Analisis Numerik Link Panjang dengan Penambahan Pelat Sayap Tepi terhadap Peningkatan Kinerja Struktur Rangka Baja Berpengaku Eksentrik

Musbar Musbar, Bambang Budiono, Herlien D. Setio, Dyah Kusumastuti

Abstract


Abstrak. Mengantisipasi kerusakan bangunan akibat gaya gempa, banyak model konstruksi bangunan yang terus dikembangkan dan diteliti hingga sekarang, salah satunya struktur bangunan rangka baja berpengaku eksentrik yang menggunakan elemen link sebagai bagian elemen struktur yang berfungsi untuk menyerap energi gempa. Kegagalan pada link panjang yang lebih dominan disebabkan oleh momen menyebabkan terjadinya kegagalan yang lebih awal akibat fraktur dan tekuk pada zona di ujung – ujung link terutama pada sayap. Untuk mengatasi kegagalan awal yang lebih cepat, maka dilakukan inovasi dengan menambah pengaku sayap pada tepi link. Penambahan pelat pengaku sayap tepi pada link panjang mempunyai beberapa keuntungan diantaranya; kemudahan dalam pengerjaan dan pengelasan yang minimal sehingga mengurangi pengaruh tegangan sisa akibat proses pengelasan. Penelitian ini mengkaji secara numerik dengan menggunakan perangkat lunak MSC Nastran/Patran terhadap kinerja link panjang untuk beberapa variasi model link yang dianalisis. Parameter yang dianalisis meliputi variasi yaitu: panjang link, penambahan pelat sayap tepi beserta konfigurasi pemodelannya, tebal pelat dan kombinasi dengan pengaku badan vertikal. Hasil analisis pada model modifikasi penambahan pelat pengaku tepi dapat meningkatkan kinerja link panjang dibandingkan dengan model link standar pada variabel : daktilitas, kekuatan, disipasi energi dan kekakuan.

Abstract. Conducting research in anticipating earthquake damage at building has been developed continuosly. One of it is Eccentrically Braced Frame (EBF) for steel frame. EBF uses link element to absorb earthquake energy. Failure at long type link dominantly is caused by moment which make early failure because of fracture and buckling at the end of link such as in its flange. To tackle the early failure, stiffener at the end of the link has been added. The advantages of it are making easy of workmanship and minimizing the welding effort which can reduce residual stress because of welding process. This study does numerical study by using MSC Nastran/Patran program to measure the performance of long type link for several analysis types. Several parameters have been analyzed such as the length of the link, the edge addition of flange plate with its modeling configuration, the width of the plate, and the combination with vertical body stiffener. This study found that the addition of stiffener at the end of the link has increased the performance of long type link. Finally, the findings of this study are compared with that of standard link model. The variables that are compared between both of long type link and standard link are ductility, strength, energy dissipation and stiffness.

Keywords


Kinerja; Modifikasi; Konfigurasi; Model.

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References


American Institute of Steel Construction 341-2010, Seismic Provision for Stuctural Steel Building, AISC, Inc.

American Institute of Steel Construction 341-2005, Seismic Provision for Stuctural Steel Building, AISC, Inc.

American Institute of Steel Construction 341-2002, Seismic Provision for structural Steel Building, AISC, Inc.

Arce, G., 2002, Impact of Higher Strength Steels on Local Buckling and Over Strength of Links in Eccentrically Braced Frames, MS Thesis, USA: Univ. of Texas at Austin.

Bruneau, M., Uang, C.M., Sabeli, R., 2011, Ductile Design of Steel Structure, McGraw-Hill.

Daneshmand, A., Hashemi, B.H., 2012, Performance of Intermediate and Long links in eccentrically Braced Frames, Journal of Constructional Steel Research : Vol. 70 : 167-176.

Danesh, F., Shakerpoor, B., 2012, Behavior of Braced Moment Frame with Modified Link, 15 WCEE, Lisboa.

Engelhardt, M.D., Popov, E.P., 1992, Experimental Performance of Long Link in Eccentrically Braced Frames, Journal of Structural Engineering, Vol.118, No.11:3067-3088, November, ASCE.

