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Analysis of Cracking of I79 Bridge at Neville Island
A large crack was discovered to form in a girder of the I-79 Glenfield Bridge over the back channel of the Ohio River near Pittsburgh on January 28, 1977. A section of the girder containing...

Investigation of Catastrophic Failure of a Premium-Alloy Railroad Rail
In November 1983 an Amtrak train derailed at a speed of 72 mph (115 kph) at Woodlawn, Texas (in the vicinity of Marshall, Texas), resulting in four fatalities and twenty-four serious injuries....

Continuum Modeling of Periodic Truss Structures
Procedures for deriving equivalent stiffnesses for an extended Timoshenko beam used to represent truss beams are presented. A typical substructure of a truss is used to calculate these...

Continuum Modeling of Discrete Structures with Geometric Nonlinearities
The modeling of geometrically non-linear discrete structures by an equivalent continuum is presented. The discrete-continuum analogy is developed by first isolating a unit cell of the...

Use of Computer Graphics in the Analysis of Large Space Structures
This paper illustrates how interactive computer graphics can provide a useful tool in setting up analytical models of structural latticeworks comprised of large numbers of degrees of freedom...

Damage Detection in Periodic Structures
Nondestructive damage detection in periodic structures using continuum analogues of the discrete structure is studied. Algebraic equations relating changes in eigenfrequencies to the fractional...

Evaluating Nonlinear Soil Behavior Using the Resonant Column
An analysis is presented that attempts to match a mathematical model to the nonlinear behavior obtained from the resonant column test. This model consists of an oscillator with a restoring...

Centrifuge Model Testing with Dynamic and Cyclic Loads
This paper examines the use of small-scale tests on centrifuges to study a wide range of problems in soil dynamics - including machine foundations, structures and explosion effects. The...

Energy Forecasting Techniques: An Overview
This paper provides an overview of the primary forecasting techniques employed by electric and natural gas utilities to predict energy consumption and demand. Although the techniques discussed...

Development of Flood Peak Regression Equatins for Small Watersheds in Southwest Florida
Hydrologic investigations were performed on the Belle Meade-Royal Palm Hammock area in Collier County, Florida. The study area, encompassing approximately 79 square miles (205 km**2),...

Streamflow Losses in the Santa Cruz River, Arizona
The discharge and volume of flow in a peak decrease as the peak moves through an 89-mile (143 km) reach of the Santa Cruz River. An average of three peaks per year flow the length of the...

Use of Microcomputers in Transportation: Potential, Limitations and Future Trends
An overview is given of the existing programs for microcomputer applications in transportation with emphasis in software for traffic analysis and management. The impacts of the increased...

Transportation Systems Forecasting Using Microcomputer Models
This paper describes the evaluation of six transportation forecasting programs which operate on microcomputers. The evaluation is undertaken from the perspective of a metropolitan planning...

Managing Federal Aid Using Microcomputers
Wisconsin's federal aid for highway improvement is about 225,000,000 annually. The obligation authority (the ability to spend the federal aid) is limited to an estimated 162,000,000...

Status of Microcomputer Support Centers
In 1983 and 1984, the FHWA and UMTA established formal microcomputer User Groups in each of three transportation application areas assisted by a technical Microcomputer Support Center...

Field Data Collection for Traffic Studies
Microcomputer applications have emerged in all areas of traffic data collection, reduction and utilization. They have done much to improve the productivity and credibility of the data...

Queueing Applications for Stop Sign Operation
A pair of programs has been developed as a teaching tool to illustrate the application of simple queueing principles to transportation problems as taught in an introductory course in Transportation...

POSIT?An Interactive Timing Optimization Program
A window-oriented, microcomputer-based signal optimization program called POSIT (Program for Optimizing Signalized Intersection Timing) has been developed that provides traffic engineers...

Signal Software Engineering Tool or Black Box
This paper is intended to point out some of the many possible pitfalls ready to catch the unsuspecting traffic engineer who utilizes the microcomputer. The tremendous benefits of microcomputer...

Basic Considerations for the Planning and Implementation of an Urban Area Traffic Sign and Pavement Marking Microcomputer Based Inventory and Record Keeping System
This paper presents basic concepts and operations which are necessary to put into place a microcomputer based inventory system. The paper briefly examines past experience, discusses microcomputer...

 

 

 

 

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