Lumped Elastoplastic Flexibility Models
For the dynamic analysis of structures beyond the elastic range, one approach is to discretize the mass and the flexibility of the structure such that the model is kinematically determinate....

Elastoplastic Stress-Strain Theory for Cohesionless Soil
Based on the results of cubical triaxial tests on Monterey No.0 Sand, an elastoplastic stress-strain theory was developed for cohesionless soil. The theory incorporates a new failure criterion,...

Moment-Curvature for Elastoplastic Beams
To determine the deflected line of a beam, it is necessary to know the relationship between the bending moment and the curvature. It the cross section is defined, the desire relationship...

Deformation Spectra for Elastic and Elastoplastic Systems Subjected to Ground Shock and Earthquake Motions

Computer Mapped Hologram Images in Stress Analysis
A new method of data display is presented. The central feature of the method is the production of contour maps in the form of theoretically computed virtual images of a doubly exposed...

Random Vibration of Yielding Oscillator
An approximate analytical method is developed for predicting the stationary rms levels of response of a yielding oscillator subjected to white noise random excitation. The method is based...

Stability of Braced and Unbraced Frames
In the paper the results of an analytical study of the behavior of braced and unbraced frames and subassemblages is presented. The analysis assumes elastic perfectly plastic member response...

General Failure Analysis of Skeletal Plane Frames
A finite beam column element computer program for the structural analysis of proportionally loaded plane frames is described. The load-deflection curve is followed up to frame collapse...

Nonlinear Layered Analysis of RC Plates and Shells
A layered nonlinear finite element analysis including the elastoplastic behavior of steel, bilinear elastoplastic behavior of concrete, and limiting tension of concrete is presented. The...

Elasto-Plastic Analysis of Coupled Shear Walls
An elasto-plastic procedure for analysis of coupled shear walls by assuming a partial or complete collapse mechanism is presented. The complete collapse mechanism is assumed to occur when...

Finite Element Analysis of Reinforced Concrete
Cracking, crushing, and yielding of reinforced concrete beams is investigated by the finite element technique. Three-dimensional, 20-node isoparametric elements are used. The analysis...

Transient Random Response of Bilinear Oscillators
Results of an empirical study of the transient mean-square response of bilinear hysteretic oscillators to random excitation are presented. The oscillators considered include a moderately...

Influence of Constitutive Models on Ground Motion Predictions
In recent years, the development of mathematical models for the study of ground shock effects in soil, or rock media, or both, has made important progress. Three basic types of advanced...

Shakedown of Strain-Hardening Structures
Elastic perfectly plastic theory predicts progressive permanent deformations of statically indeterminate structure with each cycle of variable repeated loading above the so-called shakedown...

Elastic-Plastic Analysis of Cylindrical Shells
The behavior of cylindrical shells under a progressively increasing load is studied. For this purpose a mathematical model is used to replace the continuum. The model consists of rigid...

Finite Element Method for Elastic Plastic Plates
A finite element method is developed for the analysis of elastic, perfectly plastic sandwich plates. The method is formulated by means of Greenberg's complementary energy...

Rectangular Grillages of Least Weight
Using the Prager-Shield theory of optimal design, it is shown that the minimum weight of both perfectly plastic grillages and elastic grillages of given strength as well as elastic grillages...

Elastic-Plastic Analysis by Quadratic Programming
The plastic principles of absolute minimum of the rate of total potential energy and total complementary potential are used as tools for fomulating the elastic-plastic analysis of various...

Elastic Plastic Bending of Circular Plates
An approximate analysis is presented for the elastic-plastic bending of a moderately thick plate at large deflection. The analysis is carried out on a simplified model representing the...

Response of Ground-Excited Elastoplastic Systems
The response of elastoplastic systems of the shear-beam type with up to five degrees-of-freedom is investigated for both pulse-type excitations of the base and for earthquake ground motions....

 

 

 

 

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