# 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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