Determination of Material Damping Based on Dissi-pated Energy in Concrete Dams by Finite Element Method
محل انتشار: نهمین کنفرانس بین المللی آکوستیک و ارتعاشات
سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 498
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شناسه ملی سند علمی:
ISAV09_013
تاریخ نمایه سازی: 11 دی 1398
چکیده مقاله:
In the present paper, a new numerical approach here named as Developed Energy Dissipation Algorithm (DEDA), which is based upon finite element analysis is utilized for evaluating the material damping ratio in the dynamic time history analysis of concrete gravity dams. In this approach, damping ratio takes a function of unit dissipation energy, which is also a function of stress amplitude. An iterative process is used to update the damping ratio in every time step of analysis. For the numerical example, the Pine Flat concrete gravity dam under Taft ground motion is selected. The dam crest displacement of the DEDA approach is compared with the so-called computer program EAGD-84 and the results show good agreements. Com-paring the results of the DEDA approach with the Traditional Rayleigh Damping Method (TRDM) gives the reasonable value, which agrees with the field tests.
کلیدواژه ها:
Concrete gravity dams ، Material damping ، Finite element method ، Seismic anal-ysis ، Energy dissipation per unit volume.
نویسندگان
Amir Souri
Ph.D. Student
Hassan Mirzabozorg
Associate Professor, Faculty of Civil Engineering, K. N. Toosi University of Technology, No. ۱۳۴۶, Valiasr Street, Mirdamad Intersection, ۱۹۹۶۷-۱۵۴۳۳, Tehran, Iran.
Morteza Javadi
Assistant Professor, Faculty of Mining, Geophysics, and Petroleum Engineering, Shahrood University of Technology, Shahrood, Iran,