تعداد نشریات | 7 |
تعداد شمارهها | 399 |
تعداد مقالات | 5,376 |
تعداد مشاهده مقاله | 5,133,761 |
تعداد دریافت فایل اصل مقاله | 4,759,573 |
تاثیر تسلیح ملات بر عملکرد دیوارهای خشتی | ||
نشریه مهندسی عمران امیرکبیر | ||
مقاله 18، دوره 49، شماره 2، مرداد 1396، صفحه 403-416 اصل مقاله (4.89 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22060/ceej.2016.700 | ||
نویسندگان | ||
اصغر وطنی اسکویی* ؛ محمّد افضلی؛ محمّدرضا مددی پور | ||
دانشکده عمران، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران | ||
چکیده | ||
با توجه به سالنامه اماری درصد قابل توجهی از ساختمانهای مسکونی در ایران مربوط به ساختمانهای خشتی و سنتی میباشد. این ساختمانهای کوتاه مرتبه به علت داشتن سیستم سازهای سنتی قادر به تحمل بارهای جانبی ناشی از زلزله نیستند. در این مقاله راهکارهایی برای افزایش عملکرد این ساختمانها در برابر زلزله ارائه شده است. بدین منظور تعداد 12 عدد دیوار خشتی با انواع مختلف ملات: معمولی، مسلح شده با توری فلزی (با قطر چشمه 7/12 و 05/19 میلیمتر(5/0 و 75/0 اینچ))، توری پلیمری (با قطر چشمه 10 و 25 میلیمتر) و لیف خرما، در ابعاد 22×120×120 سانتیمتر برای بررسی رفتار دیوار و ملات ساخته شدهاند. دیوارها تحت بار جانبی یکنوا بارگذاری شده تا نوع ترکها، نیروی نهایی، تغییرشکل نهایی و جذب انرژی آنها بدست آیند. نتایج حاصل از آزمایش نشان میدهد که ملات به عنوان یکی از ضعیفترین اجزای دیوار میباشد. در دیوارهای مسلح شده با توری پلیمری با قطر چشمه 25 میلیمتر افزایش 83 درصدی در بار نهایی و افزایش 165 درصدی در جذب انرژی مشاهده شده است. در دیوارهای مسلح شده با لیفخرما افزایش 82 درصدی تغییر مکان نهایی و افزایش 162 درصدی در جذب انرژی مشاهده شده است. بنابراین میتوان با تقویت ملات با توری و لیف خرما عملکرد دیوار را بهبود بخشید. | ||
کلیدواژهها | ||
خشت؛ آزمایش بارگذاری جانبی؛ لیف خرما؛ توری فلزی؛ توری پلیمری | ||
موضوعات | ||
مقاوم سازی سازه های بنائی | ||
عنوان مقاله [English] | ||
Effect of reinforcement the mortar on adobe walls performance | ||
نویسندگان [English] | ||
A. Vatani Oskouei؛ M. Afzali؛ M. Madadipour | ||
Department of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran | ||
چکیده [English] | ||
Present study investigates an experimental performance of mud brick wall under static lateral load. The size of bricks was about 22×22×7 cm3 (face × bed × end). For wall specimens, two types mortar was used: a) non-reinforced mortar, b) reinforcement mortar. For reinforcement mortar many types such as: metal mesh (mesh size: 0.5 and 0.75 inches), polymeric mesh (mesh size: 10 and 25 mm) and palm fiber considered was used. First mechanical properties of each types of mortar have been determined. Then the 12 wall with dimensions of 120 × 120 × 22 cm3 are made with six different kinds of mortar. Walls are loaded under static lateral load in order to evaluate their cracks pattern, load capacities, deformability and energy absorption characteristics. Cracks in the specimens occurred between the first and the second row that caused the failure. The mortar was vulnerable part of conventional walls (unreinforced mortar). Ultimate strength of walls with mortar reinforced by polymer mesh (mesh size was 25 × 25 mm) increased the load and energy capacity to 83.04% and 158% respectively. The palm fibers increased the load carrying capacity about 82.14% and energy absorption capacity about 247%. Test result was shown that using palm fiber and polymer mesh with diameter of 25 mm in mortar can increase adobe wall performance. | ||
کلیدواژهها [English] | ||
Mud brick, Static lateral load tests, Palm fiber, Mortar, Mud brick wall, Metal mesh | ||
سایر فایل های مرتبط با مقاله
|
||
مراجع | ||
[1] A.U. Pope, Introducing Persian Architecture, Soroush press, 1976. [2] F. Tootoonchy, B. Asgarian, F. Danesh, Experimental in-plane behavior and retrofitting method of mud-brick walls, International Journal of Civil Engineering, 13(2)(2015) 191-201. [3] A. Garg, H. Yadav, Study of Red Mud as an Alternative Building Material for Interlocking Block Manufacturing in Construction Industry, (2015). [4] A.A. El-Derby, A. Elyamani, The adobe barrel vaulted structures in ancient Egypt: a study of two case studies for conservation purposes, Mediterranean Archaeology and Archaeometry, 16(1) (2016) 295-315. [5] M.I. Gomes, M. Lopes, J. De Brito, Seismic resistance of earth construction in Portugal, Engineering Structures,33(3) (2011) 932-941. [6] J. Revuelta-Acosta, A. Garcia-Diaz, G. Soto-Zarazua, E.Rico-Garcia, Adobe as a sustainable material: A thermal performance, Journal of Applied Sciences(Faisalabad),10(19) (2010) 2211-2216. [7] H. Binici, O. Aksogan, D. Bakbak, H. Kaplan, B. Isik, Sound