بررسی آزمایشگاهی رفتار داخل صفحه نمای آجری و سنگی با دیوار پشتیبان بنایی تحت اثر بارهای رفت و برگشتی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران.

2 استادیار، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران.

3 استادیار، گروه مهندسی عمران، دانشگاه آزاد ملایر، ملایر، ایران.

چکیده

مشاهدات حاصل از زلزله‌های گذشته نشان‌دهنده تأثیر نما در عملکرد لرزه‌ای سازه است. فلسفه ی طراحی لرزه‌ای نما بگونه‌ای است که پایداری دیوار پشتیبان توسط سازه‌ی اصلی و پایداری نما توسط دیوار پشتیبان یا سازه تامین گردیده و این سه جزء دارای حرکات مستقل از یکدیگر باشند. در حال حاضر در صنعت ساختمان به دلیل استفاده از نماهای چسبیده به دیوار پشتیبان، جداسازی حرکت نما از دیوار پشتیبان تامین نمی‌گردد. لذا مهم‌ترین هدف در این تحقیق ، بررسی تأثیر جنس مصالح بر رفتار داخل صفحه دیوارهای بیرونی و نما بر اساس روش‌های اجرایی متداول موجود است.. براین‌اساس تعداد 3 نمونه شامل قاب فولادی ساده به همراه دیوار پشتیبان و نما تحت اثر بارهای جانبی رفت و برگشتی و کنترل شونده توسط جابجایی مورد آزمایش قرار گرفت و نتایج حاصل از رفتار آنها در قالب الگوهای شکست، منحنی‌های چرخه‌ای، پوش‌دوخطی، شکل‌پذیری، کاهش سختی مورد بررسی قرار گرفت. پارامترهای مورد مطالعه در این نمونه‌ها شامل جداسازی دیوار پشتیبان از سازه و نوع مصالح نما بوده است . نتایج حاصل از بررسی نتایج نشان می‌دهد نماهای چسبیده فاقد عملکرد لرزه ای متناسب با اهداف آیین نامه است. همچنین نتایج نشان می‌دهند افزودن نما به سازه بسته به نوع و ویژگی‌های مصالح نما، با افزایش 4 تا 6 برابری درافزایش میزان سختی اولیه ، افزایش مقاومت کل سازه حدود 2 برابر و افزایش پتانسیل آسیب ساختمان را دارد. . در این تحقیق عملکرد لرزه ای نمای آجری در مقایسه با نمای سنگی بهتر بوده و تأثیر کمتری در تغییر عملکرد لرزه‌ای سازه داشته است

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental Study of the Behavior In-Plan the Brick and Stone Facade with the Nonstructural Masonry Walls under the Effect of Cyclic Loads

نویسندگان [English]

  • Ali Mohammadi 1
  • Mahdi Sharifi 2
  • Mehdi Alirezaei 3
1 Ph.D. Student, Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran.
2 Assistant Professor, Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran.
3 Assistant Professor, Department of Civil Engineering, Faculty of Engineering, University of Malayer, Malayer, Iran.
چکیده [English]

Observations from past earthquakes and studies conducted by various re-searchers show the effect of facade on the seismic performance of the structure. Structure, veneer wall and faced need to be stable and inde-pendent in their deformation. The most important goal in the upcoming study is to investigate the effect of materials on the in-plane behavior of external walls and building facades based on the existing common imple-mentation methods. Based on this, 3 samples of Cyclic lateral loads were tested in a controlled manner under displacement and the results of their behavior in terms of form, failure patterns, cyclic curves, cover, bilinear, ductility, reduction of equivalent hardness were investigated. The results of the analyzes showed that adding a facade to the structure, depending on the type and characteristics of the facade materials, has a significant effect on increasing the initial stiffness in range of 4 to 6 time and resistance in range of 2 time. Facade isolation reduces interframe damage and also re-duces facade damage and adverse interframe-frame interaction it seems that the seismic performance of the brick facade is better compared to the stone facade and has less effect on changing the seismic performance of the structure. Key words: facade isolation, seismic performance, brick fa-cade, stone facade

کلیدواژه‌ها [English]

