Browsing Journal of Engineering Mechanics by Issue Date
Now showing items 1-20 of 6856
-
Time-Domain Response of Damped Stochastic Multiple-Degree-of-Freedom Systems
(ASCE, 1/1/2020 1)Characterizing the time-domain response of a random multiple-degree-of-freedom dynamical system is challenging and often requires Monte Carlo simulation (MCS). Differential equations must therefore be solved for each sample, ... -
Structural Reliability Analysis with Conditional Importance Sampling Method Based on the Law of Total Expectation and Variance in Subintervals
(ASCE, 1/1/2020 1)In this paper, a new approach is proposed to estimate the probability of failure in structural reliability analysis. This method is based on the law of total expectation and variance in subintervals, and it combines the ... -
Physical and Geometrical Nonlinear Dynamic Analysis of Beams on Foundations under Moving Loads
(ASCE, 1/1/2020 1)This paper is dedicated to the nonlinear finite-element analysis of the dynamic behavior of beams on foundations under moving loads. The goal of the study is to generalize, for more realistic foundation behaviors, the ... -
Experimental Study on Front Spreading of Lock-Exchange Gravity Current with Long Lock Length
(ASCE, 1/1/2020 1)Full-depth lock-exchange experiments of saltwater with a lock length x0 of 40 m were conducted in a horizontal open channel in order to gain insight into the gravity currents of long lock releases. Without the effects ... -
Modeling of Magnetorheological Self-Centering Brace
(ASCE, 1/1/2020 1)The self-centering brace (SCB) is a high-capacity structural component for lateral force resistance and recentering. This paper focuses on modeling the magnetorheological self-centering brace (MR–SCB). Full-scale cyclic ... -
Gust Buffeting and Aerodynamic Admittance of Structures with Arbitrary Mode Shapes. I: Enhanced Equivalent Spectrum Technique
(ASCE, 1/1/2021)The loading and response of structures due to gust buffeting is a dominant topic of wind engineering. One of its crucial aspects is the shape of vibration modes. Although numeric solutions are available for any mode, ... -
Reconstructing Element-by-Element Dissipated Hysteretic Energy in Instrumented Buildings: Application to the Van Nuys Hotel Testbed
(ASCE, 1/1/2021)The authors propose a seismic monitoring framework for instrumented buildings that employs dissipated energy as a feature for damage detection and localization. The proposed framework employs a nonlinear model-based state ... -
Gust Buffeting and Aerodynamic Admittance of Structures with Arbitrary Mode Shapes. II: A POD-Based Interpretation
(ASCE, 1/1/2021)Studies carried out on gust buffeting and aerodynamic admittance show that mode shape represents a sort of watershed. If the mode does not change sign along the structure axis, the problem admits a robust conceptual ... -
Seismic Performance of a Single-Story Articulated Steel Structure System
(ASCE, 10/1/2020 )An innovative articulated steel frame system consisting of continuous beams, columns, and end plates with gap bolts is proposed in this study. The gap bolts are untightened with initial gaps and used to connect beam flanges ... -
Fracture and Size Effect Suppression by Mesh Reinforcement of Concrete and Justification of Empirical Shrinkage and Temperature Reinforcement in Design Codes
(ASCE, 10/1/2020 )A minimum mesh reinforcement, called the shrinkage and temperature reinforcement, has been required by ACI design code for 92 years to attain ductility with no formation of large localized cracks. The required steel ratio, ... -
Induced Vibration of a Surface Foundation atop a Fluid-Conveying Embedded Pipe
(ASCE, 10/1/2020 )The dynamical behavior of a system containing a surface foundation atop a fluid-conveying pipe that is embedded in soil beneath the foundation is investigated. A Winkler–Voigt model is presented to simulate the interaction ... -
Stability Analysis of Real-Time Hybrid Simulation with Time-Varying Delay through a Delay Decomposition Approach
(ASCE, 10/1/2020 )Stability of real-time hybrid simulation (RTHS) has attracted considerable attention given that actuator delay might destabilize the real-time test, especially when the compensation is not sufficient. Previous research by ... -
Size Effect on Shear Strength of Reinforced Concrete: Is CSCT or MCFT a Viable Alternative to Energy-Based Design Code?
(ASCE, 10/1/2020 )After sketching the history of the size effect models for the shear strength of reinforced concrete (RC) in design codes, the energy-based size effect law (SEL), recently incorporated into the American Concrete Institute ... -
Modeling, Characterizing, and Testing a Simple, Smooth Negative-Stiffness Device to Achieve Apparent Weakening
(ASCE, 10/1/2020 )Apparent weakening is the softening of a structure’s apparent stiffness by adding negative stiffness to the overall system, which has the benefit of reducing the peak accelerations and base shears induced in the structure ... -
Experimental and Numerical Study on Dynamic Behavior of Eddy Current Damping with Frequency Dependence
(ASCE, 10/1/2020 )This study investigates the dynamic and nonlinear behavior of an eddy current (EC) damping mechanism by using shaking table tests and finite-element modeling. A noncontact and friction-free EC damper is firstly designed ... -
Multiple Crack Propagation and Coalescence in Finite Elements with Minimal Local Remeshing Using the Subregion Generalized Variational Principle
(ASCE, 10/1/2020 )Multiple crack propagation and coalescence in two-dimensional linear elastic media were modeled using the finite-element method (FEM) in conjunction with the subregion generalized variational principle. The proposed approach ... -
A Multifield Model for Early-Age Massive Concrete Structures: Hydration, Damage, and Creep
(ASCE, 10/1/2020 )A multifield model of the early-age behavior of massive concrete structures is presented. The hydration process and the thermal evolution are both described through a coupled chemo-thermal model that predicts the degree ... -
Cluster Analysis of Near-Fault Ground Motions Based on the Intensity of Velocity Pulses
(ASCE, 10/1/2020 )In this paper, it is aimed to perform clustering analysis on a large set of near-fault ground motions based on the intensity of velocity pulses. For this purpose, the velocity pulses of these ground motions are extracted ... -
Numerical Modeling of Delayed Progressive Collapse of Reinforced Concrete Structures
(ASCE, 10/1/2020 )There has been ever-increasing interest over the past decade in improving understanding of the mechanisms responsible for the progressive collapse of structures. Existing design recommendations and analyses are largely ... -
CFD-Based Framework for Analysis of Soil–Pipeline Interaction in Reconsolidating Liquefied Sand
(ASCE, 10/1/2020 )Submarine buried pipelines interact with shallow soil layers that are often loose and prone to fluidization/liquefaction. Such occurrence is a possible consequence of pore pressure build-up induced by hydrodynamic loading, ...