پیوندهای مفید
آمار
| تعداد نشریات | 8 |
| تعداد شمارهها | 437 |
| تعداد مقالات | 5,647 |
| تعداد مشاهده مقاله | 7,643,972 |
| تعداد دریافت فایل اصل مقاله | 6,319,831 |
مقایسه ضرایب عملکرد لرزهای مورد نیاز در سیستم قاب خمشی ویژه فولادی تحت تأثیر زلزلههای حوزه دور با حوزه نزدیک | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 4، دوره 50، شماره 1، فروردین و اردیبهشت 1397، صفحه 37-52 اصل مقاله (2.28 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2016.687 | ||
| نویسندگان | ||
| کاوه موسوی درزیکلائی؛ تورج تقی خانی* | ||
| دانشکده مهندسی عمران و محیط زیست، دانشگاه صنعتی امیرکبیر، تهران، ایران | ||
| چکیده | ||
| تفاوت رفتار سیستمهای مختلف سازه ای تحت زمین لرزه های ثبت شده در حوزه نزدیک، بررسی و بازنگری ضرایب طراحی لرزه ای این سیستمها را اجتناب ناپذیر نموده است. این مطالعه به ارزیابی «ضرایب عملکرد لرزهای» قاب خمشی ویژه فولادی تحت زلزله های حوزه نزدیک می پردازد. در این راستا «مدلهای نمونهای» سه دهانه شامل سازه های 1،2،3،5،8 و 15طبقه با دهانههای 4 و 8متر برای منطقهای با لرزهخیزی خیلی زیاد طراحی و مدل می گردند. ابتدا با انجام آنالیزهای استاتیکی افزایشی ضرایب «اضافه مقاومت» و «شکلپذیری مبتنی بر پریود» تعیین شده و سپس با انجام آنالیزهای دینامیکی غیرخطی افزایشی تحت تاثیر زلزله های حوزه دور، حوزه نزدیک بدون پالس و حوزه نزدیک باپالس، وضعیت عملکردی مدلها مشخص و صحت ضریب رفتار ارزیابی می گردد. نتایج نشان میدهند که به جز سازههای 15طبقه، «ضریب رفتار» و «ضریب اضافه مقاومت» سیستم، تحت تاثیر زلزلههای حوزه دور مناسب می باشند ولی بهرهگیری از همین ضرایب برای سازههای کوتاهپریود تحت زلزلههای حوزه نزدیک باپالس مناسب نبوده و برای نیل به اهداف عملکرد لرزه ای، بازنگری آن ضروری می باشد. | ||
| کلیدواژهها | ||
| ضرایب عملکرد لرزه ای؛ زلزله حوزه نزدیک؛ قاب خمشی ویژه فولادی؛ آنالیز دینامیکی افزایشی؛ آنالیز استاتیکی افزایشی | ||
| موضوعات | ||
| تحلیل خطی و غیر خطی؛ دینامیک سازه؛ زلزله های حوزه دور؛ زلزله های حوزه نزدیک؛ ضوابط لرزه ای و استانداردها؛ عملکرد لرزه ای روش های متداول مقاوم سازی | ||
| عنوان مقاله [English] | ||
| Seismic Performance Factors of Special Moment Resisting Steel Frames Subjected to Far- and Near-Field Ground Motions | ||
| نویسندگان [English] | ||
| K. Mousavi Darzikolaei؛ T. Taghikhany | ||
| Faculty of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran | ||
| چکیده [English] | ||
| Different and to some extent poor seismic performance of structural systems under various types of near-field earthquake excitation, made re-assess and re-evaluation of “seismic performance factors” used in building codes, an inevitable important task. In this paper, seismic performance of special moment resisting steel frame system (SMRSF) under near-Field (with and without pulse) and far-field record excitation is investigated through FEMA P695 methodology. In order to cover the “design space” of the selected structural system, archetypes consisted of 1, 2, 3, 5, 8 and 15 story buildings with 4 and 8 meters bay are selected and designed based on Iran’s national building codes for a “very high seismic” region. Corresponding non-linear models are built based on most recent advances in structural components modeling using OpenSees software. At first by performing non-linear static analysis, overstrength factor and period-based ductility are evaluated and quality of non-linear models is controlled. Afterwards, incremental dynamic analyses (IDA) are performed using far-field, near-field pulse like and non pulse like records. Finally, by using IDA results, “adjusted collapse margin ratio (ACMR)” of the models are calculated and compared to “allowable collapse margin ratio (ACMRallowable)”. Therefore, seismic performance of the models are evaluated and “response modification coefficient” (R) for the system is investigated and compared with this factor under different types of ground motion records. Results indicated that except for 15 story buildings, proposed “response modification coefficient” and “over-strength factor “for SMRSF system are adequate under far-field records. However under pulse like near field ground motions, it was observed that short period structures are to some extent vulnerable. For long period structures, in contrast with far-field records, seismic performance of structures designed by prescriptive provisions has adequate performance under near-field pulse like motions. | ||
