مطالعه آزمایشگاهی رفتار ستون های فولادی پر شده با بتن حاوی براده های آهن

نوع مقاله : علمی - پژوهشی

نویسندگان

1 استادیار مهندسی عمران-سازه، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 فارغ‌التحصیل کارشناسی ارشد مهندسی عمران-سازه، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

براده آهن از جمله ضایعات صنعتی می باشد که اثرات مضر بر محیط زیست دارد. به منظور کاهش اثرات منفی این ضایعات، می توان از آنها در ساخت بتن حاوی براده آهن به عنوان جایگزین بخشی یا تمام ماسه استفاده نمود. در این پژوهش عملکرد فشاری ستون های فولادی پرشده با بتن (CFST) با مقطع دایره ای، مورد بررسی قرار گرفته است. بتن مورد استفاده در داخل ستون‌ها، حاوی براده آهن به مقدار 0، 10، 20 و 30 درصد وزنی ماسه با دو نسبت مختلف آب به سیمان، در نظر گرفته شده است. نمونه‌های ستون CFST پس از ساخت و عمل‌آوری 28 روزه، تحت اثر بار محوری فشاری قرار گرفته و نتایج به صورت منحنی‌های بار-تغییرمکان و ظرفیت باربری نمونه‌ها بدست آمده‌اند. پارامترهای مورد مطالعه در این تحقیق نسبت قطر به ضخامت فولاد محصور کننده، نسبت آب به سیمان (طرح اختلاط) و‌ درصدهای مختلف براده آهن جایگزین ماسه می‌باشد که تاثیر هر کدام بر مقاومت فشاری نمونه‌های CFST بررسی شده است. به منظور برآورد مقاومت فشاری بتن، نمونه‌های مکعبی بتن نیز تهیه شده و آزمایش مقاومت فشاری 28 روزه انجام شده است. نتایج به صورت مقاومت فشاری نمونه‌های مکعبی بتن و منحنی‌های تنش-کرنش بتن، استخراج شده و تاثیر نسبت آب به سیمان (طرح اختلاط) و درصد براده آهن بر مقاومت فشاری نمونه‌های مکعبی بتن و همچنین کارایی آن، مورد مطالعه قرار گرفته است. نتایج بدست آمده نشان می‌دهد که افزودن براده آهن به مقدار 20 درصد وزنی ماسه، مقاومت فشاری بتن و ستون‌های CFST را تا حد قابل قبولی افزایش می‌دهد. این مسئله همچنین افزایش سختی اولیه نمونه‌ها را در پی دارد. افزایش مقدار براده آهن از مقدار 20 درصد به 30 درصد وزنی ماسه، باعث کاهش مقاومت فشاری نمونه‌ها می‌شود، که بر این اساس می‌توان نتیجه گرفت درصد بهینه برای مقدار براده آهن، 20 درصد می‌باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental study on the behavior of steel tubular columns filled with concrete containing iron filings

نویسندگان [English]

  • Shirin Esmaeili Niari 1
  • Saeid Yaghoubi 2
  • Vahid Akrami 1
1 Asisitant Professor of structural engineering, Faculty of engineering, University of Mohaghegh Ardabili, Ardabil, Iran
2 Master graduate of structural engineering, Faculty of engineering, University of Mohaghegh Ardabili, Ardabil, Iran
چکیده [English]

Iron filings are industrial by-products that have harmful effects on the environment. To handle this issue, iron filings can be used in concrete production as a substitute for part or all of the sand. This study investigates, the compressive performance of concrete-filled steel tubular columns (CFST) with a circular cross section. The concrete used inside the CFST columns contained 0, 10, 20 and 30% iron filings as replacement of sand with two different water to cement ratios. After fabrication and curing for 28 days, CFST columns, were subjected to compressive axial load and the results were obtained as load-displacement curves and load-bearing capacity of the specimens. The parameters studied in this research include diameter to thickness ratio of steel tubes, water to cement ratio (mixing plan) and different percentages of iron filings as replacement of sand. In order to estimate the compressive strength of concrete, standard cube specimens were prepared and their 28-day compressive strength was measured. The results were extracted as compressive strength of concrete cube samples and stress-strain curves. Also, the effect of water to cement ratio (mixing plan) and percentage of iron filings on the compressive strength and efficiency of concrete cube samples, has been studied. The results show that the addition of iron filings up to 20% of the sand weight increases the compressive strength of concrete and CFST columns to an acceptable level. This also increases the initial stiffness of the samples. Increasing the amount of iron filings from 20% to 30% of the sand weight, showed a decrease in compressive strength of the specimens, according to which it can be concluded that the optimal percentage for the amount of iron filings is 20%.