  • facade
  • seismic performance
  • brick facade
  • stone facade
[1] Building and House Research Center (BHRC), Preliminary Report for Kermanshah-Sarpolezahab 96/08/21 Seismic Report, 2018. [In Persian]
[2] Tabeshpour MR, Noorifard A. Behavior of building with eccentrically braced frame and infill wall in the Sarpol-E Zahab earthquake. Civil Infrastructure Researches. 2020 Aug 22; 6(1): 29-40. doi: 10.22091/cer.2020.5409.1201 [In Persian]
[3] American Society of Civil Engineers. ASCE/SEI 7-10 Minimu Design Loads for Buildings and Other Structures. 2016.
[4] Federal Emergency and Management Agency, FEMA E74, Reducing the Risks of Nonstructural Earthquake Damage-Practical Guide. 2012.
[5] McGinley WM, Hamoush S. Seismic masonry veneer: quazi-static testing of wood stud backed clay masonry veneer walls. InStructures Congress 2008: Crossing Borders. 2008 1-10. doi: 10.1061/41016(314)220
[6] Reneckis D, LaFave JM. Out-of-plane seismic performance and detailing of brick veneer walls. Journal of structural engineering. 2010 Jul; 136(7): 781-794. doi: 10.1061/(asce)st.1943-541x.000016
[7] Okail HO, Shing PB, Klingner RE, McGinley WM. Performance of clay masonry veneer in wood‐stud walls subjected to out‐of‐plane seismic loads. Earthquake engineering & structural dynamics. 2010 Nov; 39(14): 1585-1609. doi: 10.1002/eqe.999
[8] Estekanchi HE, Alembagheri M. Seismic analysis of steel liquid storage tanks by endurance time method. Thin-Walled Structures. 2012 Jan 1; 50(1): 14-23. doi: 10.1016/j.tws.2011.08.015
[9] Okail HO, Shing PB, McGinley WM, Klingner RE, Jo S, McLean DI. Shaking‐table tests of a full‐scale single‐story masonry veneer wood‐frame structure. Earthquake engineering & structural dynamics. 2011 Apr 25; 40(5): 509-530. doi: 10.1002/eqe.1045
[10] Turek M, Ventura CE, Kuan S. In-plane shake-table testing of GFRP-strengthened concrete masonry walls. Earthquake Spectra. 2007 Feb; 23(1): 223-237. doi: 10.1193/1.2429564
[11] Ardito R, Taliercio A. Flexural capacity of long-span transversely loaded hollow block masonry walls. Construction and Building Materials. 2019 Sep 30; 220: 489-502. doi: 10.1016/j.conbuildmat.2019.06.042
[12] Desai N, McGinley WM. A study of the out-of-plane performance of brick veneer wall systems in medium rise buildings under seismic loads. Engineering Structures. 2013 Mar 1; 48: 683-694. doi: 10.1016/j.engstruct.2012.12.006
[13] Toubia EA, Lintz JM. In-Plane Loading of Brick Veneer over Wood Shear Walls. The Masonry Society Journal. 2013; 31(1).
[14] Marziale SA, Toubia EA. Analysis of brick veneer on concrete masonry wall subjected to in-plane loads. InStructures 2015 Jun 1; 2: 1-7. doi: 10.1016/j.istruc.2014.11.001
[15] Minaie E, Moon FL, Hamid AA. Nonlinear finite element modeling of reinforced masonry shear walls for bidirectional loading response. Finite Elements in Analysis and Design. 2014 Jul 1; 84: 44-53. doi: 10.1016/j.finel.2014.02.001
[16] Pereira C, Silva A, de Brito J, Silvestre JD. Urgency of repair of building elements: Prediction and influencing factors in façade renders. Construction and Building Materials. 2020 Jul 20; 249: 118743. doi: 10.1016/J.CONBUILDMAT.2020.118743
[17] Qing Y, Wang CL, Meng S, Zeng B. Experimental study on the seismic performance of precast concrete columns with thread-bolt combination couplers. Engineering Structures. 2022 Jan 15; 251: 113461. doi: 10.1016/J.ENGSTRUCT.2021.113461
