Grid-Framework Method for Plates
A grid-framework procedure is presented for the analysis of plates in flexure. A square or rectangular grid model with side and diagonal members is used to represent a similar element...

Stress in Hyperboloids under Edge Loadings
A solution of the bending of thin shells of revolution with negative Gaussian curvature is presented. This solution is derived from the general theory presented by E. Reissner and later...

Slow Viscous Flow of an Incompressible Suspension
A mathematical model describes approximately the viscous creeping and incompressible flow of the fluid part of a suspension of equidistant, rigid, spherical particles, when the suspension...

Slenderness Effects in Buildings
Methods for analyzing slenderness effects in tier buildings are proposed. Some of these methods apply to buildings with braced frames, as well as to those with unbraced (space) frames....

Analysis of Deflections in Elastic-Plastic Frames
A method is proposed to compute deflections throughout an elastic-plastic plane frame. It is related to the Williot-Mohr analysis for trusses. After the force analysis, all frame joints...

Inelastic Steel Beams Under Uniform Moment
The out-of-plane behavior of closely braced steel wide-flange beams is examined. Unloading (failure) of such beams terminates their rotation capacity and thus their usefulness in plastic...

Complementary Energy Method for Finite Deformation
A principle of stationary complementary energy is developed for statically loaded structures with finite displacements, rotations, and strains, made of material with linear or nonlinear...

Dynamic Response Functions
Visco-elastic, shear, and rotatory inertia effects are introduced into the Laplace transforms of the response functions for lattice structures. The response functions are written in a...

Optical Tooling for Precise Structural Measurements
An experimental application of optical tooling to a structural engineering problem was made in the Truss Bridge Research Project at Northwestern University. The methods and equipment used...

Experimentation Rotation Capacity of Steel Beams-Columns
The results of 31 tests on small scale mild-steel I-section stanchions are presented. The specimens were loaded by a constant axial load and bending moment acting at one end in the plane...

Interpretation of Moire Patterns
A description of several of the basic properties of moiré patterns used in strain analysis is presented. The uniqueness and continuity of displacements are noted, compared with topological...

Buckling of Stepped Columns with Rotated Ends
Presented is an approximate solution to the problem of determining critical buckling loads for long columns with abrupt changes in inertia properties at the ends. The ends of the column...

Stresses in a Pressurized Box
Considering each of the six sides of a closed, pressurized box as a thin plate subjected to an unknown distribution of edge moments, the latter may be found by assuming that the rotations...

Analysis of Arch Frames
The analysis of arch frames is presented by means of an extension of the moment-distribution method which automatically accounts for sidesway. In the fixed-end stage, the frame undergoes...

Calibration of A325 Bolts
Direct tension and torqued tension tests of 170 A325 bolts were carried out to determine the behavior and performance of individual A325 bolts. The major variables studied in the program...

Velocity Concentrations in Stratified Fluids
Examples of velocity concentrations or jets in fluid systems; systems are discussed in which vorticity is present or is generated by density variations; typical jet streams of atmosphere...

Optical Current Meter
Stroboscopic device developed to measure surface velocities of water in open channels without immersing equipment in stream; meter is light-weight battery-powered unit consisting of low-power...

Experimental Determination of Sludge-Flow Parameters
Use of rotational and capillary viscometer for experimental determination of non-Newtonian flow parameters of sewage sludges is considered; description of equipment and calibrating procedures...

Structural Model Analysis by Means of Moire Fringes
Use of moire fringes in measurement of displacements and rotations in structural models; method, applied to case of simply supported beam, continuous beam, and 2 plane frames, gave results...

Analysis of Frames Loaded into the Plastic Range
Presented precise method of analysis involves determination of compatible moment of rotation of joint by intersection of 2 moment vs end rotation curves of adjoining members; effects of...

 

 

 

 

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