| کلیدواژهها [English] | ||
| Seismic Performance Factors, Near-Field Earthquake, Steel Special Moment Frame System, incremental dynamic analysis (IDA), Nonlinear Static Analysis (Pushover Analysis) | ||
|
سایر فایل های مرتبط با مقاله
|
||
| مراجع | ||
|
[1] S. Li, L.-l. Xie, Progress and trend on near-field problems in civil engineering, ACTA Seismologica Sinica, 20(1) (2007) 105-114. [2] J.P. Stewart, S.-J. Chiou, J.D. Bray, R.W. Graves, P.G. Somerville, N.A. Abrahamson, Ground motion evaluation procedures for performance-based design, Pacific Earthquake Engineering Research Center (PEER), 2001. [3] P.G. Somerville, Development of an improved representation of near-fault ground motions, in: SMIP98 Proceedings, Seminar on Utilization of Strong-Motion Data, California Division of Mines and Geology, Sacramento, CA, 1998, pp. 1-20. [4] B. Alavi, H. Krawinkler, Consideration of Near-Fault Ground Motion Effects in Seismic Design, in: 12WCEE, Auckland, New Zeland, 2000, pp. 2665. [5] B. Alavi, H. Krawinkler, Effects of near-fault ground motions on frame structures, Department of Civil and Environmental Engineering, Stanford University, CA, USA, 2001. [6] S.Y. Yun, O. Ronald, C. Hamburger, A. Cornell, D.A. Foutch., Seismic Performance Evaluation for Steel Moment Frames, Journal of Structural Engineering, (2002) 534-545. [7] S. Krishnan, C. JI, D. Komatitsch, J. Tromp, Performance of two 18-story steel moment frame buildings in southern California during two large simulated San Andreas earthquakes, Earthquake Spectra, 22(4) (2006) 1035–1061. [8] E. Kalkan, S.K. Kunnath, Effects of fling step and forward directivity on seismic response of buildings, Earthquake Spectra, 22(2) (2006) 367-390. [9] C.A. Maniatakis, I.M. Taflampas, C.C. Spyrakos, Identification of Near-fault Earthquake Record Characteristics, in: The 14th World Conference on Earthquake Engineering, Beijing, China, 2008. [10] F. Zareian, D. Lignos, H. Krawinkler, Evaluation of seismic collapse performance of steel special moment resisting frames using FEMA P695 (ATC-63) methodology, in: Proceedings of the 2010 Structures Congress, ASCE, 2010. [11] F. Zareian, D. Lignos, H. Krawinkler, Seismic design modification factors for steel special moment-resisting frames, in: International Workshop on Protection of Build Environment against Earthquakes, Ljubljana, Slovenia, 2010. [12] S. Krishnan, M. Muto, Sensitivity of the Earthquake Response of Tall Steel Moment Frame Buildings to Ground Motion Features, Journal of Earthquake Engineering, 17(5) (2013) 673-698. [13] A. Mathiasson, R.A. Medina, Seismic Collapse Assessment of a 20-Story Steel Moment-Resisting Frame Structure, Buildings, 4 (2014) 806-822. [14] Applied Technology Council, FEMA P695: Quantification of building seismic performance factors, Federal Emergency Management Agency (FEMA), Washington D.C., 2009. [15] Ministry of Housing and Urban Development, Iranian national building code part 10: Design and Construction of Steel structures, Iran, 2009. [In Persian] [16] Building and Housing Research Center, Iranian Code of practice for seismic resistant design of buildings, Iran, 2005. [In Persian] [17] D. Lignos, Sidesway collapse of deteriorating structural systems under seismic excitations, Department of Civil and Environmental Engineering, Stanford University, Stanford, CA, USA, 2008. [18] OpenSees, Open System for Earthquake Engineering Simulation, in, Pacific Earthquake Engineering Research Center (PEER), 2007. [19] A. Gupta, H. Krawinkler, Seismic Demands for Performance Evaluation of Steel Moment Resisting Frame Structures, Department of Civil Engineering, Stanford University, Stanford, CA, 1999. [20] H. Krawinkler, V. Bertero, E. Popov, Inelastic Behavior of Steel Beam-to-column Sub-assemblages, Earthquake Engineering Research Center (EERC), University of California at Berkeley, CA, 1971. [21] D. Vamvatsikos, M. Eeri, Cornell C. A., Applied Incremental Dynamic Analysis, in: 12th European Conference on Earthquake Engineering, London, UK, 2002. [22] J.W. Baker, Quantitative Classification of Near-Fault Ground Motions Using Wavelet Analysis, Bulletin of the Seismological Society of America, 97(5) (2007) 1486-1501. | ||
|
آمار تعداد مشاهده مقاله: 2,135 تعداد دریافت فایل اصل مقاله: 2,647 |
||
