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Floor Spectra for Nonclassically Damped Structures
Publisher: American Society of Civil Engineers
Abstract: An approach is presented for the generation of seismic floor response spectra for structures which cannot be modeled as classically damped. Although the nonclassically damped structures do not possess classical modes, the ...
Modeling of Facet Articulation as a Nonlinear Moving Contact Problem: Sensitivity Study on Lumbar Facet Response
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A finite element (FE) based scheme for modeling facet articulation in a spinal motion segment is proposed. The algorithm presented models the facet articulation as a nonlinear progressive contact ...
Seismic Floor Spectra by Mode Acceleration Approach
Publisher: American Society of Civil Engineers
Abstract: The truncation of the high frequency modes, so commonly used in dynamic structural analysis, sometimes can cause significant errors in the calculated response; this is caused by the so‐called missing mass effect. Such mode ...
Source‐Receptor Modeling of PAHs Using Deposition Levels in Winter‐Long Urban Snowpack
Publisher: American Society of Civil Engineers
Abstract: Undisturbed urban snowpack effectively collects various airborne pollutants (including PAHs), which are deposited within the snowpack through the process of wet and dry deposition. The deposition‐capture and long‐term‐retention ...
Maximum Likelihood Method for Parameter Estimation in Linear Model with below-Detection Data
Publisher: American Society of Civil Engineers
Abstract: The maximum likelihood (ML) method for regression analyses of left-censored data is improved for general acceptance by considering the censored observations to be doubly censored. The existence of a lower bound (i.e., the ...
Alternative Method for Nonrevenue Water Component Assessment
Publisher: American Society of Civil Engineers
Abstract: This paper presents a practical method for estimating the volume of apparent losses in water supply systems, particularly in a developing country context, so that real losses can be calculated from the volume of nonrevenue ...
A Comparative Study of Single-Phase, Two-Phase, and Supercritical Natural Circulation in a Rectangular Loop
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A one-dimensional theoretical model has been used to analyze the steady state and stability performance of a single-phase, two-phase, and supercritical natural circulation in a uniform diameter ...