ارزیابی عوامل پاسخ لرزه ای برای BRBFs با استفاده از روش FEMA P695
ترجمه نشده

ارزیابی عوامل پاسخ لرزه ای برای BRBFs با استفاده از روش FEMA P695

عنوان فارسی مقاله: ارزیابی عوامل پاسخ لرزه ای برای BRBFs با استفاده از روش FEMA P695
عنوان انگلیسی مقاله: Evaluation of seismic response factors for BRBFs using FEMA P695 methodology
مجله/کنفرانس: مجله تحقیقات فولاد ساختمانی - Journal of Constructional Steel Research
رشته های تحصیلی مرتبط: مهندسی عمران
گرایش های تحصیلی مرتبط: مدیریت ساخت، سازه، زلزله
کلمات کلیدی فارسی: کمربند Buckling-restrained، چهارچوب ساختاری، فولاد، لرزه ای، عامل پاسخ، ساخت
کلمات کلیدی انگلیسی: Buckling-restrained brace، Structural frames، Steel، Seismic، Response factor، Yielding
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
نمایه: Scopus - Master Journal List - JCR
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.jcsr.2018.09.015
دانشگاه: Department of Civil Engineering - Necmettin Erbakan University - Konya 42060 - Turkey
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2018
ایمپکت فاکتور: 2/854 در سال 2017
شاخص H_index: 74 در سال 2019
شاخص SJR: 1/892 در سال 2017
شناسه ISSN: 0143-974X
شاخص Quartile (چارک): Q1 در سال 2017
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 17
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: بله
کد محصول: E10722
فهرست انگلیسی مطالب

Abstract


1- Introduction


2- Overview of the FEMA P695 methodology


3- Design and selection of archetypes


4- Numerical modeling of archetypes and application of the methodology


5- Evaluation of response factors


6- Proposed modifications


7- Evaluation of the proposed modifications


8- Limitations of the study and future research needs


9- Conclusions


References

نمونه متن انگلیسی مقاله

Abstract


This paper reports the details of a numerical study undertaken to evaluate seismic response factors for steel buckling-restrained braced frames (BRBFs) using the FEMA P695 methodology. In the United States, BRBFs are designed according to Minimum Design Loads for Buildings and Other Structures (ASCE 7) and the Seismic Provisions for Structural Steel Buildings (AISC 341). Twenty-four archetypes were designed according to the U.S. specifications and their behavior was assessed by making use of non-simulated collapse models. The interstory drift, brace axial strain and cumulative brace axial strain demands under collapse level ground motions were determined. The results obtained indicate that the current seismic response factors are adequate in terms of interstory drift and cumulative axial strain demands. On the other hand, large differences between the design level and collapse level axial strains were reported, which can result in undesirable brace behavior. Modified approaches were developed to estimate the axial strains for collapse level ground motions. These include a modification to the deflection amplification factor and a modification to the AISC 341 requirements for expected brace deformations. The archetypes were redesigned using the proposed modifications and reevaluated using the FEMA P695 methodology. The results indicate that the proposed modifications result in axial strain demands that are in close agreement with the calculated demands.


Introduction


Steel buckling-restrained braced frames (BRBFs) are often used as lateral load resisting systems against forces produced by wind and earthquakes. BRBFs employ buckling-restrained braces (BRBs) which may be considered as hysteretic dampers. During a seismic event, BRBs yield in tension and compression and contribute to energy dissipation. As shown in Fig. 1, a typical BRB is composed of a core segment, de-bonding material and a buckling restraining mechanism [1,2]. The cross section of the core segment is usually reduced along the length to constrain yielding to a limited domain. The length of the yielding segment can be adjusted to meet the stiffness requirements. The axial load resistance and axial strain capacity of BRBs are the two most important parameters that should be determined at the design stage. BRB manufacturers use these key parameters to develop designs that meet these objectives. The AISC Seismic Provisions for Structural Steel Buildings (AISC 341) [3] provide guidance on the expected BRB deformation demands. According to this specification, BRBs shall be designed, tested and detailed to accommodate deformations corresponding to a story drift of at least 2% of the story height or two times the design story drift, whichever is larger. Qualifying cyclic tests for BRBs also employ the expected deformation demand as the main parameter for the loading protocol. In addition, individual brace test specimens are required to achieve a cumulative inelastic axial deformation of at least 200 times the yield deformation.

  • اشتراک گذاری در

دیدگاه خود را بنویسید:

تاکنون دیدگاهی برای این نوشته ارسال نشده است

ارزیابی عوامل پاسخ لرزه ای برای BRBFs با استفاده از روش FEMA P695
نوشته های مرتبط
مقالات جدید
لوگوی رسانه های برخط

logo-samandehi

پیوندها