[18] Wang P, Milani G, Li S. A novel Lower Bound Limit Analysis model with hexahedron elements for the failure analysis of laboratory and thin infill masonry walls in two-way bending. Engineering Structures. 2022 Aug 15; 265: 114449. doi: 10.1016/J.ENGSTRUCT.2022.114449
[19] Hejazi M, Hoseyni M, Çiftçi A. In–plane cyclic behaviour of half-timbered walls with fired brick infill. Journal of Building Engineering. 2022 Aug 15; 54: 104580. doi: 10.1016/J.JOBE.2022.104580
[20] Khalili MR, Baghmisheh AG, Estekanchi HE. Seismic damage and life cycle cost assessment of unanchored brick masonry veneers. Engineering Structures. 2022 Jun 1; 260: 114187. doi: 10.1016/J.ENGSTRUCT.2022.114187
[21] Bauer EL, Souza AL. Failure patterns associated with facade zones and anomalies in the initiation and propagation of degradation. Construction and Building Materials. 2022 Sep 12; 347: 128563. doi: 10.1016/J.CONBUILDMAT.2022.128563
[22] Reneckis D, LaFave JM. Seismic fragility assessment of residential anchored brick veneer walls. In9th US National and 10th Canadian Conference on Earthquake Engineering 2010.
[23] Abrams DP. Strength and behavior of unreinforced masonry elements. 10th World Conference on Earthquake Engineering, Madrid, Spain. 1992; 3475-3480.
[24] Oan AF, Shrive NG. A simple design model for the diagonal shear of partially grouted concrete masonry panels. In9th Int. Mason Conf. 2014; 1-11. 
[25] Turek M, Ventura CE, Kuan S. In-plane shake-table testing of GFRP-strengthened concrete masonry walls. Earthquake Spectra. 2007 Feb; 23(1): 223-237. doi: 10.1193/1.2429564
[26] Ardito R, Taliercio A. Flexural capacity of long-span transversely loaded hollow block masonry walls. Construction and Building Materials. 2019 Sep 30; 220: 489-502. doi: 10.1016/j.conbuildmat.2019.06.042
[27] Vicente RS, Rodrigues H, Varum H, Costa A, Mendes da Silva JA. Performance of masonry enclosure walls: lessons learned from recent earthquakes. Earthquake engineering and engineering vibration. 2012 Mar; 11: 23-34. doi: 10.1007/s11803-012-0095-3
[28] D’Ayala DF, Paganoni S. Assessment and analysis of damage in L’Aquila historic city centre after 6th April 2009. Bulletin of Earthquake Engineering. 2011 Feb; 9: 81-104. doi: 10.1007/s10518-010-9224-4
[29] Magenes G, Penna A, Rota M, Galasco A, Senaldi I. Shaking table test of a full scale stone masonry building with stiffened floor and roof diaphragms. 15th WCEE (electronic source). 2012 Sep.
[30] Neto N, de Brito J. Validation of an inspection and diagnosis system for anomalies in natural stone cladding (NSC). Construction and Building Materials. 2012 May 1; 30: 224-236. doi: 10.1016/j.conbuildmat.2011.12.032
[31] ASTM C-67. Standard Test Methods for Sampling and Testing Brick and Structural Clay Tile. ASTM International. 2019.
[32] ASTM C469-02. American Society for Testing and Materials: Standard Test Method for Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression. ASTM Standard Book 2002.
[33] Shabdin M, Khajeh Ahmad Attari N, Zargaran M. Experimental study on seismic behavior of unreinforced masonry (URM) brick walls strengthened in the boundaries with shotcrete. Journal of Earthquake Engineering. 2021 Jun 7; 25(7): 1381-1407. doi: 10.1080/13632469.2019.1577763
[34] FEMA 461. Interim Protocols For Determining Seismic Performance Characteristics of Structural and Nonstructural Components Through Laboratory Testing. 2007.
[35] Shokrzadeh MR, Nateghi-Alahi F. Evaluation of hybrid NSM-CFRP technical bars and FRP sheets for seismic rehabilitation of a concrete bridge pier. Bridge Structures. 2022 Jan 1; 18(3-4): 75-88. doi: 10.3233/BRS-290180
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