... A laminar box has been constructed at Rensselaer Polytechnic Institute to permit accurate dynamic centrifuge testing of geotechnical and soil-structure models subjected to horizontal one-dimensional earthquake excitation at the base of a soil deposit. The container is designed for dry...

... This paper presents the results of a study performed to predict the effect of the dynamic component of wind pressure on an inflated single-ply roofing membrane and its attachment mechanism. The calculation is performed based on the measured power spectra of wind pressure at points on the roof...

... with the falling weight deflectometer (FWD) over the wave propagation method, the Air Force has adopted the FWD as its primary evaluation method. nondestructive testing pavement wave propagation dynamics evaluation analysis testing modulus of elasticity computer analysis M. C. Wang, 1 William...

..., and response under dynamic loading. It is concluded that there is no indication that physical characteristics of the shelf deposits or pelagic deposits (excluding calcareous and siliceous materials) are fundamentally different and unique compared to terrestrial soils. In addition, apparent overconsolidation...

... of sensors, and measurement of the instant of energy generation. clays crosshole tests dynamics explosives geophysics limestone mechanical sands seismic velocities seismic waves soils V. R. McLamore,' D. G. Anderson,' and C. Espana^ Crosshole Testing Using Explosive and IVIeciianical...

... Dynamic shear moduli determined at low shearing strain amplitudes (<10 -3 percent) during sustained-pressure, resonant-column tests are shown to increase with time of confinement. The time-dependent modulus increase is characterized by two phases: (1) an initial phase which results from...

... Engineers concerned with the development of Alaska and other highly seismic areas underlain by permafrost must have knowledge of dynamic properties of frozen soils under earthquake loading conditions. In response to this need, a cyclic triaxial test system and test methods have been developed...

... The author briefly reviews the factors important to the blowcount ( N ) values obtained from the standard penetration test (SPT), and describes the dynamics of the SPT in terms of wave transmission theory and measurements. The SPT appears to correlate well qualitatively with sand liquefaction...

... downhole method dynamics field tests geophysical prospecting seismic investigations seismic waves shear modulus shear wave velocity torsional source triggering soils R. J. Hoar' and K. H. Stokoe IP Generation and Measurement of Shear Waves In Situ REFERENCE: Hoar, R. J. and Stokoe, K. H., II...

... for slowly moving ones. crack propagation dynamics fracture properties plastic properties K. B. Broberg' On Effects of Plastic Flow at Fast Crack Growth REFERENCE: Broberg, K. B., "On Effects of Plastic Flow at Fast Crack Growth," Fast Fracture and Crack Arrest, ASTM STP 627, G. T. Hahn and M. F...

... to be expressible as the static strain energy release rate, times a dynamic screening function, which depends on the instantaneous crack-tip velocity only. By using numerically calculated values for the strain energy release rate, an analytic expression for the dynamic screening function, and experimentally found...

... direct crack velocity measurement procedure was used, and it was found that the dynamic potential drop across the faces of the propagating crack obeyed an equation of the form V dynamic = A·v·c , where v is the crack velocity, c the crack length, and A an empirical constant. Crack velocity...

... This paper provides a guide to instrumentation planning for soil dynamics measurements. The total instrumentation system is outlined, and each of the basic parts including transducers, conditioning and recording instruments, and calibration systems is discussed. The objective is to provide soils...