Abstract

T N this paper an experimental method for the de•*• termination of the degree of end restraint of structural members is presented together with a method for determining the magnitude of load in an axially loaded member by means of a single easily made measurement on the member as it stands in the stressed conditions. These two unknowns are made determinable by the fact that the natural vibration frequency of a structural member is a definite function of both the degree of end restraint and the axial load existing in the member. Wi th this established it remains to determine the actual relations existing between first, the natural vibration frequency and the end restraint of the member, and, second, the natural vibration frequency and the axial load in the member.

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