کلیدواژه‌ها [English]

  • Experimental Study
  • Axial Compressive strength
  • CFST column
  • Iron Filings
  • D/t ratio
[1] Jabar Hussain, A., Al-Khafaji, Z. S.  (2021). Experimental investigation on applying waste iron filings in the engineering fields for protection the environment from contamination. Materials Today: Proceedings, online, DOI: https://doi.org/10.1016/j.matpr.2021.09.039.
[2] Olawale, S. O., Kareem, M. A., Muritala, H. T., Adebanjo, A. U., Alabi, O. O., Olawuyi, O. A., Fadipe, O. O.  (2021). Utilization of Iron Filings as Partial Replacements for Sand in Self-Compacting Concrete. Tanzania Journal of Science, 47(3): 906-916.
[3] Garg, H. (2022). Durability of concrete made with steel filings as a replacement of fine aggregate. Materials Today: Proceedings, 49(8): 3217-3221.
[4] Prakash, S., Helmand, P., Saini, S. (2019). "Mechanical properties of concrete in presence of Iron filings as complete replacement of fine aggregates." Materials Today: Proceedings, 15(3): 536-545.
[5] Alsaad, A. J., Radhi, M. S., Taher, M. J. (2019). Eco-friendly utilizing of iron filings in production reactive powder concrete. IOP Conference Series: Materials Science and Engineering, 518(2): 022051.
[6] Alserai, S. J., Alsaraj, W. K., Abass, Z. W. (2018). Effect of iron filings on the mechanical properties of different types of sustainable concrete. The Open Civil Engineering Journal, 12(1): 441-457.
[7] Barghlame, H., Ferdousi, A., Mousavi Ghasemi, S. A.  (2021). Investigation into the behavior of a upgraded section used for Concrete-Filled Steel tubular Columns (Upgraded CFT) Under Cyclic Loading. Journal of Structural and Construction Engineering, online, DOI: https://doi.org/10.22065/jsce.2021.309337.2601.
[8] Shi, Q., Ying, Y. , Wang, B. (2021). Experimental investigation on the seismic performance of concrete-filled steel tubular joints in diagrid structures. Structures, 31: 230-247.
[9] Aghamaleki, S. T., Naghipour, M., Vaseghi Amiri, J., Nematzadeh, M. (2021). Experimental and numerical study on double skin steel tube filled with concrete using supporting vector machines and tree decision model. Journal of Structural and Construction Engineering, online, DOI: https://doi.org/10.22065/jsce.2021.301313.2546.
[10] Naghipour, M., Mahdavi, S., Maedeh, S., Ebrahimzadeh, S. M. (2021). Numerical analysis of concrete-filled double skin tubular slender columns with internal circular and external hexagonal tubes. Journal of Structural and Construction Engineering, 8(2): 56-69.
[11] Ehsani, r., Zibaei Aliabad, r. (2021). Numerical study of progressive failure mechanism in steel frames with CFST columns. Journal of Structural and Construction Engineering: online, DOI: https://doi.org/10.22065/jsce.2021.265113.2321.
[12] Kolmi Zadeh, V., Saberi, H., Mokhtari, A., Saberi, V. (2021). Investigating the Effect of Concrete Compressive Strength on Axial Performance of Double-Edged Steel Columns Filled with Concrete. Journal of Structural and Construction Engineering, 8(4), 106-123. doi: https://doi.org/10.22065/jsce.2019.192744.1895.
[13] Gholizad, A., Shiri, B., Makkiabadi, M. S. (2015). Hollow Ratio and Stiffeners Effects Concrete Filled Double Steel Tubes Behaviour. Journal of Structural and Construction Engineering, 2(3): 34-47.
[14] Mhawi, A. L., Dawood, A. O. (2020). Experimental investigation of some properties of square concrete-filled steel tubular columns containing iron filings as replacement of sand. IOP Conference Series: Materials Science and Engineering, 888(1): 012045.
[15] John, A. T., Orumu, S. T., Nelson, T. A. (2019). The Effect of the Presence of Ferric Iron in Water used for the Production of Concrete on Its Compressive Strength. European Journal of Engineering and Technology Research, 4(8), 95-98.
