ارزیابی اثر نامنظمی پیچشی و شدت لرزه‌خیزی ساختگاه بر پتانسیل خرابی پیشرونده در قاب‌های خمشی فولادی

نوع مقاله : یادداشت پژوهشی

نویسندگان

1 گروه عمران، دانشکده فنی و مهندسی، دانشگاه بین المللی امام خمینی قزوین

2 گروه عمران، دانشکده فنی مهندسی، دانشگاه بین المللی امام خمینی قزوین

چکیده

چکیده: در این مقاله، اثرات شدت نامنظمی پیچشی و میزان مقاومت لرزه‌ای سازه بر پتانسیل خرابی پیشرونده سازه‏های فولادی با سیستم قاب‌ خمشی فولادی ویژه که براساس آیین‌نامه لرزه‌ای معتبر طراحی شده است، ارزیابی شده است. سازه‌ها 3، 6 و 9 طبقه بودند و ساختگاه‌ها با سه سطح لرزه‌خیزی زیاد، متوسط و کم درنظر گرفته شدند و شدت نامنظمی پیچشی در آنها متغییر بود. سازه ها به صورت هم ارز انتخاب شدند یعنی تقریبا وزن لرزه ای و برش پایه یکسان داشتند. بارگذاری ثقلی و لرزه‌ای ساختمانها بر اساس ASCE 7-05 انجام گردید و طراحی فولادی براساسAISC 2010 صورت گرفت. جهت بررسی پتانسیل خرابی پیشرونده طبق آیین‏نامه GSA 2013 تحلیل‌های دینامیکی غیرخطی به صورت سه‌بعدی انجام گردید.‌ نتایج نشان می‌دهد سازه‌های طراحی شده با شدت نامنظمی پیچشی بیشتر، مقاومت بیشتری در برابر گسیختگی پیشرونده دارند. همچنین سازه‌های واقع در ساختگاه با سطح لرزه‌خیزی بالاتر پتانسیل خرابی پیشرونده کمتری دارند. شاخص خرابی تعریف گردید که اثر ارتفاع، نامنظمی پیچشی، شدت لرزه خیزی ساختگاه را در نظر می گیرد و بیانگر میزان مقاومت سازه در برابر گسیختگی پیشرونده است.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of torsional irregularity and seismicity level on progressive collapse potential of steel moment frames

نویسندگان [English]

  • Hamed Yavari 1
  • Mohammad Soheil Ghobadi 1
  • Mansoor Yakhchalian 2
1 Department of Civil Engineering , Faculty of Engineering and Technology, Imam Khomeini International University
2 Department of Civil Engineering , Faculty of Engineering and Technology, Imam Khomeini International University
چکیده [English]

Abstract: In this paper, effects of torsional irregularity and seismic resistance level of structures with steel special moment resisting frame system, which were deigned based on valid codes, have been evaluated. Structures were 3, 6 and 9 story buildings and sites had high, average and low seismicity levels. Also, buildings had different levels of torsional irregularity. Buildings were selected in a manner that had equal seismic mass and base shear. Gravity and seismic loading were applied regarding ASCE 7-05 code and structures were designed in accordance with AISC 2010. In order to perform progressive collapse analysis, the nonlinear dynamic analysis procedure regarding GSA 2013 code was selected. Results show that buildings with greater torsional irregularity have higher strength against progressive collapse failure. Moreover, buildings in region with higher seismicity level have higher strength against progressive collapse failure. A damage index was defined that related to building height, seismicity level of site, and level of torsional irregularity.

کلیدواژه‌ها [English]

  • Progressive collapse
  • Nonlinear dynamic analysis
  • level of torsional irregularity
  • Seismicity level of site
  • Damage index

مراجع

AISC 360, “Specification for structural steel buildings”, Chicago (IL), American Institute of Steel Construction, 2010.
American Society of Civil Engineers (ASCE 7-05), Minimum Design Loads for Buildings and Other Structures, New York. 2005.
ETABS theory manual, Version 15.1.0. Copyright Computers and Structures, Inc., 2015.
FEMA. Federal Emergency Agency. “World trade center building performance study: data collection, preliminary observation and recommendation”, Report: FEMA 403. Washington, D.C, 2002.
General Service Administration (GSA), “Alternate path analysis and design guidelines for progressive collapse resistance”, Washington D.C., 2013.
General Service Administration (GSA), “Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects”, Washington D.C., 2003.
Ghobadi MS, Yavari H, “Progressive collapse vulnerability assessment of irregular voided buildings located in Seismic-Prone areas”, In Structures, 2020, 25, 785-797.
Hayes Jr, J.R., Woodson, SC, Pekelnicky RG, Poland CD, Corley WG, Sozen M, “Can strengthening for earthquake improve blast and progressive collapse resistance?”, Journal of Structural Engineering, 2005, 131 (8), 1157-1177.
Homaioon Ebrahimi A, Martinez-Vazquez P, Baniotopoulos CC, “Numerical studies on the effect of plan irregularities in the progressive collapse of steel structures”, Structure and Infrastructure Engineering, 13 (12), 1576-1583.
https://wiki.csiamerica.com/download/attachments/15074050/ConnectSAP2000v17andETABS2015Installer.EXE?version=1&modificationDate=1441919410528&api=v2
https://wiki.csiamerica.com/download/attachments/15074050/ConnectSAP2000v17andETABS2015Installer.EXE?version=1&modificationDate=1441919410528&api=v2.
Kim, J. and Kim, T., “Assessment of progressive collapse-resisting capacity of steel moment frames”, Journal of Constructional Steel Research, 2009, 65 (1), 169-179.
Kordbagh B, Mohammadi M, “Influence of seismicity level and height of the building on progressive collapse resistance of steel frames”, The Structural Design of Tall and Special Buildings, 2017, 26 (2).
SAP2000 theory manual. Version 17.1.0. Copyright Computers and Structures, Inc., 2015.
Simeon D, Greenberg J, Nelson D, Schmeidler J, Hollander E, “Dissociation and posttraumatic stress 1 year after the World Trade Center disaster: follow-up of a longitudinal survey”, The Journal of clinical psychiatry, 2005, 66 (2), 231-237.
Tan KW, “Preliminary Structural Engineering Study of Explosion Load on Taipei 101”, Ph.D. Thesis. University of Technology, Malaysia, 2010.
Unified Facilities Criteria (UFC), “Design of Buildings to Resist Progressive Collapse”, Department of Defense (DOD), 2005.
Unified Facilities Criteria (UFC), “Design of Buildings to Resist Progressive Collapse”, Department of Defense (DOD), 2009, Including Change, 1-27, 2010.
Unified Facilities Criteria (UFC), “Design of Buildings to Resist Progressive Collapse”, Department of Defense (DOD), 2013.
USGS,http://earthquake.usgs.gov/hazards/designmaps/usdesigndoc.php.
Wee Tan Ko “Preliminary Structural Engineering Study of Explosion Load on Taipei 101”, Ph.D. Thesis, University of Technology, Malaysia, 2010.
Wikipedia contributors, Plasco Building, In Wikipedia, The Free Encyclopedia, from https://en.wikipedia.org/w/index.php?title=Plasco_Building&oldid=846962968, 24 June, 2018.
Yavari H, Ghobadi M S, Yakhchalian M, “Progressive collapse potential of different types of irregular buildings located in diverse seismic sites”, Heliyon, 2019, 5 (1), e01137.

فایل ها

هم رسانی

ارجاع به این مقاله

آمار