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Mixed Lagrangian Formalism for Temperature-Dependent Dynamic Thermoplasticity
Publisher: American Society of Civil Engineers
Abstract: A variational temperature-dependent formulation is proposed and developed for dynamical problems of thermoplasticity. The variational method is based on a Hamiltonian approach using a weak form of the mixed thermoplastic ...
Mixed Lagrangian Formulation for Linear Thermoelastic Response of Structures
Publisher: American Society of Civil Engineers
Abstract: Although a complete unified theory for elasticity, plasticity, and damage does not yet exist, an approach on the basis of thermomechanical principles may be able to serve as the foundation for such a theory. With this in ...
Computational Framework for Automated Seismic Design of Steel Frames with Self-Centering Connections
Publisher: American Society of Civil Engineers
Abstract: A computational framework is proposed as an automated design cycle for the optimal seismic design of steel frames with self-centering connections. This paper demonstrates the approach by considering steel frames retrofitted ...
Dynamic Analysis of Axisymmetric Foundations on Poroelastic Media
Publisher: American Society of Civil Engineers
Abstract: A boundary element method (BEM) is presented for the dynamic analysis of axisymmetric poroelastic media, subjected to time-harmonic excitation. The integral formulation, based on the fundamental solution of Biot's poroelastic ...
Concentrically Loaded Circular Steel Plates Bearing on Plain Concrete
Publisher: American Society of Civil Engineers
Abstract: This paper presents an analytical study to determine the effects of bearing stress distributions on concrete bearing strength and bearing plate flexural demand, for concrete blocks loaded concentrically through nonanchored ...
Optimal Design of Bundled Layered Elastic Stress Wave Attenuators
Publisher: American Society of Civil Engineers
Abstract: This paper describes the development of new material architectures for mitigating the effects of impulsive loadings using layered structures. The underlying concept explored in this research relies on stress wave attenuation ...
Dynamic Ratcheting in Elastoplastic Single-Degree-of-Freedom Systems
Publisher: American Society of Civil Engineers
Abstract: In dynamic analysis, hysteretic damping often provides a reasonable model of the inelastic behavior of a structure. Nonlinearity presented by hysteretic damping, however, introduces the possibility of developing complicated ...
Size Effects in Vibrating Silicon Crystal Microbeams
Publisher: American Society of Civil Engineers
Abstract: The vibrations of ultrathin silicon cantilever microbeams are studied using consistent couple-stress theory to investigate size-dependent effects. The corresponding Euler-Bernoulli beam theory is used to estimate the ...
Air-Blast Effects on Structural Shapes of Finite Width
Publisher: American Society of Civil Engineers
Abstract: In blast engineering, many designs begin with simplified hand procedures with the loading parameters determined based upon a reflective surface of infinite size. Individual structural members such as columns have finite ...