Investigation of Box Sections with Heading Plates Under the Effect of Flexural and Axial Force

Abstract

Ductility needs to be ensured in the building system, from connection design to overall structure design. For the RHS profiles that are commonly used in general, the sudden loss of capacity and brittle fractures that occur under the influence of internal forces may cause irreversible damage. For this reason, the design of structural elements should be made with the consideration of the possible buckling conditions. In this study, RHS profiles are strengthened with endplates in order to prevent local buckling. The effects of this reinforcement on local buckling and carrying capacity of welded joints in RHS profiles under the influence of axial force are examined. Analyzes are made numerically under the influence of cyclic static incremental loads. It has been observed that the strengthening technique with the endplate gives effective results when possible fractures in the weld seam are prevented.

Keywords

• RHS Beams-Columns
• End Plate Connections
• Welded Moment Resisting Connections
• Moment Resisting Frame Systems

Eğilme ve Eksenel Kuvvet Etkisindeki Başlık Levhalı Kutu Kesitlerin İncelenmesi

Öz

Yapı sistemi üzerinde birleşim tasarımından genel yapı tasarımına dek, süneklik özelliklerinin sağlanması gerekir. Ülkemizde yaygın olarak tercih edilen kutu kesitli profillerin iç kuvvetler tesiri altında oluşan ani kapasitelerin kayıplarına ve gevrek kırılmalarına yol açarak telafi edilemez hasarlara neden olabilir. Bu nedenle yapı elemanlarının tasarımlarında gerçekleşebilecek burkulma durumunun dikkate alınarak tasarımları yapılmalıdır. Yapılan bu çalışmada, kutu profillerin lokal burkulmalarının önlenmesi amacıyla başlık levhalarıyla güçlendirilmiştir. Bu güçlendirmenin eksenel kuvvet etkisi altındaki kutu kesitli profillerde kaynaklı birleşim lokal burkulmaları ve taşıma kapasitesi üzerindeki etkileri incelenmiştir. Analizler, tersinir statik artımsal yükler etkisinde sayısal olarak yapılmıştır. Kaynak dikişinde meydana gelmesi olası yırtılmalar önlendiğinde başlık levhasıyla güçlendirme tekniğinin etkili sonuçlar verdiği görülmüştür.

Anahtar Kelimeler

• Kutu Kesitli Kiriş-Kolonlar
• Alın Levhalı Birleşim
• Kaynaklı Moment Aktaran Birleşim
• Moment Aktaran Çerçeve Sistemler

Kaynakça

1. Berman, W.J., Bruneau, M. (2007). Experimental and analytical investigation of tubular links for eccentrically braced frames, Engineering Structures, 29(8), 1929-1938. https://doi.org/10.1016/j.engstruct.2006.10.012
2. Chao, S-H., Goel, S.C. (2006). Performance-based design of eccentrically braced frames using target drift and yield mechanism as performance criteria, Engineering Journal, 43(4), 173-199. https://doi.org/10.62913/engj.v43i4.893
3. Chopra, A.K., Goel R.K. (1999). Capacity–Demand–Diagram methods for estimating seismic deformation of inelastic structures, Earthquake Spectra, 15(4), 637-656. https://doi.org/10.1193/1.1586065
4. Dicleli, M., Mehta, A. (2007). Simulation of inelastic cyclic buckling behavior of steel box sections, Computers & Structures, 85(7-8), 446-457. https://doi.org/10.1016/j.compstruc.2006.09.010
5. Foutch, D.A., Yun, S.Y. (2002). Modeling of steel moment frames for seismic loads, Journal of Constructional Steel Research, 58(5-8), 529-564. https://doi.org/10.1016/S0143-974X(01)00078-5
6. Gioncu, V. (2000). Framed structures. ductility and seismic response general report, Journal of Constructional Steel Research, 55(1-3), 125-154. https://doi.org/10.1016/S0143-974X(99)00081-4
7. Gioncu, V., Mazzolani, F. (2002). Ductility of seismic resistant steel structures, Spon press, Biddles ltd., 694s. USA and Canada.
8. Jian, W., Guang, T.W. (2022). Experimental seismic behavior of RHS column-to-I beam connection with additional plates, Iranian Journal of Science and Technology, 46(3), 2053-2065. https://doi.org/10.1007/s40996-021-00770-0

9. Mahin, S., Malley, J., Hamburger, R., (2002). Overwiev of the Fema/Sac program for reduction of earthquake hazards in steel moment frame structures, Journal of Constructional Steel Research, 58(5-8), 511-528. https://doi.org/10.1016/S0143-974X(01)00088-8
10. Mashiri, F.R., Zhao, X.L. (2004). Plastic mechanism analysis of welded thin-walled T-joints made up of circular braces and square chords under in-plane bending, Thin-Walled Structures, 42(5), 759–783. https://doi.org/10.1016/j.tws.2003.12.010
11. Mashiri, F.R., Zhao, X.L. (2010). Square hollow section (SHS) T-joints with concrete-filled chords subjected to in-plane fatigue loading in the brace, Thin-Walled Structures, 48(2), 150–158. https://doi.org/10.1016/j.tws.2009.07.010
12. Nakashima, M., Matsumiya, T., Liu, D., Suita, K., Liu, D. (2005). Test on full-scale three-storey steel moment frame and assessment of ability of numerical simulation to trace cyclic inelastic behaviour, Earthquake Engineering & Structural Dynamics 35(1), 3-19. https://doi.org/10.1002/eqe.528
13. Yun, S.-Y., Hamburger, R.O., Cornell, C.A., Foutch, D.A., (2002). Seismic performance evaluation for steel moment frames, Journal of Structural Engineering, 128(4), 534-54. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:4(534)
14. Zhao, B., Liu, C., Lin, S. (2024). Comparison of in-plane flexural seismic behavior between traditional RHS X-joints and eccentric RHS X-joints. In Structures 60, 105835. https://doi.org/10.1016/j.istruc.2023.105835
15. Zhao, X.L. (2000). Deformation limit and ultimate strength of welded T-joints in cold-formed rhs sections, Journal of Constructional Steel Research, 53(2). 149–165. https://doi.org/10.1016/S0143-974X(99)00063-2