[16] Khalily, M., Saberi, V., Saberi, H., Mansouri, V., Sadeghi, A., Pachideh, G. (2022). An Experimental Study on the Effect of High Temperatures on Performance of the Plastic Lightweight Concrete Containing Steel, Polypropylene and Glass Fibers. Journal of Structural and Construction Engineering, 8(12).
[17] Ruidong, W., Yu, S., Juanhong, L., Linian, C., Guangtian, Z., Yueyue, Z. (2021). Effect of iron tailings and slag powders on workability and mechanical properties of concrete. Frontiers in Materials, 8, 258.
[18] Nadi, S., Beheshti Nezhad, H., Sadeghi, A. (2022). Experimental study on the durability and mechanical properties of concrete with crumb rubber. Journal of Building Pathology and Rehabilitation, 7(1), 1-12.
[19] Singh, G., Siddique, R. (2016). Strength properties and micro-structural analysis of self-compacting concrete made with iron slag as partial replacement of fine aggregates. Construction and Building Materials, 127: 144-152.
[20] Noori, M., AL-Hashimi, H., Najim, W., Hameed, A. (2018). Performance of Concrete Containing Iron Fillings. Journal of University of Babylon for Engineering Sciences, 26(6): 384-391.
[21] Rajeswari V. (2021). Strength Behaviour of Iron Fillings in Concrete by Partial Replacement of Sand. International Journal of Engineering Research & Technology (IJERT), 10(05): 839-841.
[22] Azevedo, V. D. S., Lima, L. R., Vellasco, P. C. D. S., Tavares, M. E. D. N., Chan, T. M. (2021). Experimental investigation on recycled aggregate concrete filled steel tubular stub columns under axial compression. Journal of Constructional Steel Research, 187: 106930.
[23] Yang Y. F., Hou C. (2015). Behaviour and design calculations of recycled aggregate concrete filled steel tube (RACFST) members. Magazine of Concrete Research, 67(11): 611–20.
[24] Lyu, W. Q., Han, L. H., Hou, C. (2021). Axial compressive behaviour and design calculations on recycled aggregate concrete-filled steel tubular (RAC-FST) stub columns. Engineering Structures, 241: 112452.
[25] Tam V. W., Wang Z. B., Tao Z. (2014). Behaviour of recycled aggregate concrete filled stainless steel stub columns. Materials and Structures, 47(1–2): 293–310.
[26] Wang Y., Chen J., Geng Y. (2015). Testing and analysis of axially loaded normal-strength recycled aggregate concrete filled steel tubular stub columns. Engineering Structures, 86: 192–212.
[27] Chen Z., Xu J., Xue J., Su Y. (2014). Performance and calculations of recycled aggregate concrete-filled steel tubular (RACFST) short columns under axial compression. International Journal of Steel Structures, 14(1): 31–42.
[28]  Nour, A., Mete Güneyisib, E. (2019). Prediction model on compressive strength of recycled aggregate concrete filled steel tube columns. Composites Part B: Engineering, 173: 106938.
[29] Karimi, A., Nematzadeh, M. (2020). Axial compressive performance of steel tube columns filled with steel fiber-reinforced high strength concrete containing tire aggregate after exposure to high temperatures, Engineering Structures, 219: 110608.
[30] Dong, M., Elchalakani, M., Karrech, A., Fahmi Hassanein, M., Xie, T., Yang, B. (2019). Behaviour and design of rubberised concrete filled steel tubes under combined loading conditions, Thin-Walled Structures, 139: 24-38.
[31] Dong, M., Elchalakani, M., Karrech, A., Fawzia, S.,  MohamedAli, M., Yang, B., Xu, SH. (2019). Circular steel tubes filled with rubberised concrete under combined loading. Journal of Constructional Steel Research, 162: 105613.
[32] Chen, J., Zhang, S., Wang, Y., Geng, Y. (2020). Axial compressive behavior of recycled concrete filled steel tubular stub columns with the inclusion of crushed brick. Structures, 26: 271-283.
[33] ASTM, C.39 (2014). Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens. West Conshohocken, PA: ASTM International.
[34] ASTM E4-21 (2021). Standard Practices for Force Calibration and Verification of Testing Machines. West Conshohocken, PA: ASTM International.