scholarly journals COMPARATIVE STUDY OF THE BEHAVIOUR OF BUILDING STRUCTURE OF HOTEL DAFAM LOTUS JEMBER BY USING MOMENT RESISTING FRAME AND ECCENTRICALLY BRACED FRAME

2018 ◽  
Vol 2 (01) ◽  
pp. 13
Author(s):  
Reza Kurniawan ◽  
Dwi Nurtanto ◽  
Gati Annisa Hayu
Keyword(s):  
Axial Force ◽  
Shear Force ◽  
Steel Structure ◽  
System Structure ◽  
Braced Frame ◽  
Eccentrically Braced Frame ◽  
Moment Resisting Frame ◽  
Concentrically Braced Frame ◽  
Moment Resisting ◽  
Short Link

Eccentrically Braced Frame (EBF) is one of several types of braces that can be used in steel building. EBF has a good stiffness and ductility to withstand earthquake load. In EBF itself there are 3 types of links, namely: Long Link, Intermediate Link, and Short Link. Meanwhile, MRF of Moment resisting Frame is a structural system where the beams and columns are connected rigidly. MRF has a good ductility in accepting load even it has no lateral braces installed. In this research the Dafam Lotus Jember hotel consisting of 10 floors with total height of 33,6 m is modeled as a MRF system structure and steel structure equipped with EBF short link. The objective of this research is to compare the effectiveness of EBF and MRF in terms of displacement, axial force, shear force, and moment occurring in buildings. The modeling results show that EBF with short link has smaller displacement value compared to MRF. The difference between the two is 86,99%. In terms of axial force, shear force, and moment, EBF has smaller values than MRF. The differences are 79,76%, 53,91%, and 10,48% respectively. These results indicate that EBF has better capacity compared to MRF. Indonesia merupakan negara yang memiliki tingkat intensitas kegempaan yang tinggi. Ini menjadikan Indonesia tidak terhindarkan dari dampak negatif yang akan ditimbulkan oleh gempa bumi, yaitu menyebabkan kerusakan insfrastruktur fisik. Peraturan gempa SNI 03-1726-2012 membahas mengenai bresing sebagai salah satu alternatif yang dapat digunakan untuk menangani masalah gempa. Eccentrically Braced Frame (EBF) adalah salah satu jenis bresing yang memiliki kekakuan dan daktilitas yang baik jika dibandingkan dengan Concentrically Braced Frame (CBF) yang hanya memiliki kekakuan yang baik. Selain itu terdapat pula Moment Resisting Frame (MRF) yaitu salah satu sistem struktur yang memiliki sifat daktail. Melihat permasalahan yang ada, maka pembahasan ini bertujuan untuk membandingkan efektivitas dari EBF menggunakan short link dengan MRF apabila diaplikasikan pada bangunan Hotel Dafam Lotus Jember 10 lantai yang memiliki tinggi 33,6 m. Adapun efektivitas yang dibadingkan disini adalah nilai story displacement dan gaya dalam (momen, gaya geser, dan gaya aksial) yang terjadi. Hasil analisa dengan bantuan program analisa struktur menunjukkan bahwa EBF menggunakan short link memiliki nilai yang lebih kecil dibandingkan dengan MRF dalam menerima beban yang bekerja. Dari segi story displacement, selisih prosentasenya adalah 86,99% sedangkan untuk gaya dalam yang meliputi momen, gaya geser, dan gaya aksial, selisihnya secara berturut-urut adalah 79,76%, 53,91% dan 10,48%. Hal ini menunjukkan bahwa EBF menggunakan short link lebih efektif jika dibandingkan dengan MRF.

scholarly journals Numerical study of bracing section variations in an eccentrically braced frame

2020 ◽  
Vol 156 ◽  
pp. 05012
Author(s):  
Sabril Haris ◽  
Nidiasari ◽  
Sonya Triaz Pramadhani Putri
Keyword(s):  
Ultimate Load ◽  
Numerical Study ◽  
Cross Sectional ◽  
Braced Frame ◽  
Eccentrically Braced Frame ◽  
Moment Resisting Frame ◽  
Cross Sectional Dimension ◽  
Moment Resisting ◽  
The Cross ◽  
Short Link

