پیوندهای مفید
آمار
| تعداد نشریات | 21 |
| تعداد شمارهها | 673 |
| تعداد مقالات | 9,831 |
| تعداد مشاهده مقاله | 69,808,711 |
| تعداد دریافت فایل اصل مقاله | 49,169,497 |
بررسی اثر فیبر پلیپروپیلن بر رفتار در برابر حریق قطعات بتنی تونلها | ||
| مهندسی زیر ساخت های حمل و نقل | ||
| مقاله 6، دوره 4، شماره 4 - شماره پیاپی 16، بهمن 1397، صفحه 89-111 اصل مقاله (1.73 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22075/jtie.2018.15569.1331 | ||
| نویسندگان | ||
| وحیدرضا افخمی1؛ احسان دهقانی* 2 | ||
| 1دانشجوی دکتری، مهندسی سازه، دانشگاه قم، قم، ایران | ||
| 2استادیار، دانشکده فنی و مهندسی، دانشگاه قم | ||
| تاریخ دریافت: 14 مرداد 1397، تاریخ بازنگری: 31 شهریور 1397، تاریخ پذیرش: 12 مهر 1397 | ||
| چکیده | ||
| با توجه به اهمیت سامانهی قطار شهری، در طراحی قطعات بتنی تونلهای قطار شهری علاوه بر عوامل لرزهای، عواملی مثل حریق نیز باید در نظر گرفته شود تا سرویسدهی این سامانه بدون وقفه صورت گیرد و دچار اختلال نشود. در ساخت قطعات بتنی تونلها از ردهی بتنهای پرمقاومت بهره گرفته میشود که علیرغم رفتار لرزهای مناسب، در برابر افزایش دما و حریق، عملکرد مناسبی ندارد. آتشسوزی طی یکسری فعل و انفعلات میتواند منجر به کاهش ضخامت قطعات بتنی تونلها شده و ایمنی این قطعات را تحت تاثیر خود قرار دهد. در تحقیق پیشرو با معرفی یک مدل مبتنی بر نرمافزار اجزای محدود آباکوس، رفتار قطعات بتنی تونلها در برابر حریق مورد ارزیابی قرار گرفته است. در ادامه در جهت اطمینان از نتایج تحقیق با معرفی و اعمال انواع منحنیهای حریق بر قطعهی بتنی، اثر اضافه کردن فیبر پلیپروپیلن بر مخلوط بتنی، تحت بررسی قرار گرفته است. نتایج حاصل از این تحقیق بیانگر این موضوع است که اضافه کردن حداقل ۰.۹ کیلوگرم فیبر پلیپروپیلن، بصورت یکنواخت، در هر متر مکعب مخلوط بتنی درقطعات بتنی تونلها، تا حد زیادی منجر به بهبود رفتار این قطعات در برابر انواع حریقهای مورد انتظار شده و از تورق و کاهش ضخامت این قطعات جلوگیری میکند. | ||
| کلیدواژهها | ||
| قطعات بتنی؛ حریق؛ فیبر پلیپروپیلن؛ نرمافزار آباکوس؛ تورق | ||
| عنوان مقاله [English] | ||
| Evaluate Polypropylene Fiber Effect on Concrete Segments of Tunnel under Fire | ||
| نویسندگان [English] | ||
| Vahid Reza Afkhami1؛ Ehsan Dehghani2 | ||
| 1دانشجوی دکتری سازه، دانشکده فنی و مهندسی، دانشگاه قم | ||
| 2Assistant Professor, Faculty of Engineering, University of Qom | ||
| چکیده [English] | ||
| In today`s world urban railway is one of the important transportation systems that should be examined against various environmental phenomena including fire condition to service permanent citizens. Usually construction of concrete segments of the tunnel simultaneous to used high strength concrete (HSC) that have bad reaction under fire in spite of good seismic reaction. When a fire occurs in tunnel surrounding, some interaction occurred in concrete segments of the tunnel that can reduce the thickness and decrease the safety of these segments. Most of the researches in applying heat effect on concrete segments of the tunnel are experimental and under this situation and analytical or numerical researches in this issue are low. This paper presents an analytical model using ABAQUS software based on the finite element for evaluating concrete segments of tunnel behaviour under fire condition. To ensure the safety of results, some fire curves are applied and effect of Polypropylene fiber in the concrete mix is evaluated. Results show that adding minimum 0.9 Kg per cubic meter of concrete mix in concrete segments of tunnel causing loss of spalling and improve fire behavior interaction. | ||
| کلیدواژهها [English] | ||
| Concrete segments, fire, Polypropylene fiber, Abaqus software, Spalling | ||
| مراجع | ||
|
Abaeian, R., Pesaran Behbahani, H. and Jalali Moslem, S. 2018. “Effects of high temperatures on mechanical behavior of high strength concrete reinforced with high performance synthetic macro polypropylene (HPP) fibres”. Constr. Build. Mater., 165: 631-638.
