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Journal of Rehabilitation in Civil Engineerin، جلد ۶، شماره ۲، صفحات ۵۱-۶۰
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
SOIL STRUCTURE INTERACTION EFFECTS ON HYSTERETIC ENERGY DEMAND FOR STIFFNESS DEGRADING SYSTEMS BUILT ON FLEXIBLE SOIL SITES |
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| چکیده انگلیسی مقاله |
This paper aims to study the influence of soil-structure interaction on plastic energy demand spectra directly derived from the energy-balance equations of soil-shallow-foundation structure with respect to an ensemble of far-field strong ground motions obtained from Pacific Earthquake Engineering Research (PEER) database and recorded on alluvium soil. The superstructure is modeled as a single-degree-of-freedom (SDOF) oscillator with Modified Clough stiffness degrading model resting on flexible soil. The soil beneath the superstructure is considered as a homogeneous elastic half space and is modeled through the concept of Cone shallow foundation Models. A parametric study is carried out for 2400 soil-structure systems with various aspect ratios of the building as well as non-dimensional frequency as a representative of the structure-to-soil stiffness ratio having a wide range of fundamental fixed-base period and target ductility demand values under a family of 19 earthquake ground motions. Results show that generally for the structure located on softer soils severe dissipated energy drop will be observed with respect to the corresponding fixed-base system. The only exception is for the case of short period slender buildings in which the hysteretic energy demand of soil-structure systems could be up to 70% larger than that of their fixed-base counterparts. Moreover, dissipated energy spectra are much more sensitive to the variation of target ductility especially for the case of drastic SSI effect. |
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| نویسندگان مقاله |
بهنود گنجوی |
department of civil engineering, university of mazandaran
سازمان اصلی تایید شده: دانشگاه مازندران (Mazandaran university)
مجید برارنیا |
department of civil, water amp;amp; environmental engineering, shahid beheshti university, tehran, iran
سازمان اصلی تایید شده: دانشگاه شهید بهشتی (Shahid beheshti university)
احمد آزاد |
department of civil engineering, university of mazandaran, babolsar, iran
سازمان اصلی تایید شده: دانشگاه مازندران (Mazandaran university)
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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