Eccentrically Braced Frame (EBF) is a better option for the earthquake-prone country due to it having a better strength, stiffness, energy dissipation and ductility than Moment Resisting Frame (MRF) structure and more so than structures made of concrete. The structure’s ductility was influenced by the cross-sectional dimension and link element of the frame. This study aims to determine the relation behavior of EBF with the varied link element and cross-sectional of bracing with the ultimate load and ductility of the structure. The analysis was done using MSC. PATRAN/NASTRAN student edition software. A total of three-link model variations, each one represents the three-link variations of EBF; short link, intermediate link, and long link. As for the cross-sectional, variation was made on the flange and web thickness of the IWF profile and web thickness of the HSS profile. The most optimum performance of the structure was determined by displacement control and static monotonic loading. The result indicates that variations in the crosssectional of bracing effects the short link EBF the most, while the intermediate and long link EBF doesn’t show a significant change in terms of ultimate load. Meanwhile, ductility is not bound by the increase of bracing thickness.

Seismic response of concentrically braced dual steel frames

1993 ◽  
Vol 20 (4) ◽  
pp. 672-687 ◽  
Author(s):  
A. K. Jain ◽  
R. G. Redwood ◽  
Feng Lu
Keyword(s):  
Seismic Response ◽  
Steel Frames ◽  
Dual System ◽  
Seismic Load ◽  
Braced Frame ◽  
Moment Resisting Frame ◽  
Inelastic Analysis ◽  
Concentrically Braced ◽  
Moment Resisting ◽  
The Impact

Concentrically braced steel frames are one of the most commonly used structural systems because of their structural efficiency, simplicity to analyze and design, and ease of construction and repair. Canadian design codes provide specifications for their design under seismic loading based on the large amount of knowledge related to their seismic response accumulated over the past two decades. This paper examines the impact of a dual system with a moment resisting frame acting in parallel with the concentrically braced frame. Four different frames were designed in accordance with the National Building Code of Canada and CSA-S16.1-M89, and their inelastic responses are studied under the action of both monotonically increasing load and seismic load. The relative strengths and stiffnesses of the frames comprising the dual systems were varied. The ductility demands on members, and overall building deflections and storey drifts, were examined under the action of ten earthquake records. It is concluded that improved performance such as reduced ductility demand and improved uniformity of the distribution of yield throughout the structure can be achieved. However, the stiffness and strength in the moment resisting frame necessary to provide marked improvement must be a significant proportion of those of the braced frame. Key words: structural engineering, earthquakes, inelastic analysis, concentric bracing, dual system, steel, buckling.

scholarly journals AN INVESTIGATION OF THE EFFECTIVENESS OF THE FRAMING SYSTEMS IN STEEL STRUCTURES SUBJECTED TO BLAST LOADING

2014 ◽  
Vol 20 (6) ◽  
pp. 767-777 ◽  
Author(s):  
Amy Coffield ◽  
Hojjat Adeli
Keyword(s):  
Failure Modes ◽  
Plastic Hinge ◽  
Blast Loading ◽  
Steel Structures ◽  
Response Analysis ◽  
Plastic Hinges ◽  
Braced Frame ◽  
Concentrically Braced Frame ◽  
Moment Resisting ◽  
Applied Element Method

The effectiveness of different framing systems for three seismically designed steel frame structures subjected to blast loading is investigated. The three faming systems considered are: a moment resisting frame (MRF), a concentrically braced frame (CBF) and an eccentrically braced frame (EBF). The blast loads are assumed to be unconfined, free air burst detonated 15 ft (4.572 m) from one of the center columns. The structures are modeled and analyzed using the Applied Element Method, which allows the structure to be evaluated during and through failure. Failure modes are investigated through a plastic hinge analysis and member failure comparison. Also, a global response analysis is observed through comparison of roof deflections and accelerations. A conclusion of this research is that braced frames provide a higher level of resistance to the blast loading scenario investigated in this research. Both the CBF and EBF had a smaller number of failed members and plastic hinges compared to the MRF. They also had smaller roof deflection and acceleration. The CBF yielded the fewest number of plastic hinges but the EBF had a slightly fewer number of failed members.

