On applicability of four intuitive interpretation methods of STATNAMIC test signal

Horvath (1992) proposed four intuitive interpretation methods of Statnamic test signals to detect a "failure Load" at which the corresponding static load - displacement curve begins to plunge. They are called "Velocity Method", "Stiffness Method", "Displacement / Load Slope Method" and "Delta Load - Delta Displacement Method". These methods are applied to 18 Statnamic test cases in Japan to examine applicability of these intuitive methods. The failure loads derived from the intuitive methods were comparable with the yield loads (first limit loads) obtained from the static load tests, if maximum Statnamic loads were 1.2 to 1.4 times as large as the yield loads.