DYNAMIC CHARACTERISTICS EVALUATION OF MASJED-SOLEIMAN EMBANKMENT DAM BY AMBIENT VIBRATION AND EXPLOSION TESTS

سال انتشار: 1382
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,792

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شناسه ملی سند علمی:

SEE04_SF40

تاریخ نمایه سازی: 10 آبان 1384

چکیده مقاله:

A complete ambient vibration test of the Masjed-Soleiman (MS) embankment dam due to lowlevel loads such as wind, machinery activities, low level tectonic activities, spilling of the reservoir and water exit from bottom outlet was performed. These kinds of ambient vibration tests are suitable for manifesting smaller modes of vibration of the dam body.Furthermore, the response of the dam body to large explosive charges in quarries and underground power plant house were measured. Since, the energy resulted from the blastgenerated ground motion contains the high frequency waves, this kind of test is appropriate for exciting high vibration modes of the dam. The results of these tests have been used to evaluate the natural frequencies, mode shapes and modal damping of the dam body. In order to investigate the effects of water level variation on modal parameters of the dam body, the ambient vibration tests have been done during impounding and spilling the reservoir. Finally the 3-D modal analysis of the dam body was performed using ANSYS software. Dynamic soil properties of the dam body and foundation materials were calculated based on results of the cyclic triaxial and resonant column tests, consulting engineering reports and appropriate geoseismic refraction investigations. Foundation interaction effects were also investigated by modeling different foundation depth and inertial properties. In this paper, the numerical analysis results and also its comparison with the dynamic characteristics of the dam body obtained from the full-scale dynamic tests will be presented and discussed

نویسندگان

M.K. JAFARI

Assoc. Professor, Director of Geotechnical Eng., Research Center of IIEES, Tehran, I.R. Iran

M. DAVOODI

Ph.D. Student of IIEES, Tehran, I.R. Iran,

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