scholarly journals ANALISIS PERIODA BANGUNAN DINDING GESER DENGAN BASE ISOLATOR AKIBAT GAYA GEMPA

Teras Jurnal ◽  
2018 ◽  
Vol 7 (2) ◽  
pp. 263
Author(s):  
Mul Muliadi Adi ◽  
M. Kabir Kabir Ihsan
Keyword(s):  
Seismic Design ◽  
Time History ◽  
Shear Wall ◽  
Braced Frame ◽  
Moment Resisting Frame ◽  
Rigid Frame ◽  
Base Isolator ◽  
Non Linear ◽  
Moment Resisting ◽  
Performance Based Seismic Design

Bangunan yang hancur oleh gempa dapat dicegah dengan memperkuat struktur bangunan terhadap gaya gempa yang bekerja padanya. Perkuatan bangunan dapat dilakukan dengan memperkaku bangunan dalam arah lateral yaitu <em>moment resisting frame</em> (<em>rigid frame</em>), <em>braced frame</em> dan <em>shear wall</em>. Bangunan dinding geser merupakan salah satu jenis <em>bangunan</em> tahan gempa gedung beton bertulang menggunakan sistem rangka struktur yang dikombinasikan. Kinerja gedung akan bertambah dan menjadi optimal jika pola penempatan <em>dinding geser</em> serta metode analisanya tepat. Sistem lainnya dalam mengurangi kerusakan bangunan akibat gempa dengan <em>performance based seismic design</em> yaitu dengan menggunakan <em>base isolator.</em>, yang memanfaatkan teknik analisa non-linear berbasis komputer untuk menganalisa perilaku inelastis struktur dari berbagai macam intensitas gerakan tanah (<em>gempa</em>), sehingga dapat diketahui kinerjanya pada kondisi kritis. Tujuan penelitian ini dilakukan untuk mengetahui perioda dalam penggunaan <em>base isolator </em>dengan yang tanpa menggunakan <em>base isolator,</em> pada bangunan sistem ganda, lantai 10 tingkat, bentuk beraturan pada bangunan dinding geser. Analisis data yang dilakukan dengan menggunakan bantuan <em>software </em>komputer <em>SAP2000</em>. Pembebanan pada gedung didasarkan pada peraturan bangunan gedung beton bertulang dan analisa dinamik <em>Time History Modal Analysi</em>s struktur dalam Tata Cara Perencanaan Ketahanan Gempa Untuk Struktur Bangunan Gedung Dan Non Gedung (SNI 1726:2012). Dari hasil penelitian ini dapat diketahui bahwa penggunaan <em>base isolator</em> memperbesar perioda alami. Nilai perioda pada dinding geser dan dinding geser <em>base isolator</em> besarnya berturut-turut 0.988 detik dan 2.465 detik. Hal ini menyebabkan gaya gempa yang bekerja menjadi lebih kecil.

scholarly journals COMPARISON STUDY OF BRACING CONFIGURATION WITH SHEAR LINK IN ECCENTRICALLY BRACED FRAME STEEL STRUCTURE

2020 ◽  
Vol 1 (1) ◽  
pp. 7
Author(s):  
Jusuf Wilson Meynerd Rafael ◽  
Alva Yuventus Lukas
Keyword(s):  
Seismic Analysis ◽  
Response Spectrum ◽  
Structural Response ◽  
Steel Structure ◽  
Structure Design ◽  
System Structure ◽  
Structural Element ◽  
Braced Frame ◽  
Building Model ◽  
Best Response

