Time and Amplitude Dependent Response of Structures
نویسندگان
چکیده
An understanding of the precise nature of the non -linear response of structures is essential for future improvement of earthquake resistant design procedures. This paper presents a summary of observations of dynamic behaviour which were made on two typical modern buildings during a period of about ten years. These structures underwent numerous tests and experienced three strong earthquake ground motions . The data presented should prove useful for calibration of parameters in theoretical non-linear models. For buildings having an apparent soft -spring-type non-linearity, a partial or complete recovery of the structural stiffness appears to occur following the large strains created by strong ground shaking . The rate and extent of this recovery appear to depend strongly on the strain levels throughout the excitation.
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