Abaqus. 2014. “Abaqus analysis theory manual version 6.14”. United Kingdom.
ACI 318. 2012. “Building code requirements for reinforced concrete. American Concrete Institute.
Ahmadipourinaeim, S. H. and Saberi, Y. 2014. “Study on the effect of polypropylene fibers on strength and heat resistance of concrete”. World Appl. Sci. J., 31(5): 767-770.
Aslani, F. and Samali, B. 2014. “High strength polypropylene fibre reinforcement concrete at high temperature”. Fire Technol., 50(5): 1229-1247.
Bahr, O., Schaumann, P., Bollen, B. and Bracke, J. 2013. “Young’s modulus and Poisson’s ratio of concrete at high temperatures: Experimental investigations”. Mater. Design , 45: 421-429.
Caner, A. and Boncu, A. . 2009. “Structural fire safety of circular concrete railroad tunnel linings”. J. Struct. Eng., 135: 1081-1092.
Chung, J. H. and Consolazio, G. R. 2005. “Numerical modeling of transport phenomena in reinforced concrete exposed to elevated temperatures”. Cement Concrete Res., 35: 597-608.
Daian, J. F. and Gallé, C. 2000. “Gas permeability of unsaturated cement-based materials: Application of a multi-scale network model”. Magaz. Concrete Res., 52, 251–263.
EFNARC. 2006. “Specification and guidelines for testing of passive fire protection for concrete tunnels linings”. European Federation of National Associations Representing Concrete, pp. 1-27.
Felicetti, R., Lo Monte, F. and Pimienta, P. 2017. “A new test method to study the influence of pore pressure on fracture behaviour of concrete during heating”. Cement Concrete Res., 94: 13-23.
Haack, A. 1998. “Fire protection in traffic tunnels: General aspects and results of the EUREKA project” . Tunn. Underg. Sp. Tech., 13(4): 377-381.
Hager, I. 2013. “Behaviour of cement concrete at high temperature”. Bull. Pol. Acad. Sci. (Tech. Sci.), 61(1): 1-10.
Harmathy, T. Z. 1993. “Fire safety design and concrete”. Concrete Design and Construction Series, Longman Scientific and Technical.
Ibrahim, R. Kh., Hamid, R. and Taha, R. A. 2012. “Fire resistance of high-volume fly ash mortars with nanosilica addition”. Constr. Build. Mater., 36: 779-786.
Ingason, H., Li, Y. Z. and Lönnermark, A. 2015. “Tunnel fire dynamics”. Springer, N. Y.
Kalifa, P., Menneteau, F. and Quenard, D. 2000. “Spalling and pore pressure in HPC at high temperatures”. Cement Concrete Res., 30: 1915-1927.
Kalifa, P., Che´ne´, G. and Galle´, C. 2001. “High-temperature behaviour of HPC with polypropylene fibres from spalling to microstructure”. Cement Concrete Res., 31: 1487-1499.
Kaundinya, I. 2007. “Protection of road tunnel linings in cases of fire”. Proceedings of the FEHRL/FERSI/ECTRI Young Researchers Seminar, Brno, Czech Republic, pp. 1-9.
Khan, M. I. 2002. “Factors affecting the thermal properties of concrete and applicability of its prediction models”. Build. Environ., 37: 607-614.
Khan, M. I. and Lynsdale, C. J. 2002. “Strength, permeability, and carbonation of high-performance concrete”. Cement Concrete Res., 32: 123-131.
Khan, M. I., Lynsdale, C. J. and Waldron, P. 2000. “Porosity and strength of PFA/SF/OPC ternary blended paste”. Cement Concrete Res., 30(8): 1225-1229.