The EBF structural system is identified by the use of bracing and link beams as components that work to receive lateral seismic loads. The position of the link beam makes the EBF system have several choices of bracing configuration; D-Braces, Split K-Braces, V-Braces, Split K & Inverted Split K-Braces, Inverted Y-Braces. Structural analysis was carried out on a 10-story building model for the EBF system with different type of bracing configurations using the ETABS software. All models analyzed according to Indonesian Code (SNI 1729:2015 and SNI 1726:2019) to obtain the structural element. Seismic analysis uses the response spectrum analysis method to obtain the structural response parameters in the EBF system. Result of the analysis for all of bracing configuration are shown that Split K-Braces model has the best response parameters when compared to the MRF system. The  lowest value for the parameter is owned by Inverted Y-Braces, although overall it is still larger than the MRF system. The bracing configuration greatly affects the response of EBF system due to the behavior that occurs in the link beam, therefore the selection for type of bracing configuration is also important in the EBF system structure design.

scholarly journals Behavior of Shear Link of WF Section with Diagonal Web Stiffener of Eccentrically Braced Frame (EBF) of Steel Structure

2010 ◽  
Vol 42 (2) ◽  
pp. 103-128 ◽  
Author(s):  
Yurisman Yurisman ◽  
Bambang Budiono ◽  
Muslinang Moestopo ◽  
Made Suarjana
Keyword(s):  
Steel Structure ◽  
Braced Frame ◽  
Shear Link ◽  
Eccentrically Braced Frame

scholarly journals Evaluation of behavior and performance of the braced/ unbraced four story of steel frame with semi rigid connection

2019 ◽  
Vol 270 ◽  
pp. 01002
Author(s):  
Daniel Rumbi Teruna
Keyword(s):  
Stiffness Parameter ◽  
Braced Frame ◽  
Analysis And Design ◽  
Moment Resisting Frame ◽  
Story Drift ◽  
Moment Resisting ◽  
Inelastic Behaviour ◽  
Rigid Connection ◽  
And Performance ◽  
The Moment

Structural analysis and design with taken into account the flexibility of the beam to the column connections of steel frameworks takes on importance of the growing development and utilization of new commercial software. However, for design purposes, the beam to the column connection are usually considered to be either pinned or fully rigid, and drastically simplifies the analysis and design procedures. In this paper, a four story of unbraced and concentric braced steel moment resisting frame having different connection stiffness is analysed using linear and nonlinear static procedure. In the finite element modelling, the semi rigid connection is modelled by rotational spring having linear moment and rotation relationship. To account the inelastic behaviour of beam and column members, concentrated plastic hinges based on FEMA 356 are applied for both ends of the member. It was found that, the response quantity of the unbraced frame are influenced by the flexibility connection. However, for the braced frame the effect of the initial connection stiffness parameter on the response quantity can be neglected due to present of the braces. Furthermore, the higher the initial connection stiffness parameter, the smallest the story drift index. Moreover, the present of the braces at the moment resisting frame (braced frame) reduce the sensitivity of the connection stiffness on the behaviour and the performance frame under consideration.

scholarly journals Retrofitting the Structure of the Catalytic Cracking Reactor, from Petrobrazi Refinery, Ploieşti by Transforming the Steel Structure into a Moment Resisting Frame and Enhancing the Damping of the Structure by Means of Viscous Dampers

2015 ◽  
Vol 11 (4) ◽  
pp. 33-49
Author(s):  
Ionuţ Vasilescu ◽  
Emil Tănase ◽  
Dragoş Marcu
Keyword(s):  
United States ◽  
Catalytic Cracking ◽  
Feasible Solution ◽  
Steel Structure ◽  
Viscous Damping ◽  
Structural System ◽  
Viscous Dampers ◽  
Type Steel ◽  
Moment Resisting Frame ◽  
Moment Resisting

Abstract The present paper presents the structural and seismic retrofit solution for the structure of the Catalytic Cracking Reactor, from Petrobrazi Refinery, Ploiești, Romania. The spatial truss type steel structure was designed and built during 1965-1968, following United States codes of that time. The capacity of the reactor is intended to be increased, thus its weight increases by approx. 43%. The retrofit solution had to take into consideration many criteria, not only technical, but also technological. After analyzing several possibilities, it was decided that the only feasible solution in order to fulfill all these requirements was to significantly increase the viscous damping of the structure – by introducing viscous dampers in its diagonals, accompanied by the strengthening of steel structure and changing the structural system into a moment resisting frame.

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