پیوندهای مفید
آمار
| تعداد نشریات | 21 |
| تعداد شمارهها | 698 |
| تعداد مقالات | 10,090 |
| تعداد مشاهده مقاله | 71,240,628 |
| تعداد دریافت فایل اصل مقاله | 62,964,283 |
Investigating Efficiency of Shotcrete for Retrofitting Masonry Buildings | ||
| Journal of Rehabilitation in Civil Engineering | ||
| مقاله 4، دوره 5، شماره 1 - شماره پیاپی 9، اردیبهشت 2017، صفحه 47-66 اصل مقاله (1.01 M) | ||
| نوع مقاله: Regular Paper | ||
| شناسه دیجیتال (DOI): 10.22075/jrce.2017.1147.1125 | ||
| نویسندگان | ||
| Mohamad Bbrahim Karbaschi* 1؛ Abdolkarim Abbasi2؛ Mohsen Yazdanian1 | ||
| 1Young Researchers and Elite Club, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran | ||
| 2Assistance Professor, Department of Civil Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran | ||
| تاریخ دریافت: 14 بهمن 1394، تاریخ بازنگری: 06 اردیبهشت 1396، تاریخ پذیرش: 07 اردیبهشت 1396 | ||
| چکیده | ||
| One of a feasible and efficient method to retrofit structures is spraying shotcrete which is widely applied around the world. Shotcrete is concrete with fine aggregates which are sprayed through a hose and by air pressure coat at high velocity onto a surface. In the current research, three masonry schools from different regions of Iran are selected. The retrofitted wall surfaces have been prepared and became flatted, and Schmidt hammer and Ultrasonic tests are performed for each point. The results from the experimental investigation are compared with each other, and some experimental results are compared with theoretical results. To investigate the seismic behavior of structures, one of the schools is chosen and then finite element method is used to do time history analysis regarding four ground motions record. Finally, there was an agreement between experimental and theoretically dynamic modules. In retrofitted conditions, the obtained frequencies are more than the un-retrofitted condition and dynamic time- history analyses have shown that in retrofitted condition, the displacements will decrease and the seismic performance of structure will increase considerably. | ||
| کلیدواژهها | ||
| Masonry؛ Retrofitting؛ Schools؛ Shotcrete؛ Seismic loads | ||
| مراجع | ||
|
[1] Sivaraja, S. and Thandavamoorthy, T. S. (2014). “Retrofitting of seismically damaged masonry structures using FRP-a review”, Research in Civil and Environmental Engineering, Vol. 2, No. 1, pp. 11-23. [2] Borri, A., Castori, G. and Grazini, A. (2009). "Retrofitting of masonry building with reinforced masonry ring-beam", Construction and Building Materials, Vol. 23, No.5, pp. 1892-1901. [3] Bhattacharya, S., Nayak, S. and Chandra Dutta, S. (2014). “A critical review of retrofitting methods for unreinforced masonry structures”, International Journal of Disaster Risk Reduction, Vol.7, pp. 51–67. [4] Borzouie, J., Yekrangnia, M., Mahdizade, A., Seyri, H. and Raissi, M. (2012), “Financial analysis of retrofitting projects and its role on decision making", 15th World Conference on Earthquake Engineering. [5] Yang, K., Joo, D., Sim, J. and Kang, J. (2012), “In-plane seismic performance of unreinforced masonry walls strengthened with unbonded prestressed wire rope units”, Engineering structures, Vol. 44, pp. 449–59. [6] Ma, R., Jiang, L., He, M., Fang, C. and Liang F. (2012), “Experimental investigations on masonry structures using external prestressing techniques for improving seismic performance”, Engineering structures, Vol. 42, pp. 297–307. [7] Turco, V., Secondin, S., Morbin, A. Valluzzi M. R., and Modena, C. (2006). “Flexural and shear strengthening of un-reinforced masonry with FRP bars”, Compos Sci Technol, Vol. 66, No.2 pp. 289–96. [8] Grande, E., Milani, G., Sacco, E. (2008), “Modelling and analysis of FRP-strengthened masonry panels”, Engineering structures, Vol. 30, No.7, pp.1842–60. [9] Hamed, E. and Rabinovitch. (2010). “Failure characteristics of FRP-strengthened masonry walls under out-of-plane loads”, Engineering structures, Vol.32, No.8, pp.2134–45. [10] Willis, C., Seracino, R., Griffith, M. (2010) “Out-of-plane