# 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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