Damage-Based Yield Point Spectra Subjected To the Mainshock-Aftershock Sequence-Type Ground Motions


Abstract eng:
This paper presents a new modified yield point spectra (YPS) method, which can be used to assure seismic design safety. Historical earthquake data have shown that structures suffering from aftershock ground motions may become damaged and even collapse. More than 267 mainshock-aftershock sequence-type ground motion records were employed to calculate the dynamical response of single-degree-of-freedom (SDOF) systems. This data and the strength reduction factor were used to assess ground-motion damage using ductility demand and accumulated damage demand. This research and resultant modified yield point spectra led to an assessment of strength demand under mainshock ground motions and mainshockaftershock sequence-type ground motions, respectively. Findings demonstrated that the strength demand under mainshockaftershock sequence-type ground motions will increase by 10% to 40%. Meanwhile, the modified yield point spectra (YPS) were used to assess damage of structures after earthquakes, and determine admissible design regions of strength and stiffness to satisfy performance-based design objectives. Finally, a test using an RC structure and the modified YPS method was employed to verify the rationality of the new method.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 755.:
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