English
Русский 35-46 p.
The paper evaluates the strength and fatigue characteristics of reinforced damaged steel beams using composite materials – fiber reinforced polymers (FRP) using an analytical model using the ANSYS program. An approach to design based on the methodology of a constant fatigue schedule is considered; models of five steel beams reinforced with carbon fiber are constructed in the ANSYS program. The model was loaded with a symmetrically located concentrated load until destruction. Fa-tigue crack propagation curves have shown that carbon fiber plates restrain crack growth and increase durability. The results showed that carbon fiber reinforcement of steel beams increases the ultimate load and increases the plasticity of the beam.
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[13] Tusnin A.R., Shchurov E.O. Experimental studies of the adhesive connection of elements made of steel and carbon fiber composite materials. Industrial and civil construction. M., 2017. 7. P. 69 – 73. (rus.)
[14] Tusnin A.R., Shchurov E.O. Theoretical assessment of the bearing capacity of a steel beam reinforced with carbon fiber. Industrial and civil construction. M., 2020. 2. P. 18 – 22. (rus.)
[15] Emelyanov O.V., Zimonin E.A. Regularities of the formation of residual compressive stress-es in the vicinity of the crack tip under alternating cyclic loading. Industrial and civil engi-neering. M., 2010. 3. P. 25 – 27. (rus.)
[16] Bely G.I., Kubasevich A.E. Bearing capacity of crane beams with fatigue cracks in wall. Bulletin of Civil Engineers. SPb, 2022. 2. P. 24 – 29. (rus.)
[17] Bely G.I., Kubasevich A.E. The influence of geometric imperfections of the compressed belt on the bearing capacity of crane beams with fatigue cracks in the wall. Bulletin of Civil En-gineers. SPb, 2022. 3. P. 14 – 20. (rus.)
[18] Kubasevich A.E. Work of crane beams with fatigue cracks in the compressed belt zone. Bul-letin of Civil Engineers. SPb, 2021. 3. P. 64 – 70. (rus.)
[19] Kubasevich A.E. Stability of the walls of crane beams with fatigue cracks in the zone of the compressed belt. Bulletin of Civil Engineers. SPb, 2020. 4. P. 47 – 53. (rus.)
[20] Goritsky V.M. Determination of the cause of accelerated crack growth in the wall of the ver-tical steel tank RVSP-20000. Industrial and civil construction. M., 2010. 5. P. 25 – 28. (rus.)
[2] Saburov V.F. Actual loading and estimated resource estimation of crane beams of industrial buildings. Metal structures. The works of the school of Professor N.S. Streletsky. M.: MSUCE, 2008. P. 187 – 193. (rus.)
[3] Troshchenko V.T. Method of accelerated determination of the fatigue limit of metals. Ap-prox. mechanics. 2013. 3 (5). P. 50 – 54. (rus.)
[4] Matvienko Yu.G. Models and criteria of fracture mechanics M.: Fizmatlit, 2006. 328 s. (rus.)
[5] Kim Y.J. Fatigue behavior of damaged steel beams repaired with CFRP strips. Engineering Structures. 2011. 33 (5). P. 1491 – 1502.
[6] Ghafoori M.E., Motavalli J. Botsis A. Herwig, and M. Galli, Fatigue strengthening of dam-aged metallic beams using prestressed unbonded and bonded CFRP plates. International Journal of Fatigue. 2012. 44. P. 303 – 315.
[7] Kondo Y., Okuya K. The effect of seismic loading on the fatigue strength of welded joints. Materials Science and Engineering A. 2007. 468-470. P. 223 – 229.
[8] Wu G., Wang H., Wu Z., Liu H., Ren Y. Experimental study on the fatigue behavior of steel beams strengthened with different fiber-reinforced composite plates. Journal of Composites for Construction. 2012. 16 (2). P. 127 – 137.
[9] Loher U.B., Mueller R., Leutwiler, Esslinger V. CFRP strengthened aluminum structures. in Proceedings of the 17th International SAMPE Europe Conference on Success of Materials by Combination, Switzerland. Basel, 1996. P. 37 – 54.
[10] Tavakkolizadeh M., Saadatmanesh H. Fatigue strength of steel girders strengthened with carbon fiber reinforced polymer patch. J. Struct. Eng. 2003. 129. P. 186 – 196.
[11] Rizkalla S., Dawood M., Schnerch D. Development of a carbon fiber reinforced polymer system for strengthening steel structures. Compos. Part A Appl. Sci. Manuf. 2008. 39. P. 88 – 397.
[12] Klubberg F., Klopfer I., Broeckmann C., Berchtold R., Beiss P. Fatigue testing of mate-rials and components under mean load conditions. An. Mec. Fract. 2011. 1. P. 419 – 424.
[13] Tusnin A.R., Shchurov E.O. Experimental studies of the adhesive connection of elements made of steel and carbon fiber composite materials. Industrial and civil construction. M., 2017. 7. P. 69 – 73. (rus.)
[14] Tusnin A.R., Shchurov E.O. Theoretical assessment of the bearing capacity of a steel beam reinforced with carbon fiber. Industrial and civil construction. M., 2020. 2. P. 18 – 22. (rus.)
[15] Emelyanov O.V., Zimonin E.A. Regularities of the formation of residual compressive stress-es in the vicinity of the crack tip under alternating cyclic loading. Industrial and civil engi-neering. M., 2010. 3. P. 25 – 27. (rus.)
[16] Bely G.I., Kubasevich A.E. Bearing capacity of crane beams with fatigue cracks in wall. Bulletin of Civil Engineers. SPb, 2022. 2. P. 24 – 29. (rus.)
[17] Bely G.I., Kubasevich A.E. The influence of geometric imperfections of the compressed belt on the bearing capacity of crane beams with fatigue cracks in the wall. Bulletin of Civil En-gineers. SPb, 2022. 3. P. 14 – 20. (rus.)
[18] Kubasevich A.E. Work of crane beams with fatigue cracks in the compressed belt zone. Bul-letin of Civil Engineers. SPb, 2021. 3. P. 64 – 70. (rus.)
[19] Kubasevich A.E. Stability of the walls of crane beams with fatigue cracks in the zone of the compressed belt. Bulletin of Civil Engineers. SPb, 2020. 4. P. 47 – 53. (rus.)
[20] Goritsky V.M. Determination of the cause of accelerated crack growth in the wall of the ver-tical steel tank RVSP-20000. Industrial and civil construction. M., 2010. 5. P. 25 – 28. (rus.)