Abstract: The low-strain stiffness and energy dissipation in particulate materials is strongly determined by the behavior of contacts. This paper presents results of a test program designed to study the effect of contact response ...

Abstract: Material damping is a fundamental parameter required for dynamic analysis of geotechnical and civil infrastructure. The material damping ratio is very difficult to measure in situ. A new methodology for in situ measuring ...

Abstract: Utility wood poles are extensively used to support electrical-transmission and distribution lines in North America. Wood poles are exposed to extreme weather conditions, making them vulnerable to internal deterioration ...

Abstract: Ultrasonic testing is a nondestructive technique commonly used for in situ condition assessment of wood poles. A transmitter and a receiver are used in a transillumination configuration to measure the first arrival of ...

Abstract: Spectral analysis of surface waves measurements are used to develop subsurface soil profiles or as a tool to delineate abandoned crown pillar structures. Finite element modeling of Rayleigh waves has practical application ...

Abstract: This paper presents a novel methodology for the nondestructive evaluation of brick walls using fuzzy logic and summarizes the results of the nondestructive evaluation of the relative condition of a sidewall of a brick ...

Abstract: An experimental anaerobic biofilm fluidized bed reactor (ABFBR) unit was run with artificial substrate during 314 days. The experimental data were classified according to the value of the influent flow rate, and a set of ...

Abstract: In large infrastructures, the nonintrusive evaluation of structural fitness at the local scale can be time-consuming using the conventional P-wave-based ultrasonic tests. Adopting a multisensor approach to examine the ...

Abstract: The response of a bender transmitter to sinusoidal excitations in air, liquids, and transparent soil is investigated using a novel laser vibrometer technique. The purpose of the study is to investigate how benders vibrate ...

Abstract: The resonant-column test is widely used for dynamic characterization of soils under different confinement and shear-strain conditions. The free-decay response of a soil specimen in resonant-column testing shows a nonlinear ...