EFFECTS OF DIFFERENTIAL GROUND MOTION ON STRENGTH-REDUCTION FACTORS FOR STRUCTURES NEAR EARTHQUAKE FAULTS

Publish Year: 1386
نوع سند: مقاله کنفرانسی
زبان: English
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SEE05_410

تاریخ نمایه سازی: 25 شهریور 1385

Abstract:

We show how the differential strong earthquake ground motion influences the strength-reduction factors of man-made structures in the near-field. We consider fault-normal and fault-parallel near-field displacements. It is shown that the classical recommendations for selection of the strength-reduction factors are usually conservative in the near-field of strong earthquakes for fault-normal pulses. However, the same reduction factors are not conservative for fault-parallel displacements and must be changed. It is recommended that for design in the near-field, for all components of motion and for long periods, the strength-reduction factors should be constant and equal to (2µ -1)1/ 2 where µ is ductility. For periods shorter than about one second, these strength reduction factors should be further reduced by 30 to 40 percent, to account for the effects of wave passage and differential ground motion.

Authors

Zahedi

Assistant Professor, Dept. of Civil Engineering, Iran University of Science & Technology, Narmak, Tehran ۱۶۸۴۶, IRAN

Ghodrati Amiri

Associate Professor, Center of Excellence for Fundamental Studies in Structural Engineering, Dept. of Civil Engineering, Iran University of Science & Technology, Narmak, Tehran ۱۶۸۴۶, IRAN

Saleh Jalali

Ph.D. Candidate, Dept. of Civil Engineering, Iran University of Science & Technology, Narmak, Tehran ۱۶۸۴۶, IRAN

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