پیوندهای مفید
آمار
| تعداد نشریات | 9 |
| تعداد شمارهها | 446 |
| تعداد مقالات | 5,719 |
| تعداد مشاهده مقاله | 8,018,462 |
| تعداد دریافت فایل اصل مقاله | 6,527,290 |
بررسی تحلیلی عملکرد لرزهای مهاربند کمانش تاب با طول کوتاه دارای هسته S شکل | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 13، دوره 53، شماره 6، شهریور 1400، صفحه 2451-2474 اصل مقاله (2.76 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2020.17407.6554 | ||
| نویسندگان | ||
| رضا طهماسبی1؛ جلیل شفائی* 2 | ||
| 1دانشکده مهندسی عمران، دانشگاه صنعتی شاهرود | ||
| 2استادیار، دانشکده مهندسی عمران، دانشگاه صنعتی شاهرود، سمنان، شاهرود، ایران | ||
| چکیده | ||
| استفاده از مهاربندهای فولادی در ساختمانهای با سیستم لرزهبر قابخمشی میتواند به طور قابل ملاحظهای تغییر مکان جانبی این سیستم را کنترل کند. یکی از ایرادهای سیستم مهاربندی متداول، کمانش آنها در بارهای فشاری است که میزان استهلاک انرژی سازه را کاهش میدهد. مهاربندهای کمانشتاب (BRBs ) با حذف کمانش کلی مهاربند در فشار ایراد مهاربندهای متداول را برطرف کرده است اما مواردی از قبیل وزن بیش از حد، قیمت بالا و اجرای سخت آنها منجر به معرفی نوع جدیدی از مهاربندهای کمانشتاب با نام مهاربند کمانشتاب طول کوتاه RLBRBگردیده است. با این وجود در مهاربندهای RLBRBبه دلیل حاکم شدن پدیده خستگی کم سیکلی نمیتوان طول مهاربند را بیش از حد کاهش داد تا بتوان به عنوان یک سیستم غیر فعال بعد از زلزله قابلیت تعویض داشته باشد. در این تحقیق یک ایده جدید و نوآورانه به نام مهاربند کمانشتاب طول کوتاه با هسته Sشکل معرفی می گردد که علی رغم طول بسیار کوتاه میتواند عملکردی مشابه سیستم RLBRB و BRBداشته باشد و در عین حال به عنوان یک سیستم کنترل غیر فعال عمل کند. لذا ابتدا مدلهای تحلیلی مهاربندهای RLBRBو BRBsرا در نرم افزار اجزا محدود ABAQUSبر اساس نتایج آزمایشگاهی محققین گذشته صحت سنجی میکنیم. سپس طبق نتایج حاصل از تحلیل، مشخصات مهاربند کمانش تاب طول کوتاه با هسته Sشکل با مهاربندهای RLBRBو BRBمقایسه میگردد. نتایج حاصل از مقایسه طرح پیشنهادی با مهاربندهای کمانش تاب متداول بیانگر این است که علی رغم کوچکتر و سبکتر بودن این مهاربندها رفتاری مشابه مهاربندهای BRBمتداول دارند. | ||
| کلیدواژهها | ||
| سیستم کنترل غیر فعال؛ مهاربند کمانشتاب؛ هسته S شکل؛ خستگی کم سیکلی؛ استهلاک انرژی | ||
| موضوعات | ||
| ارزیابی آسیب پذیری لرزه ای؛ رفتار لرزه ای؛ سیستم های مقاوم لرزه ای غیر فعال؛ مقاوم سازی سازه های بتنی | ||
| عنوان مقاله [English] | ||
| An Analytical Study of Seismic Performance of a New Type of Reduced Length Buckling Restrained Brace (RLBRB) with S-shaped Core | ||
| نویسندگان [English] | ||
| Reza Tahmasebi1؛ Jalil Shafaei2 | ||
| 1Faculty of Civil Engineering, Shahrood University of Technology | ||
| 2Faculty of Civil engineering, Shahrood University of Technology, Shahrood, Semnan, Iran | ||
| چکیده [English] | ||
| The use of steel braces in buildings with a system of seismicity in the moment frame can significantly control the lateral displacement of the structure. One of the problems with the conventional bracing system is their buckling in compressive loads, which reduces the amount of energy absorbed by the structure. The buckling restrained braces (BRBs) have been removed by the removal of buckling bracing at the pressure of common bracing, but such cases as overweight, high prices and rigorous implementations have led to the introduction of a new type of buckling brace called Reduced Length Buckling Restrained Brace (RLBRB). However, in RLBRB, due to the low cyclic fatigue phenomenon, the length of bracing cannot be over-reduced so that it can be replaced as an inactive system after an earthquake. In this research, a new