insulation of fibre reinforced mud brick walls, Construction and Building Materials, 23(2) (2009) 1035-1041. [8] Zomarshidi H., “Iranian architecture of traditional materials science” Tehran, Zomorod Publishing, 1390,(In Persian.) [9] Shpoor, T.; Neeri, A.; “Design masonry buildings” Tehran,science and literature Publishing, 1383, In Persian. [10] Mirgoozar langerody, M.M., Mirgoozar langerody,S.S. and Rajabi, A. Retrofitting adobe buildings against earthquake, Retrofit National Conference on Iran, Yazd, Yazd University; (1387) , In Persian. [11] E.L. Tolles III, H. Krawinkler, Seismic studies on smallscale models of adobe houses, (1990). [12] M. Blondet, G.V. Garcia, S. Brzev, A. Rubiños,Earthquake-resistant construction of adobe buildings:A tutorial, EERI/IAEE world housing encyclopedia,(2003). [13] L. Turanli, A. Saritas, Strengthening the structural behavior of adobe walls through the use of plaster reinforcement mesh, Construction and Building Materials, 25(4) (2011) 1747-1752. [14] Oskouei, A.Vatani., M. Afzali. and M. Madadipour.,“Effect of lime and rice husk ash stabilization and compaction on mud brick reinforced with synthetic fibers”, Structural Analysis of Historical Constructions –Jerzy Jasieńko (ed) DWE, Proland, 978-83-7125-216-7,2012. [15] Oskouei, A.Vatani., M. Afzali. and M. Madadipour.,“Effect of some natural additives on the mechanical properties of mud brick”, Structural Analysis of Historical Constructions – Jerzy Jasieńko (ed) DWE, Proland, 978-83-7125-216-7, 2012. [16] Oskouei, A.Vatani., M. Afzali. and M. Madadipour.,“Effect of some synthetic fibers on the mechanical properties of mud brick”, Structural Analysis of Historical Constructions – Jerzy Jasieńko (ed) DWE, Proland, 978-83-7125-216-7, 2012. [17] Ş. Yetgin, Ö. Çavdar, A. Cavdar, The effects of the fiber contents on the mechanic properties of the adobes,Construction and Building Materials, 22(3) (2008) 222-227. [18] Dowling Dominic., “Improved adobe mud brick”, in application –child-care center construction in El Salvador, 13thWorld Conference on Earthquake Engineering. [19] ASTM, Volume 04.08, Soil and Rock (I:D420-D5779),March 2003. [20] V. Maniatidis, P. Walker, A review of rammed earth construction, Innovation Project “Developing Rammed Earth for UK Housing”, Natural Building Technology Group, Department of Architecture & Civil Engineering, University of Bath, (2003). [21] ASTM, “Stadard test method for total evaporable moisture content of aggregate by drying”, ASTM C566-97, West Conshohocken, PA, USA, 1997. [22] M. O'dogherty, A review of research on forage chopping, Journal of Agricultural Engineering Research, 27(4)(1982) 267-289. [23] M. O'Dogherty, J. Huber, J. Dyson, C. Marshall, A study of the physical and mechanical properties of wheat straw,Journal of Agricultural Engineering Research, 62(2)(1995) 133-142. [24] Nazari, M., Jafari, A., Tabatabaifar, A., Sharifi;Malvajerd, A., Tavakoli, H.; “The effect of moisture content, fast loading and high areas on the tensile strength of alfalfa”, Fifth National Conference on Agricultural Machinery Engineering, Mechanisation Ferdowsi University of Mashhad, 2008. [25] Islamic Republic of Iran, Iranian National Standardization Organization, Clay brick- Specifications and Test Methods, INSO 7 5th .Revision, 2016,ICS:91.100.15, In Persian. [26] L. Mbumbia, A.M. de Wilmars, Behaviour of lowtemperature fired laterite bricks under uniaxial compressive loading, onstruction and Building Materials, 16(2) (2002) 101-112. [27] ASTM C.496-96 : Standard test method for splitting tensile strength of cylindrical concrete speciments. [28] A.W. Hendry, Structural masonry, Scholium International, 1990. [29] C. Kouakou, J. Morel, Strength and elasto-plastic properties of non-industrial building materials manufactured with clay as a natural binder, Applied Clay Science, 44(1) (2009) 27-34. [30] NZ 4297; “Earth Building Association of New Zealand’,Engineering design of earth buildings, New Zealand:EBA, 1998. [31] Q. Piattoni, E. Quagliarini, S. Lenci, Experimental analysis and modelling of the mechanical behaviour of earthen bricks, Construction and Building Materials,25(4) (2011) 2067-2075. [32] R. Illampas, D.C. Charmpis, I. Ioannou, Laboratory testing and finite element simulation of the structural response of an adobe masonry building under horizontal loading, Engineering Structures, 80 (2014) 362-376. | ||
آمار تعداد مشاهده مقاله: 1,652 تعداد دریافت فایل اصل مقاله: 1,817 |