strength of brick masonry retrofitted with horizontal NSM CFRP strips”, Engineering structures, Vol. 32, No.2, pp.547–55. [11] Valluzzi, MR., Tinazzi, D. and Modena C. (2002). “Shear behavior of masonry panels strengthened by FRP laminates”, Construct Build Mater, Vol.16, No.7, pp.409–16. [12] Mahmood, H. and Ingham, J. M. (2011). “Diagonal compression testing of FRP-retrofitted unreinforced clay brick masonry Wallettes”, J Compos Construct, Vol, 15, pp 810–20. [13] Konthesingha, K., Masia, M., Petersen, R., Mojsilovic, N and Simundic, G. (2013). “Page A. Static cyclic in-plane shear response of damaged masonry walls retrofitted with NSM FRP strips – an experimental evaluation”, Eng Struct, Vol, 50, pp. 126–36. [14] Ismail, N., Petersen, R.B. and Masia, M.J. (2011). “Ingham JM. Diagonal shear behaviour of unreinforced masonry wallettes strengthened using twisted steel bars”. Construct Build Mater, Vol. 25, No. 12, pp. 4386–93. [15] Goodwin, C., Tonks, G. and Ingham, J.M. (2011). “Retrofit techniques for seismic improvement of URM buildings”, J Struct Eng Soc New Zeal, Vol. 24, No.1, pp. 30–45. [16] Dizhur, D., Derakhshan, H., Lumantarna, R. and Griffith, M. (2010). “Ingham JM. Out-of-plane strengthening of unreinforced masonry walls using near surface mounted fiber reinforced polymer strips”, J Struct Eng Soc New Zeal, Vol. 23, No. 2, pp. 91–103. [17] ElGawady, M., Lestuzzi, P. and Badoux, M. (2004). “A review of conventional seismic retrofitting techniques for URM”, Proceedings of 13th IB2MC, Amsterdam. Paper No. 89. [18] Abrams, D. P. and Lynch, J. M., (2001). “Flexural behavior of retrofitted masonry piers, KEERC-MAE Joint Seminar on Risk Mitigation for Regions of Moderate Seismicity”, Illinois, USA. [19] Tomazevic, M. (1999). Earthquake-resistant design of masonry buildings, Imperial College Press, London, England. [20] Karantoni, F. and Fardis, M. (1992). “Effectiveness of seismic strengthening techniques for masonry buildings”, Struc Eng, ASCE, Vol. 118, No.7, pp.1884-1902. [21] Kahn, L., (1984), “Shotcrete retrofit for unreinforced brick masonry”, 8th WCEE, USA, pp. 583-590. [22] Teymur, P., Yuksel, E., & Pala, S. (2014). “Behavior of Reinforced Concrete Frames Retrofitted with Shotcrete Panels Connected Only to the Beams”, Arabian Journal for Science and Engineering, Vol. 39, No. 3, pp. 1531-1546. [23] Helal, Y., Garcia, R., Pilakoutas, K., Guadagnini, M., & Hajirasouliha, I. (2016), “Bond of Substandard Laps in Reinforced Concrete Beams Retrofitted with Post-Tensioned Metal Straps” ACI Structural Journal, Vol. 113, No. 6, pp. 1197. [24] Redmond, L., Ezzatfar, P., DesRoches, R., Stavridis, A., Ozcebe, G., & Kurc, O. (2016). “Finite element modeling of a reinforced concrete frame with masonry infill and mesh reinforced mortar subjected to earthquake loading”, Earthquake Spectra, Vol. 32, No. 1, pp. 393-414. [25] Shakib, H., Dardaei, S., Mousavi, M., & Rezaei, M. K. (2016), “Experimental and Analytical Evaluation of Confined Masonry Walls Retrofitted with CFRP Strips and Mesh-Reinforced PF Shotcrete”, Journal of Performance of Constructed Facilities, Vol. 30, No.6. [26] Vandoros, K. G., & Dritsos, S. E. (2006). “Interface treatment in shotcrete jacketing of reinforced concrete columns to improve seismic performance”, Structural Engineering and Mechanics, Vol.23, No. 1, pp. 43-61. [27] Hutchison, D., Yong, P., McKenzie, G., (1984) “Laboratory testing of a variety of strengthening solutions for brick masonry wall panels”, 8th WCEE, San Francisco, USA, 575-582. [28] ASTM C 597-83, (1991). Test for pulse velocity through concrete, ASTM, U.S.A. [29] BS 1881-203. (1986). Recommendations for measurement of velocity of ultrasonic pulses in concrete, BSI, U.K. [30] Computers and Structures. (2012). CSI Analysis Reference Manual for SAP2000, Computer and Structures, Inc., Berkley, California. [31] FEMA-440. (2005). Improvement of nonlinear static seismic procedures, ATC-55 Draft, Washington. | ||
|
آمار تعداد مشاهده مقاله: 1,825 تعداد دریافت فایل اصل مقاله: 1,429 |
||