and innovative idea called Reduced Length Buckling Restrained Brace with S-shaped Core is introduced, which, despite its very short length, can overcome all the problems with the RLBRB and BRB system while also serving as a passive control system. Therefore, the analytical model in the ABAQUS finite element software was validated with the experimental results of RLBRB and BRBs of previous research work. Then, according to the results of the analysis, the profile of the longitudinal buckling curves with the S-shaped core is compared with the RLBRB and BRB braces. The results from the comparison of the proposed pattern with conventional buckling braces indicate that, despite the smaller and lighter ones, these braces have the same behavior as the BRB braces. | ||
| کلیدواژهها [English] | ||
| Buckling brace, Buckling brace with S-shaped core, Inactive control system, Low cycle fatigue | ||
| مراجع | ||
|
[1] C. Black, I.D. Aiken, N. Makris, Component testing, stability analysis, and characterization of buckling-restrained unbonded braces (TM), Pacific Earthquake Engineering Research Center, 2002. [2] A. Parry Brown, D. Aiken Ian, F.J. Jafarzadeh, Buckling restrained braces provide the key to the seismic retrofit of the Wallace F. Bennett Federal Building, Modern Steel Construction, 8 (2001) 123-124. [3] A. Wada, M. Nakashima, From infancy to maturity of buckling restrained braces research, in: 13th WCEE, 2004. [4] Q. Xie, State of the art of buckling-restrained braces in Asia, Journal of constructional steel research, 61(6) (2005) 727-748. [5] R. Tremblay, G. Degrange, J. Blouin, Seismic rehabilitation of a four-story building with a stiffened bracing system, in: Proceeding of the 8th Canadian Conference on Earthquake Engineering, vancouver, 1999. [6] A. Watanabe, Y. Hitomi, E. Saeki, A. Wada, M. Fujimoto, Properties of brace encased in buckling-restraining concrete and steel tube, in: Proceedings of ninth world conference on earthquake engineering, 1988, pp. 719-724. [7] P. Clark, Design procedures for buildings incorporating hysteretic damping devices, in: International Post-SMiRT Conference Seminar on Seismic Isolation, Korea, 1999. [8] R. Sabelli, S. Mahin, C. Chang, Seismic demands on steel braced frame buildings with buckling-restrained braces, Engineering Structures, 25(5) (2003) 655-666. [9] S.A.R. Tabatabaei, S.R. Mirghaderi, A. Hosseini, Experimental and numerical developing of reduced length buckling-restrained braces, Engineering Structures, 77 (2014) 143-160. [10] P. Dusicka, J. Tinker, Global restraint in ultra-lightweight buckling-restrained braces, Journal of Composites for Construction, 17(1) (2012) 139-150. [11] R. Tremblay, L. Poncet, P. Bolduc, R. Neville, R. DeVall, Testing and design of buckling restrained braces for Canadian application, in: Proceedings of the 13th world conference on Earthquake Engineering, 2004. [12] M. Mirtaheri, A. Gheidi, A.P. Zandi, P. Alanjari, H.R. Samani, Experimental optimization studies on steel core lengths in buckling restrained braces, Journal of constructional steel research, 67(8) (2011) 1244-1253. [13] N. Hoveidae, B. Rafezy, Overall buckling behavior of all-steel buckling restrained braces, Journal of Constructional Steel Research, 79 (2012) 151-158. [14] N. Hoveidae, Local buckling behavior of core plate in all-steel buckling restrained braces, International journal of steel structures, 15(2) (2015) 249-260. [15] S. Razavi, M. Shemshadian, S. Mirghaderi, S. Ahlehagh, Seismic