Ghobarah, A., Ramadan, T., 1990, Effect of Axial Forces on the Performance of Link in Eccentrically Braced Frames, Eng. Struct. Vol.12.

Ghobarah, A., Ramadan, T., 1991, Seismic Analysis of Links of Various Lengths in Eccentrically Braced Frames, Can. Journal of Civ. Eng. 140-148.

Hjelmstad, K.D., Popov, E.P., 1984, Characteristics of Eccentrically Braced Frames, Journal of Structural Engineering, ASCE.

Kasai, K., dan Popov, E.P., 1986b, General Behavior of WF Steel Shear Link Beams, Journal of Structural Engineering, ASCE, Vol. 112, No.2, 362-382.

Mohebkhah, A., Chegeni, B., 2014, Overstrength and Rotation Capacity for EBF Links Made of European IPE Section, Thin-Walled Structured, Vol. 74, 255-260.

Moestopo, M., Mirza, A., 2006, Kinerja Sambungan Baut pada Link struktur Rangka Baja Eksentrik, Seminar dan Pameran HAKI, Agustus.

Nidiasari, Budiono, B., 2010, Kajian Numerik Perilaku Link Panjang dengan Pengaku Diagonal Badan pada Sistem Rangka Baja Berpengaku Eksensentris, Seminar dan Pameran HAKI.

Okazaki, T., 2004, Seismic Performance of Link-to-Column Connection in Steel EBF, Dissertation Doctor of Philosophy, USA: The University of Texas at Austin.

Okazaki, T., Arce, G., Ryu, H.C., Engelhardt, M.D., 2005, Experimental Study of Local Buckling, Overstrength, and Fracture of Links in Eccentrically Braced Frames, Journal of Structural Engineering, ASCE.

Okazaki, T., Engelhardt, M.D., 2006, Finite Element Simulation of Link-to-Column Connection in Steel Eccentrically Braced Frames, Proceeding of the 8th U.S. National Converence on Eartquake Engineering, San Fransisco, California, USA., April 18-22, paper No.1526.

Okazaki, T., Engelhardt, M.D., Drolias, A., Shell, E., Hong, J.K., Uang, C.M., 2009, Experimental Investigation of Link-to-Column Connections in Eccentrically Braced Frames, Journal of

Constructional Steel Research, Vol. 65, 1401-1412.

Ozhendekci, D., Ozhendekci, N., 2008, Effects of the Frame Geometry on the Weight and Inelastic behaviour of Eccentrically Braced Chevron Steel Frames, Journal of Constructional Steel

Research, Vol 64., pp. 326-343.

Popov, E.P., Engelhardt, M.D., 1988, Seismic Eccentrically Braced Frame, J. Construct. Steel Research, Vol. 10, 321-354.

Richards, P.W., Uang, C.M., 2004, Development of Testing Protocol for Links in Eccentrically Braced Frame, 13th World Conference on Earthquake Engineering, Vancouver, B.C., Canada, August 1-6, Paper No. 2795.

Richards, P.W., Uang, C.M., 2005, Effect of Flange Width-Thickness ratio on Eccentrically Braced Frames Link Cyclic Rotation Capacity, Journal of Structural Engineering, ASCE, Vol. 131, 1546-1552.

Richards, P.W., Uang, C.M., 2006, Testing Protocol for Short Link in Eccentrically Braced Frames, J. Struct. Eng. 132:1183-1191.

SNI 03-1729-2002, Tata Cara Perencanaan Struktur Baja Untuk Bangunan Gedung.

Yurisman, Budiono, B., Mustopo, M., Suarjana, M., 2010, Numerical Study of Performance Shear Link with Web Diagonal Stiffeners in Eccentrically Braced Frame (in Indonesia), Journal of Civil Engineering ITB, Vol. 17 No.1 April 2010, Civil Engineering Program ITB.

Yurisman, Budiono, B., Mustopo, M., Suarjana, M., 2010, Behaviour of Shear Link of WF Section with Diagonal Web Stiffeners Braced Frame (EBF) of Steel Structure, ITB Journal of Engineering Science (International Journal) Vol.42 No.2 November 2010, The Institute for Research and Community Service, Institut Teknologi Bandung.




DOI: http://dx.doi.org/10.5614%2Fjts.2015.22.1.1

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