Inelastic Stability of Directionally and Rotationally Restrained Imperfect Steel Columns

A Survey of Methods to Measure Vorticity in Turbulent Flows

A Reynolds Stress Measurement Technique for Complex Flows

Plastic Rotation of Composite Beams
The sagging rotation capacity of composite beams consisting of a concrete slab attached to a steel beam by a shear connection is studied. Tests are reported on four full-scale beams in...

Generalized Stiffness Matrix for Thin Walled Beams
Stiffness matrix for a structural member is obtained using the differential equations derived by V.Z. Vlasov. Presence of additional off-diagonal elements over the conventional tridiagonal...

Rotating Biodisks Recarbonate Alkaline Wastewater
Lime addition to raw wastewater as an upgrading technique can significantly aid a rotating biological contactor (RBC) plant in producing effluents in compliance with federal discharge...

Simplified Bending Theory for Wire Rope
A theory has been developed to predict the static response of wire rope subjected to tension, torsion and bending. This type of loading occurs frequently in ropes wrapped around sheaves....

Nitrification Kinetics and Its RBC Application
The surface reaction model for the mechanism of mass transfer-metabolism in the fixed-film nitrification process is investigated and discussed for the design of trickling filter systems...

Rotating Biological Contactor System Design
Practical application of Wu's model for the prediction of soluble BOD removal in RBC systems is discussed extensively for various operating conditions. The model was tested...

Engineer-in-Training Program Alaska District, CoE
Rotational Engineer-In-Training Program is a success at the Alaska District, Corps of Engineers. Initiated in 1967, it is better than similar programs conducted by the State of Alaska,...

Surface Hydrology: IV°Flow in Sloping, Layered Soil
In a nonuniform soil with rotational symmetry the properties change along a coordinate n that forms an angle a with the vertical. During infiltration...

Natural Frequencies of Curved Girders
A general finite element displacement formulation is presented to determine the natural frequencies of spatial thin-walled curved girders including the warping contribution. Also included...

Weld Group Behavior
Methods for calculating the ultimate loads of fillet weld groups are explored, and results are compared with elastic limiting loads. The position of the instantaneous center of rotation...

Bond Characteristics of Initially Untensioned Strand
A general hypothesis is developed for the pullout response of initially untensioned but rotationally restrained, seven-wire prestressing strand from concrete. Pertinent experimental data...

Prediction of RBC Performance for Nitrification
The data reported previously by many investigators were used to develop mathematical models for the prediction of nitrification by a rotating biological contactor (RBC). The RBC served...

Extensions to Curved Prestressed Concrete Beams
The theorem of Guyon is modified for a continuous curved beam and those forces that invalidate the theorem are determined in terms of equivalent loads. For these loads, influence coefficients...

Vibration Identification in Rotating Equipment
The principal causes of vibrations in rotating machinery are discussed with particular attention given to the condition of resonance and how it affects a machine-foundation unit. Experimental...

Stress-Deformation Predictions using a General Phenomenological Model

Grid on Elastic Foundation with Rotational Restraints
Mathematical models of aquatic systems frequently represent phytoplankton growth dynamics in nutrient limited environments by saturation or Michaelis-Mention type kinetics. When nitrogen...

Steady-State Response of Thick Rectangular Plates
The classical theory of plates neglects the effects of rotatory inertia and shear deformation, and due to this assumption it is applicable only for thin plates. Mindlin presented an improved...

 

 

 

 

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