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Evaluation of Structures by Dynamic Load Testing

by Nai C. Yang, Nai C. Yang & Associates, Engineers, New York, NY, USA,
Jerome S. B. Iffland, Nai C. Yang & Associates, Engineers, New York, NY, USA,



Document Type: Proceeding Paper

Part of: Structural Safety Studies

Abstract:

The Frequency Sweep Method for the evaluation of structures by dynamic load testing was developed by the senior author. It is a non-destructive testing (NDT) method that was originally developed for testing of airport pavements. The application has been expanded so that bridge structures and piles can also be satisfactorily tested. It is an in-depth inspection technique that can be used to determine the actual capacities of structures and their component members for costs comparable to visual, judgmental type inspections. After a brief discussion of the historical background, the basic theory for the procedure is presented and the equipment used described. Examples are given of applications which cover pavements, several types of bridge structures and piles. In conclusion, the advantages of the method are summarized and additional applications suggested.

Subject Headings: Load tests | Dynamic loads | Nondestructive tests | Dynamic tests | Bridge tests | Pile tests | Airport and airfield pavements

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