Two Approaches for Characterizing Images of Rail Surface Flaws
Rail surface flaws can be removed by grinding to improve the life of rail and provide a safe, smooth running surface. To avoid time consuming and costly visual inspection in the determination...
CADD?Database Application for Facility Inspections
In 1989, the Sverdrup Corporation was hired to perform the Comprehensive Inspection of the Queens-Midtown and Brooklyn-Battery tunnels in New York City. From the onset of the project it...
Automated Analysis of Pavement Distress Data
A system model that can be used for the analysis of pavement distress data collected by various visual devices (e.g. photographic film) is presented. The models operate at two levels:...
Traffic Control System on the Hanshin Expressway
The Hanshin Expressway Public Corporation, Osaka, Japan has been developing and operating its automated traffic control system since 1969. This paper deals with the latest version of the...
Contact-Free IC Cards for New Railway Ticket Systems
Two types of smart cards which can communicate with an automatic gate machine without contact are developed. The first one uses medium wave radio as communication media. The microprocessor...
NOAA Collection and Dissemination of Marine Information
The National Oceanic and Atmospheric Administration's (NOAA) interest in marinas stems from our mandate to foster boating safety through the issuance of marine navigation products and...
Automating Airfield Condition Data Collection
This paper discusses the advantages and disadvantages of the newest technology for the data collection requirements of an airport interested in implementing a pavement management system....
ASCE Salary Survey 1991
The 21st biennial ASCE salary survey of the engineering profession conducted by the ASCE Committee on Employment Conditions during the first half of 1991 is presented. It consists of an...
Autocorrelation Functions for Offshore Geotechnical Data
Autocorrelation functions are described. Data from several North Sea sites are analyzed with respect to the vertical and horizontal autocorrelation of a number of soil properties. Based...
Bayesian Updating of Axial Capacity of Single Pile
The paper outlines a Bayesian technique to update predictions of pile driving and axial pile capacity on the basis of pile driving records. The approach enables one to systematically account...
Risk Assessment of Utility Network Systems Using Expert Opinions
This paper describes the application of an expert opinion and survey approach to the problem identification and risk assessment of engineering systems. The method of expert opinion for...
Durability and Damage Tolerance Evaluations of Jet Transport Structures
Many design considerations are involved in ensuring structural integrity of Boeing jet transports, which have common design features validated by extensive analyses, tests, and service...
Probabilistic Analysis of the Ghonem and Dore Data
A two-state Markov process model for fatigue crack growth is utilized with experimental fatigue crack growth data reported by H. Ghonem and S. Dore to study the effect of stress ratio...
Two Principles for Data Based Probabilistic System Analysis
A major problem in probabilistic system analysis is to find a self-consistent method of inference about probabilities based on a random sample of system state variables. Such a method...
The Extremes of Combinations of Environmental Loads
The objectives and the general approach of an offshore environmental data and extremal analysis are described. The intention is to develop long-term design values of wave, wind and current...
Statistical Analysis of Australian Ground Snow Loads
This paper is concerned with the statistical analysis of snow data from the alpine areas of southeastern Australia (above 1200 m). In these areas, the local variation is large and contour...
Analysis of Bridge Maintenance and Rating Procedures
In the United States, bridges are routinely rated to evaluate their existing conditions. The formula used to evaluate bridges is called the Sufficiency Rating Formula. The formula uses...
Bayesian Reliability Analysis of Structures with Multiple Components
This study develops a method of Bayesian reliability analysis to establish an optimal inspection schedule of structures with multiple components using the data collected during inservice...
Design Method Satisfying Safety Requirements for Various Limit-States Based on Information Integration Method
This paper discusses the applicability of the information integration method to optimum design of structures and the advantages of the above optimum structural design method over other...
Monitoring Vibration
Vibration monitoring for construction projects is increasing rapidly. Instrumentation for measuring structural response to blasting began in the mining industry with research by the U.S....
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