Khoury, G. A. 2000. “Effect of fire on concrete and concrete structures”,. Prog. Struct. Eng. Mater., 2(4): 429-447.
Kim, J. H. J., Lim, Y. M., Won, J. P. and Park, H. G. 2010. “Fire resistant behavior of newly developed bottom-ash-based cementitious coating applied concrete tunnel lining under RABT fire loading”. Constr. Build. Mater., 24: 1984-1994.
Kollek, J. 1989. “The determination of the permeability of concrete to oxygen by the Cembureau method, a recommendation”. Mater. Struct, 22: 225-230.
Lee, G., Han, D., Han, M., Han, C. and Son, H. 2012. “Combining polypropylene and nylon fibers to optimize fiber addition for spalling protection of high-strength concrete”. Constr. Build. Mater., 34: 313-320.
Maraveas, C. and Vrakas, A. A. 2014. “Design of concrete tunnel linings for fire safety”. Struct. Eng. Int., 24: 319-329.
Mindeguia, J., Pimienta, P., Carré, H. and La Borderie, C. 2013. “Experimental analysis of concrete spalling due to fire exposure”. Eur. J. Environ. Civ. Eng., 17(6):453-466.
Mohod, M. 2015. “Performance of polypropylene fibre reinforced concrete”. IOSR J. Mech. Civ. Eng., 12(1): 28-36.
Noumowe, A. 2005. “Mechanical properties and microstructure of high strength concrete containing polypropylene fibres exposed to temperatures up to 200 °C”. Cement Concrete Res., 35(11): 2192-2198.
Online Site: www.promat-tunnel.com/en/advices/fire-protection/fire curves.
Pimienta, P., Moreau, B. and Larive, C. 2014. “On site risk assessment of concrete spalling in tunnel by means of a mobile oil-fired furnace”. Proceedings of the 6th International Symposium on Tunnel Safety and Security, March 12-14, Marseille, France, pp. 523-532.
Radzi, N. A. M., Roszilah, H. and Mutalib, A. A. 2016. “A review of methods, issues and challenges of small-scale fire testing of tunnel lining concrete”. J. Appl. Sci., 16: 293-301.
Saadun, A., Mutalib, A. H. R. and Mussa, M. H. 2016. “Behaviour of polypropylene fiber reinforced concrete under dynamic impact load”. J. Eng. Sci. Technol., 11(5): 684-693.
Suhaendi, S. L. and Horiguchi, T. 2006. “Effect of short fibers on residual permeability and mechanical properties of hybrid fibre reinforced high strength concrete after heat exposition”. Cement Concrete Res., 36(9): 1672-1678.
Thakre, N., Rajput, H., Saxena, J. and Mitangale, H. 2014. “Comparative study on strength and permeability of pervious concrete by using nylon and polypropylene fiber”. Int. J Comput. Tech., 1(4): 141-148.
Vermeer, M., Noordijk, L. M. and Blom, C. B. M. 2014. “Mobile furnace for determining fire resistance of existing concrete structures”. Proceedings of the World Tunnel Congress, May 9-14, Sao Paulo, Brazil.
Xiao, J. and Konig, G. 2004. “Study on concrete at high temperature in China- An overview”. Fire Safety J., 39: 89-103.
Yan, Z. G., Zhu, H. H. and Ju, J. W. 2013. “Behavior of reinforced concrete and steel fiber reinforced concrete shield TBM tunnel linings exposed to high temperatures”. Constr. Build. Mater., 38: 610-618.
Yasuda, F., Ono, K. and Otsuka, T. 2004. “Fire protection for TBM shield tunnel lining”. Tunn. Underg. Sp. Tech., 19(4-5): 317.
Zeiml, M., Leithner, D., Lackner, R. and Manh, H. A. 2006. “How do polypropylene fibers improve the spalling behavior of in-sit uconcrete”. Cement Concrete Res., 36: 929-942.
Zlatanic, S. 2014. “Emerging best practices in tunnel liner design can save lives, preserve structural integrity”. Tunnel Business Magazine (TBM), Approach to Tunnel Design for Fire Loads, Oct. 23. | ||
|
آمار تعداد مشاهده مقاله: 988 تعداد دریافت فایل اصل مقاله: 532 |
||