Field Monitoring of a Modular Detached Breakwater System
A pair of modular concrete detached breakwaters was installed at a site on the New Jersey shore. This paper describes an eighteen month field monitoring program of the beach response to...
Laupahoehoe Harbor Planning, Design, & Construction
Laupahoehoe Harbor provides access to the fertile fishing grounds along the northeast or Hamakua coast of the island of Hawaii, Hawaii. The planning, design, and construction of Laupahoehoe...
Sylvan Beach Pier Rehabilitation Study
The Sylvan Beach Pier is a navigation guide jetty located at the east and of Oneida Lake in Oneida County, New York. It protects the entrance to the New York State Barge Canal which crosses...
Application of a Dolos Structural Design Procedure
Dolos concrete armor units are widely used to protect coastal structures. New developments in armor unit strength design permit the armor unit designer to optimize the dolos parameters...
Peaches and Concrete
One Peachtree Center, Atlanta's latest highrise tower, will measure 62 stories high (860 ft) with 1.42 million sq ft of office space when completed next July. It will also...
L'Ambiance Plaza: What Have We Learned
In April 1987, a structure called L'Ambiance Plaza collapsed during construction, killing 28 workers. The building, in Bridgeport, Conn., was being built using the lift-slab...
A feasibility study for a Concrete Core Tomographer
This is a study of the feasibility of applying computer tomography in the study of concrete cores. A laboratory protocol is presented for testing concrete cores using a medical - grade...
Real-Time Condition Monitoring of Concrete Structures by Embedded Optical Fibers
Fiber optic sensor methodology has matured to the point where the impact of this new technology is now evident, especially in aeronautics and space structure applications. External perturbations...
Concrete Beam Testing with Optical Fiber Sensors
The use of an embedded multimode optical fiber to monitor curing and load-to-failure testing of a reinforced concrete beam has been investigated. The embedding process used to network...
Sonic NDE of Structural Concrete
Case histories are presented to illustrate applications of nondestructive evaluation (NDE) methods that use stress waves to characterize the conditions of concrete construction. The case...
Evaluation of Concrete Bridges by Impact-Echo
Strength of post-tensioned bridge structural members primarily depends on the tensile capacity of their post-tensioning steel reinforcement. To prevent corrosion, the post-tensioning steel...
A Critique of the Ultrasonic Pulse Velocity Method for Testing Concrete
The pulse velocity method is the most widely used ultrasonic nondestructive method for assessing concrete quality. However, it has been well established that the relation between ultrasonic...
Evaluation of Compressive Strength for High-Strength Concrete by Pulse Velocity Method
Development of compressive strength and pulse velocity for high-strength concrete from the age of 5 hours are studied in relation to cementitious material types and curing conditions....
Condition Monitoring of Structures Using Transient Response
Condition monitoring of structures by measuring transient response and tracking the derived modal parameters has been applied with success in three laboratory studies. Where modal parameters...
Numerical Simulation of Dynamic Shear Transfer
This study was focused on the dynamic response of concrete interfaces under the effects of impulsive loads, and the relationship between the interface shear transfer and the response in...
Nondestructive and Destructive Testing of a Three Span Skewed R. C. Slab Bridge
A three span, skewed, reinforced concrete slab bridge was field tested to destruction by the authors. Before the actual destructive test, nondestructive tests were performed to determine...
Simulated Field Trials of Non-Destructive Concrete Test Methods for Highway Structures
The data presented results from a two year Strategic Highway Research Program investigation into suitable NDT methods for determining the early age, and residual strengths of highway structures....
Nondestructive Crack Identification by Acoustic Emission Analysis and Ultrasonic Frequency Response
Nondestructive evaluation (NDE) by the acoustic emission (AE) analysis and the ultrasonic testing (UT) on the spectral (frequency) response is studied to identify crack geometry. AE waveform...
Review of NPP Concrete Degradation Factors and Assessment Methods
Degradation of concrete in nuclear power plant (NPP) structures can be an age-related phenomena. Several research programs have been initiated by the U.S. Nuclear Regulatory Commission...
Pullout Testing of High-Strength Concrete Members
An experimental investigation of a high-strength concrete mixture was undertaken to measure and evaluate pullout and compressive strength properties. Two columns, a slab, and cylindrical...
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