Condition Evaluation of Jointed Concrete Airfield Pavement
This paper describes the development and field verification of a Pavement Condition Index (PCI) for rating jointed concrete airfield pavements. The PCI, which is a measure of pavement...

Pumping Due to Unbiased Local Wall Oscillations
An approximate solution was used in the investigation of the flow generated by unbiased local wall oscillations. It was shown that such oscillations can pump fluid and maintain constant...

Loading Rate Effects on Compressibility of Sand
Stress-strain curves from 61 uniaxial strain tests are presented which depict the response of three dry sands to intense transient pressures; the loadings ranged from 10 MPa to 80 MPa...

Optimizing Joint Development at Transit Stations
The Detroit Metropolitan Area was used as the experimental site for such feasibility testing. Two priority ranking methodologies were developed based upon provisions of rating and ranking...

Multiobjective Power Plant Siting Methods
The assumptions of three commonly applied siting methods are examined, and prescriptions for proper use given. Exclusionary screening presumes that exclusion criteria cannot be violated....

Effects of Fire on Reinforced Concrete Members
Recently developed thermal and structural analysis techniques show considerable promise for alleviating the extensive testing otherwise required for determining fire ratings for structural...

High Altitude Photos for Inactive Mines
The utility of high altitude, 1:120,000-scale, color, infrared aerial photographs for inventorying inactive surface mines and assessing their environmental conditions was demonstrates...

Upcrossing Rate Solution for Load Combinations
An exact expression for the mean upcrossing rate of a sum of two poisson square-wave process representations of stochastic loading functions is used to explore the accuracy of an earlier...

Silicate-Stabilized Sands
Strengthening and stiffening of a chohesionless, sandy soil in-situ by means of injection of a silicate solution that gels with time, is a technique that is finding growing applicability...

Is Continuing Education Worth the Effort?
A pilot study was performed aimed at determining the relationship between measurable performance of engineers on the job and participation in continuing education (CE). It was expected...

Bridge Analysis and Rating System
In compliance with the requirements of the Highway Safety Act of 1968 and the National Bridge Inspection Standards promulgated by the Federal Highway Administration the Pennsylvania Department...

Nutrient-Uptake Model in Marsh Ecosystems
Mechanistic models of nutrient dynamics in natural wetlands were developed and applied in a study of Kissimmee River (Florida) flood-plain marshes. The models describe hydrodynamics and...

Stormwater Treatment Systems
Certain stormwater treatment devices reduce pollutant loads by effecting a reduction in contaminant concentration, without modifying the flows that they process (e.g., filters and screens)....

Nonlinear Creep of Concrete—Adaptation and Flow
A nonlinear integral-type creep law is developed by generalizing the linear superposition integral for the creep rate rather than the total strain. At low service stress level there is...

Ballistic Pendulums and Dynamic Testing of Clays
Ballistic pendulums provide simple and effective means of testing clays at constant rate of strain. Tests were performed at strain rates of 1,400%/sec and 2,300%/sec. Increasing stiffness...

Final Clarifiers for Activated Sludge Plants
This paper summarizes the physical and biological factors affecting the settling of activated sludge. It provides guidelines for the design of radial flow clarifiers for activated sludge...

A Finite Element Family for Fracture Calculations

Analysis of the Variations in Municipal Flowrates and BOD5 and Suspended Solids Mass Loading Rates

Repair and Strengthening of Old Steel Truss Bridges
During the early 1900's, numerous pin jointed steel bridge trusses were constructed throughout the United States. In the intervening years, these trusses were replaced by...

Pinhole Test for Dispersive Soil—Suggested Change
In this test, a small hole is made in the specimen to be tested, and distilled water is allowed to flow through the hole. Dispersibility is assessed by observing effluent color and changes...

 

 

 

 

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