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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Research Report - Engineering Science Mekanika Jurnal Teknik Sipil Journal of the Civil Engineering Forum Jurnal Aplikasi Teknik Sipil APPLIED RESEARCH ON CIVIL ENGINEERING AND ENVIRONMENT (ARCEE)
Paulus Karta Wijaya
Jurusan Teknik Sipil, Fakultas Teknik Universitas Katolik Parahyangan, Bandung
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Materials Science & Nanotechnology Transportation

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Studi Numerikal Tekuk Web pada Balok Baja Kastela akibat Kombinasi Momen Lentur dan Gaya Geser William Wiranata; Paulus Karta Wijaya
Jurnal Aplikasi Teknik Sipil Vol 19, No 3 (2021)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1970.285 KB) | DOI: 10.12962/j2579-891X.v19i3.9249

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.
The Collapse Analysis of the Lateral-Torsional Buckling of I-Shaped Stepped Steel Beams Kelsen Trista Kweenisky; Naomi Pratiwi; Paulus Karta Wijaya
Journal of the Civil Engineering Forum Vol. 6 No. 3 (September 2020)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.56934

Abstract

The use of a non-prismatic member such as a stepped beam as a design method has the ability to function as a tool for steel beams optimization. A cover plate is partially welded on the upper and lower flange of the member at the maximum bending moment location to increase its flexural strength and, under critical load, flexural members bend about its strong axis, displace to the lateral direction, and twist coincidentally through a phenomenon known as the Lateral-Torsional Buckling (LTB). There is, however, no equations in the AISC 360-16 specification to calculate the critical moment of a stepped beam (Mst). Therefore, this research focuses on developing Mst for a simply supported stepped beam which deforms on its shear center under static-transverse loading through the use of a collapse analysis and the behavior of the beam. The results showed the welded cover plates consequently increased the LTB resistance of the prismatic I-shaped steel beam from 9.8% to 202% while the critical moment increased more significantly with an increment in the ratio of the cover plate length to the unbraced length (α). The cover plate thickness was observed to have dominantly affected only a large α ratio while the post-buckling characteristic of large α showed a sudden collapse phenomenon. Furthermore, the LTB modification factor was generated in this study due to the initial geometrical imperfection from the first mode of Eigen shape with maximum amplitude Lb/2000 (Cb1) and stepped beam shape (Cst) which were required to estimate the critical moment of a stepped beam based on the AISC equation for a prismatic beam.
Inelastic Behavior of Steel X-Bracings with Back-To-Back Channel Sections: A Numerical Study Tjahjanto, Helmy Hermawan; Livana, Jazlyn; Wisena, Perceka; Wijaya, Paulus Karta
Applied Research on Civil Engineering and Environment (ARCEE) Vol. 5 No. 02 (2024)
Publisher : POLITEKNIK NEGERI JAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/arcee.v5i02.7120

Abstract

There are two approaches in determining compression capacity of braces in X-bracing type of concentrically braced frames (CBFs) where the compression braces are connected and interacted with the tension braces. One approach is assuming the effective length factor, K, of the braces to be taken as 0.5, while the other approaches suggest more conservative K values and indicate that the compression braces behavior might be affected by the tension braces and connection plates stiffness. Finite element analyses using ABAQUS are conducted evaluate the nonlinear behavior of X-bracings with back-to-back channel sections with varied slenderness ratio and gusset plates flexural stiffness. From the analytical results, it is found that in all evaluated configurations, yielding in tension braces occurs before buckling of compression braces. Although behave inelastically, the tension braces could act as partial restraints for the compression braces at the intersection points, resulting symmetrical buckling shapes when the compression braces reach their axial capacity. Equivalent effective length factors, which are determined from back calculations based on AISC360-22 formulations for compression members, are ranged from 0.36 to 0.46 and from 0.70 to 0.82, for braces with higher and lower slenderness ratios, respectively. Yielding of gusset plates indicates that the corresponding brace lengths should be measured between the designated fold lines. Gusset plates flexural stiffness could also contribute to the compression capacity of the braces.
Co-Authors A. Rusli Benny Suprapto Brotosiswojo Helmi Hermawan Helmy Hermawan Tjahjanto Kelsen Trista Kweenisky Kwani, Sandhi Livana, Jazlyn Paulina Jacintha Paulina Jacintha, Paulina Sandhi Kwani Victor Victor William Wiranata Wisena, Perceka Yosep, Flosten