Summary Report on Experimental Evaluation of Simulated Uncased Pipeline Crossings of Railroads and Highways

Kelvin's Solution of Torsion Problem
Kelvin and Tait have shown that plate-like bars of thin rectangular cross section resist an applied torque by shearing stresses in two distinct ways. One-half of the torque is carried...

Effects of Initial Curvature on Column Strength
Herein the two types of initial curvature: initial curvature on maximum strength of columns of rectangular cross section, and initial curvature on the maximum strength of a column, are...

Unconfined Aquifer Seepage by Capillary Flow Theory
A numerical scheme is presented to analyze a two-dimensional unconfined aquifer of rectangular cross-section to determine the fall of the water table, the water content and the rate of...

Distribution of Tractive Force in Open Channels
The designs of alluvial channels by the tractive force method requires information on the distribution of wall shear stress over the wetted perimeter of the cross-section. The present...

Unsteady Flow in Channel of Variable Cross Section
Characteristic equations describing one-dimensional unsteady open-channel flow in an irregular channel are developed. The integration of these characteristic equations is presented and...

Geometric and Frictional Effects on Sudden Releases
The effects of resistance and channel cross-sectional geometry on the waves of sudden release are investigated. The analytical treatment follows Dressler's approach with the modification...

Matrix Force Analysis of Thin-Walled Structures
The Bernoulli's hypothesis of plane cross sections remaining perpendicular to the deformed center line does not adequately approximate the deformation due to the torsion of a long prismatic...

Torsion Analysis of Heavy Box Beams in Structures
Heavier box sections with thicker walls without the need of longitudinal stiffeners are widely used to resist combined torsion and bending loads in machines such as earth-moving and mining...

Compression Tests on Hoop-Reinforced Concrete
Forty-eight concrete prisms of square section were studied under monotonically increased axial compression up to maximum load. The two variables in the study concerned the provision of...

Parametric Matrices of Some Structural Members
The developments are described of local flexibility and stiffness matrices of straight-tapered members, circular members of constant cross section, and prismatic beams on Winkler-Type...

Tapered Box Girders of Deformable Cross Section
A general theory of torsion of tapered box girders of deformable cross section, its experimental substantiation, studies of the ultimate strength of box girders, and the use of the theory...

Heated Discharge from Flume into Tank
Information obtained in laboratory experiments is given on the physical processes producing temperature and velocity distributions when heated water is discharged from a channel into a...

Research Programs on Pipeline Crossings
A history and summary report concerning the activities of the American Society of Civil Engineers (ASCE) Research Council on Pipeline Crossings of Railroads and Highways is given. This...

Analytical Plotter System
The analytical plotter, model AP/C, is a highly precise photogrammetric instrument used as an investigating or engineering tool, or both. Civil engineers utilized the instrument in the...

One-Dimensional Equations of Open-Channel Flow
One-dimensional equations of continuity, momentum, and energy for unsteady, spatially varied flow in a fixed-bed open channel of arbitrary configuration are derived from the point forms...

Hydraulic Properties of Small Unlined Rock Tunnels
The factors influencing the hydraulic characteristics of small unlined tunnel cross-sections are presented. Investigations were carried out in rock tunnels constructed by the Helsinki...

On the Concept of Mean Hydraulic Radius
By using the hydrodynamic analogy between the torsion of a uniform bar with arbitrary cross-section and viscous flow through a channel of the same shape, the flow rate through any channel...

Longitudinal Dispersion in Open Channels
The effects of cross-sectional geometry and velocity distribution on the dispersion process in straight, uniform open channels with large width-to-depth ratio are investigated. The method...

Sediment Measurement Techniques: A. Fluvial Sediment
A description is given of modern techniques and equipment used to plan and make sedimentation measurements on natural streams. First typical examples are given of sedimentation characteristics...

 

 

 

 

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