design of buckling restrained braced frames with reduced core length, in: The Structural Engineers World Congress, 2011. [16] M. Iwata, M. Muraim, T. Nakagomi, Experimental study on brittle fracture of buckling-restrained braces influences of core plate welding specifications and experimental temperatures, in: International Specialty Conference on Behaviour of Steel Structures in Seismic Area (STESSA), 2012. [17] C. Tsai, Y. Lin, W. Chen, H. Su, Mathematical modeling and full-scale shaking table tests for multi-curve buckling restrained braces, Earthquake Engineering and Engineering Vibration, 8(3) (2009) 359-371. [18] T. Usami, C. Wang, J. Funayama, Low-cycle fatigue tests of a type of buckling restrained braces, Procedia Engineering, 14 (2011) 956-964. [19] G. Palazzo, F. López-Almansa, X. Cahís, F. Crisafulli, A low-tech dissipative buckling restrained brace. Design, analysis, production and testing, Engineering Structures, 31(9) (2009) 2152-2161. [20] M. Iwata, M. Murai, Buckling‐restrained brace using steel mortar planks; performance evaluation as a hysteretic damper, Earthquake engineering & structural dynamics, 35(14) (2006) 1807-1826. [21] S. Razavi, S. Mirghaderi, A. Hosseini, M. Shemshadian, Reduced length buckling restrained brace using steel plates as restraining segment, in: Proceedings of the 15th World Conference on Earthquake Engineering, 2012. [22] H. Nakamura, T. Takeuchi, Y. Maeda, Y. Nakata, T. Sasaki, M. Iwata, A. Wada, Fatigue properties of practical-scale unbonded braces, Nippon steel technical report, 82(0) (2000). [23] M. D’Aniello, G. Della Corte, F. Mazzolani, All-steel buckling-restrained braces for seismic upgrading of existing reinforced concrete buildings, Proc. STESSA, 2009 (2009). [24] C.-C. Chou, S.-Y. Chen, Subassemblage tests and finite element analyses of sandwiched buckling-restrained braces, Engineering Structures, 32(8) (2010) 2108-2121. [25] M.E. Eryaşar, C. Topkaya, An experimental study on steel‐encased buckling‐restrained brace hysteretic dampers, Earthquake Engineering & Structural Dynamics, 39(5) (2010) 561-581. [26] Sabelli, R., Pottebaum, W., Brazier, C. and López, W. “Design of a BucklingRestrained Braced Frame Utilizing 2005 Seismic Standards.” ASCE Structures,(2005). [27] Karimi, S., Arbabi, F., "Seismic Evaluation and Cyclic Testing of BucklingRestrained Braces Manufactured in Iran.” Proc. of The 14th World Conference on Earthquake Engineering, Bejing, China, (2008). [28] F. Genna, P. Gelfi, Analysis of the lateral thrust in bolted steel buckling-restrained braces. I: Experimental and numerical results, Journal of structural engineering, 138(10) (2011) 1231-1243. [29] AISC. Seismic Provisions for Structural Steel Buildings including Supplement No.1. AISC-341, American Institute of Steel Construction, (2005). [30] Li, Liang, et al. "A New Buckling-Restrained Brace with a Variable Cross-Section Core." Advances in Civil Engineering 2019 (2019). [31] Hoveidae, N., Tremblay, R., Rafezy, B., & Davaran, A. (2015). Numerical investigation of seismic behavior of short-core all-steel buckling restrained braces. Journal of Constructional Steel Research, 114, 89-99. [32] Razavi, S. A., Kianmehr, A., Hosseini, A., & Mirghaderi, S. R. (2018). Buckling-restrained brace with CFRP encasing: Mechanical behavior & cyclic response. Steel and Composite Structures, 27(6), 675-689. | ||
|
آمار تعداد مشاهده مقاله: 1,593 تعداد دریافت فایل اصل مقاله: 1,636 |
||