Abstract: Impact-echo tests were performed on a precast, reinforced concrete bridge slab that was removed from a maintenance bridge built in 1953 in South Carolina. Impact-echo tests were first performed to nondestructively assess ...

Abstract: It has been recognized that liquefaction resistance of sand increases with age due to processes such as cementation at particle contacts and increasing frictional resistance resulting from particle rearrangement and ...

Abstract: A test section was constructed at the National Geotechnical Experimentation Site at Northwestern University to assess the applicability of nondestructive testing methods to evaluate deep foundations under inaccessible-head ...

Abstract: A new method to nondestructively evaluate existing deep foundations is described for the situation where access to the top of a deep foundation is prevented by an intervening structure. The test consists of striking a ...

Abstract: The impulse response test is a nondestructive evaluation technique commonly used for quality control of driven concrete piles and drilled shafts where the pile heads are accessible. When evaluating existing foundations, ...

Abstract: Numerical and experimental studies were performed to assess the transient impact response of 11 T-beams with various dimensions and aspect ratios. Numerical modeling was performed using a three stage finite-element modeling ...

Abstract: Three Pleistocene-age sand deposits from 100,000 to 1.2 million years old in the South Carolina Coastal Plain were characterized with the cone penetrometer test and samples were tested in a cyclic triaxial system to ...

Abstract: Laboratory and field tests were performed on sandy soils from six Pleistocene-age sites in the South Carolina coastal region to investigate the age-related resistance to liquefaction. Stress-controlled cyclic triaxial tests ...

Abstract: The frequency response method is used to determine the location and rate of leakage in open loop piping systems. A steady-oscillatory flow, produced by the periodic opening and closing of a valve, is analyzed in the frequency ...