Natural Vibrations of Cylindrical Panels
In terms of Lamé parameters, basic equations and energy expressions are formulated for the moderately thick-walled shells. The general formulations are then specialized for cylindrical...

On the Accuracy of Timoshenko's Beam Theory
The deflection and rotation which appear in Timoshenko's beam theory may be defined either (a) in terms of the deflection and rotation of the centroidal element of a cross-section...

Dynamic Characteristics of Multistory Buildings
In order to evaluate unit stresses or to estimate possible damage in multistory buildings from earthquake or ground motion from underground nuclear explosion it is essential to determine...

Curved Beam Stiffness Coefficients
A three-dimensional stiffness coefficient matrix for constant cross section curved beams is derived. This matrix relates the beam end point rotations and translations to the internal moments,...

Transverse Flow in a River Due to Earth's Rotation
Transverse circulation due to the earth's rotation in straight uniform channels with turbulent flow was investigated and evaluated. No previous direct measurements are known....

Comparison of Footing Vibration Tests with Theory
Theoretical solutions treating footings resting on an elastic semi-infinite body were compared with test results recently published by WES. The test footings were from 5 ft to 16 ft in...

Physical Bending Strains in Linear Shell Theory
Expressions for the physical bending strains of linear shell theory in non-orthogonal coordinates are presented which are new in form, are completely analogous to the tangential strains...

Higher-Order Finite Element for Plane Stress
A higher-order plane stress stiffness matrix is developed to overcome some of the deficiencies at the standard constant stress triangle. The stiffness matrix is derived from polynomial...

Analysis of Restrained Columns Permitted to Sway
A numerical method for analyzing restrained steel columns subjected to combined axial force, end moments, and horizontal shear is presented. The columns are rotationally restrained at...

Inelastic Beams under Moment Gradient
The paper examines the behavior of wide flange beams loaded into the inelastic range under moment gradient conditions. It is shown that loads in excess of the plastic moment can be expected...

Elasto-Plastic Response of Timoshenko Beams
A method for computing the elasto-plastic dynamic response of Timoshenko beams (i.e., effects of shear deformation and rotatory inertia included) is presented. The method uses a lumped...

Multibeam Bridges with Elements of Channel Section
A general method is presented by which multibeam bridges of channel section can be analyzed. The method is based on the assumption that the shear key, which connects individual beam elements,...

Comparison of Space Resection Adjustment
The least squares solution of the photogrammetric space resection problem is obtained by four methods. These are the minimization of the sum of the squares of the angle cosine residuals,...

Manifolds, Rotating and Stationary
Pipe manifolds with unsteady flow are frequent occurrences in civil engineering design. Rotating manifolds are used on trickling filters with rotary distributors, and stationary manifolds...

General Theory for Thick Shell Analysis
Applications of shell structures to many engineering fields have introduced the problem of analyzing thick elastic shells. A useful tool for describing shells is tensor analysis. By using...

Interaction of Edge Beams with Doubly Curved Shells
A method originally developed by Jenkins for considering the interaction of cylindrical shells with straight edge beams is extended to the case of doubly curved translational or rotational...

Rotational Capacity of Reinforced Concrete Beams
All limit design theories are based on the principals of equilibrium of forces and compatibility of deformations at the state of impending collapse. Use of these theories is dependent...

Hydraulic Performance Comparison of Centrifugal Pumps
The purchase of large water pumps, requiring a high capital investment, necessitates, in addition to the economical evaluation, a thorough analysis of the hydraulic performance of the...

Water-Hammer Charts for Centrifugal Pump Systems
Water-hammer analysis of centrifugal pumping systems following power stoppage can be greatly simplified and expedited with the use of generalized charts. Charts are presented for determining...

A Method to Increase the Accuracy of Moire Method
The accuracy of Moiré method depends on the number of fringes that define the displacement field of the model. Fringe density can be increased without using fine grids by introducing linear...

 

 

 

 

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