Portland cement are defined and standardized by the KS (Korean Standards), especially high-early-strength…

Effect of Concrete Properties on Transfer Lengths in Concrete Rail-Road Ties

This paper presents findings from a current research project titled “Quantifying the Effect of Prestressing Steel and Concrete Variables on the Transfer Length in Pretensioned Concrete Crossties” that is funded by the Federal Railroad Administration (FRA). Specifically, the paper focuses on the effect of concrete properties on the resulting transfer lengths. These properties include concrete…

Environmental and Track Factors that Contribute to Abrasion Damage

Sites with known occurrences of mud pumping or other track concerns were investigated to determine the prevalence of concrete bottom tie abrasion and environmental and track conditions that could contribute to its occurrence. Field investigations showed that it occurs in diverse geographic locations around the U.S. and is a source of continued maintenance concern for…

Experimental Field Investigation of the Effects of Lateral Load Distribution on Concrete Crosstie Track

Increasing freight train axle loads and continued development of high speed rail has placed significant demands on North American rail infrastructure. To adequately address these demands, concrete crosstie and elastic fastening system design and performance must be improved. Field experimentation was conducted at the Transportation Technology Center (TTC) by researchers from the University of Illinois…

Field Measurements and Proposed Analysis of Concrete Crosstie Bending Moments

As the use of concrete crossties increases for heavy-haul freight railroad lines in North America, it is becoming more critical to quantify their flexural performance in revenue service traffic in an effort to improve upon design recommendations and maintenance practices, leading to longer service lives, lower life cycle costs, and fewer in-service failures. Currently, center…

Flexural Analysis of Prestressed Concrete Monoblock Crossties: Comparison of Current Methodologies and Sensitivity to Support Conditions

Throughout the international railway community, many methods have been developed to analyze the flexural demand of concrete crossties. The investigation described in this paper serves to clarify and improve upon the current language found in the American Railway Engineering and Maintenance-of-Way Association (AREMA) recommended practices for the design of prestressed concrete monoblock crossties. Specifically, this…