ارزیابی آسیب پذیری تیپ پر تکرار مدرسه اسکلت بتنی کرمانشاه با استفاده از تحلیل غیرخطی و منحنی های شکنندگی لرزه ای

نوع مقاله : علمی - پژوهشی

نویسندگان

1 محقق پسا دکتری، گروه مهندسی عمران، دانشکده مهندسی، دانشگاه رازی، کرمانشاه، ایران

2 دانشیار گروه عمران، دانشکده مهندسی، دانشگاه رازی، کرمانشاه، ایران

چکیده

مدارس و ساختمانهای با کاربری آموزشی در اغلب آیین نامه های طراحی، به دلیل جمعیت زیاد آنها، به عنوان ساختمانهای با اهمیت زیاد در نظر گرفته می شوند. مطابق آیین نامه زلزله ایران، این ساختمانها با هر نوع سیستم سازه ای، باید به نحوی طراحی شوند که در مقابل زلزله طرح، حداقل دارای سطح عملکرد ایمنی جانی باشند. مدارس اسکلت بتنی در استان کرمانشاه، با توجه به ملاحظات اقتصادی، در دسترس بودن مصالح و سرعت اجرای مناسب، دارای فراوانی قابل توجهی هستند. در این میان یک تیپ خاص از این مدارس با فراوانی زیادی در اغلب شهرستانهای استان کرمانشاه اجرا شده است. از طرفی در بررسی فضاهای آموزشی پس از زلزله آبانماه 1396سرپل ذهاب در استان کرمانشاه، مواردی از آسیب های سازه ای و غیر سازه ای در مدارس مشاهده گردیده است. به همین دلیل در این مطالعه عملکرد لرزه ای این تیپ از مدارس، تحت اثر زلزله های محتمل حوزه دور و نزدیک بررسی و آسیب پذیری آنها با روشهای تحلیل استاتیکی غیرخطی و دینامیکی فزاینده IDA ارزیابی می گردد. در ادامه با انجام تحلیل استاتیکی غیرخطی، منحنی پوش سازه استخراج و پارامترهای مهمی چون شکل پذیری و ضریب رفتار محاسبه می گردد. همچنین با انجام تحلیل دینامیکی افزاینده برای این تیپ از مدارس، منحنی های شکست تحت اثر رکوردهای مختلف مقیاس شده با شتاب افزاینده ارائه و مورد بررسی قرار می گیرد. نتایج نشان می دهد رفتار و آسیب پذیری این سازه، بر حسب نوع زمین ساختگاه و رکورد های مختلف حوزه دور و نزدیک زلزله متفاوت می باشد. همچنین سازه این مدرسه علیرغم وجود نامنظمی در پلان از عملکرد قابل قبولی برخوردار است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of vulnerability of popular type of Kermanshah concrete school using nonlinear analysis and seismic fragility curves

نویسندگان [English]

  • Mehdi Kahrizi 1
  • Amir houshang Akhaveissy 2
1 Postdoctoral researcher, Department of Civil Engineering, Engineering Faculty, Razi University, Kermanshah, Iran.
2 Associate Professor, Department of Civil Engineering, Engineering Faculty, Razi University, Kermanshah, Iran.
چکیده [English]

Schools and buildings with educational uses are considered as important buildings in most of the design regulations due to their large population. According to the Iranian Earthquake Regulations, these buildings with any type of structural system, must be designed in such a way that they have at least a level of safety performance against severe earthquakes. Concrete schools in Kermanshah province have a significant frequency due to economic considerations, availability of materials and proper execution speed. Meanwhile, a special type of these schools has been executed with great frequency in most cities of Kermanshah province. On the other hand, in the study of educational spaces after the November 2017 Sarpol-e-Zahab earthquake in Kermanshah province, several cases of structural and non-structural damages have been observed in schools. For this reason, in this study, the seismic performance of this type of schools, under the influence of possible earthquakes, as well as their vulnerability are evaluated by nonlinear static analysis methods and increasing dynamic analysis (IDA). Then, by performing nonlinear static analysis, the envelope curve of the structure is extracted and important parameters such as ductility and the coefficient of behavior are calculated. Moreover, by performing the IDA for this type of schools, the failure curves subjected to various records in comparison with the increasing acceleration are presented and studied. The results show that the behavior and vulnerability of this structure are different according to the type of site and different records of near and far zones of the earthquake. Also, the structure of this school has an acceptable performance despite the irregularity in the plan.

کلیدواژه‌ها [English]

  • Seismic performance"
  • Vulnerability"
  • School"
  • Concrete structure"
  • Nonlinear analysis"
  • "
  • Fragility curve"

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  • تاریخ دریافت: 27 فروردین 1401
  • تاریخ بازنگری: 12 مهر 1401
  • تاریخ پذیرش: 21 مهر 1401

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