Beams, Frames and Shells on Elastic Foundations
Explicit stiffness matrix, present matrix and nodal forces are used as a basis for computer analysis of beams, rings, simple frames, and branched shells of revolution on a three-parameter...

Politicians Are Not Technologists: Technologists Are Not Politicians
The view that there are too few engineers in the legislative branch of government is confirmed. It is argued that the lack of scientists and engineers in elected public offices creates...

Optimum Depth and Spacing of Subsurface Drains
Optimization theory is used to minimize the cost of installation of subsurface drainage systems. The optimization problem is presented and constraints are identified. The analytic solution...

Contractor Quality Control: An Evaluation
CQC (Contractor Quality Control) is a system mandated by certain government agencies to place the entire responsibility for quality control on a project upon the contractor. The contractor...

Current Municipal Sludge Utilization and Disposal
Current sludge disposal practices are defined by a recently completed survey of 1,008 randomly selected municipal wastewater treatment facilities stratified by each of the 50 states. The...

The Resident Engineer: Intermediary Between Owner and Contractor
The resident engineer must possess significant talents other than the necessary technical abilities that qualify him for his position. The tactful and diplomatic handling of project interrelationships...

Equivalent Roughness of Alluvial Bed
The eguivalent roughness of a movable bed is considered. Relationships are given which can be used to determine the equivalent bed roughness from the bed material size and the bed-form...

Buckling of Corrugated Open Cylindrical Shells
The purpose of this study is to determine the critical buckling stress of open cylindrical shells with sinusoidal corrugations with free longitudinal edges subjected to uniform compression...

Bed Material Sorting in Pools and Riffles
When rivers flow in a series of riffles and pools during periods of low flow, bed material sizes change from coarser to finer in the riffle-pool sequence. The Froude Number also changes...

Laterally Loaded Piles in a Two-Layer Soil System
Typical results for pile head displacement and maximum moment in nondimensional terms, for a laterally loaded free-head pile embedded in a two-layer soil system, using elastic approach,...

Sampling with Decomposed Variance
In many problems of statistical sampling in civil engineering a prior distribution reflecting some global population is available and a small sample of observations is made on a particular...

Nitrification Rates in Activated Sludge
By using biokinetic and stoichiometric equations it was possible to theoretically develop insight into factors that affect nitrification rate in activated sludge systems. From this study...

Stability of Slopes by Method of Characteristics
The method of characteristics with some simplifying assumptions is made applicable for analyzing a given straight slope. By assuming that the mobilized shear strength varies with depth,...

Simplified Testing of Hydrologic Regression Regions
The Wilsoxon Signed Ranks Test is suggested to test the statistical significance of homogenous hydrologic regions defined by subjectively drawing regional boundaries around regression...

Separation Angle Effect on Vortex Shedding Frequency
Vortex shedding frequencies were measured for a number of two-dimensional bluff bodies whose boundary layers separation angles ranged from 0°-90° to the oncoming flow. Strouhal numbers...

Computer Analysis of Settling Test Data
A method of fitting a simple approximating function to quiescent settling test data is given that can serve for either discrete or flocculant settling. The method can be used with the...

Creep of Pipes Under Axial Force and Twisting Moment
The load-deformational behavior of twisting of pipes in the presence of axial force is examined. Based on the small deformation theory, charts and curves, which relate the twisting moment,...

Mapping Landslide Hazards in Forest Watersheds
A physically realistic methodology is presented for estimating and mapping landslide hazards for watersheds. This methodology also considers the variability of the controlling factors....

Creep of Pipes Under Axial Force and Bending Moment
The load-deformational behaviour of a thin-walled circular cylinder in the presence of axial force is studied. Based on the small deformation theory, an exact analysis is presented for...

Nature of Wave Attenuation in Open Channel Flow
The identification of the term or group of terms which will cause a free-surface flow to dissipate is investigated. It is shown that wave attenuation is caused by the interaction of the...

 

 

 

 

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