Studi Numerikal Tekuk Web pada Balok Baja Kastela akibat Kombinasi Momen Lentur dan Gaya Geser

William Wiranata, Paulus Karta Wijaya

Abstract


Abstrak Indonesia:

Salah satu ragam tekuk yang terjadi pada balok baja kastela adalah tekuk pada web penampang. Dalam penelitian ini, analisis dilakukan untuk mencari besarnya beban ultimit yang dapat dipikul balok untuk ragam kegagalan tekuk web. Tekuk web yang dimaksud adalah tekuk pos web (bagian web yang terletak di antara bukaan web). Tekuk pos web menurut AISC Design Guide 31 pasal 3.4.1 tidak meninjau kestabilan web secara keseluruhan tetapi meninjau stabilitas pelat T-web atas dan bawah secara terpisah berdasarkan momen kritis dari bagian atas atau bawah web. Pada studi ini, dilakukan analisis tekuk web balok kastela sebagai satu kesatuan. Model yang ditinjau adalah balok kastela yang terletak di atas dua tumpuan sederhana dengan berbagai ukuran panjang. Beban yang diberikan adalah beban terpusat di tengah bentang dengan maksud untuk menciptakan gaya geser konstan dan momen lentur bervariasi di sepanjang balok. Dari analisis tersebut diperoleh persamaan untuk memprediksi gaya geser kritis dengan parameter h/tw, ketidaksempurnaan geometri, dan momen lentur untuk berbagai profil balok kastela.

Abstrak Inggris:

One of many buckling mode that could occur on castellated steel beam is web buckling. In this research, the analysis is carried out by looking for ultimate load that the beam can carry for web buckling mode of failure. Web buckling is referred to web post (part of web that located between two holes) buckling. Web post buckling according to AISC Design Guide 31 chapter 3.4.1 is not reviewed of the stability of web as a whole but reviewed the stability of top and bottom of T-web separately based on critical moment from upper part and lower part of the web. In this study, the analysis of web post buckling as one part of web has been studied. The model is simply supported castellated beam that is loaded by concentrated load applied at mid-span with various beam length that intended to create constant shear force and bending moment along the beam. From the analysis, equation have been obtained to estimate the shear force of castellated beam with h/tw ratio, geometry imperfection, and bending moment for various of castellated beams.


Keywords


Analisis tekuk web; balok kastela; gaya geser; rasio h/tw; ketidaksempurnaan geometri; momen lentur

Full Text:

PDF

References


M. R. Wakchaure and A. V. Sagade, “Finite Element Analysis of Castellated Steel Beam,” International Journal of Engineering and Innovative Technology (IJEIT), vol.2, no. 1, p. 365 – 372, 2012.

ENV 1993-1-1 (2005) Eurocode 3, “Design of Steel Structures-Part 1-1: General Rules and Rules for Buildings. Amendment A2 of Eurocode 3: Annex N Opening in Webs.” British Standards Institution, 2011.

M. R. Soltani, A. Bouchair, and M. Mimoune, “Nonlinear FE Analysis of the Ultimate Behavior of Steel Castellated Beams,” Journal of Constructional Steel Research, vol. 70, p. 101 – 114, 2012.

H. Deng, W. L. Pu, T. L. Li, and D. Chen, “Analysis on Behavior of Web Buckling of Hexagonal Castellated Beams with Transverse Stiffeners Under Uniform Loads,” 5th International Conference on Civil Engineering and Transportation (ICCET), p. 380 – 384, 2015.

P. Pourbehi and A. Pirmoz, “Shear Response of Castellated Steel Beams,” International Journal of Steel Structures, vol. 15, no. 2, p. 389 – 399, 2015.

F. Menkulasi, C. D. Moen, M. R. Eatherton, and D. Kuruppuarachchi, “Investigation of Web Post Compression Buckling Limit State and Stiffener Requirements in Castellated Beams,” Engineering Journal, AISC, First Quarter 2017, vol. 54, no. 1, p. 21 – 43, 2017.

W. Ji, L. Jia, Y. Wang, and C. Chen, “Experimental Study of Local Buckling of Castellated Steel Beams Under Pure Bending,” IOP Conference Series: Material Science and Engineering, vol. 392, no. 2, p. 1 – 6, 2018.

American Institute of Steel Construction (AISC), “Steel Design Guide 31 – Castellated and Cellular Beam Design.” Lawrence, Kansas, 2016.

American Institute of Steel Construction (AISC), “Specification for Structural Steel Buildings (AISC 360-16).” Chicago, Illinois, 2016.




DOI: http://dx.doi.org/10.12962/j2579-891X.v19i3.9249

Refbacks

  • There are currently no refbacks.


Jumlah Kunjungan:Web Analytics

Creative Commons License
Jurnal Aplikasi Teknik Sipil by Pusat Publikasi Ilmiah LPPM Institut Teknologi Sepuluh Nopember is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License

Based on work at https://iptek.its.ac.id/index.php/jats