Effect of Fling-Step on Seismic Response of Steel Eccentrically Braced Frame Structures

This paper investigates the consequences of well-known characteristics of near-fault ground motions on the seismic response of steel moment frames. Additionally, idealized pulses are utilized in a separate study to gain further insight into the effects of high-amplitude pulses on structural demands. Simple input pulses were also synthesized to simulate artificial fling-step effects in ground motions originally having forward directivity. Findings from the study reveal that median maximum demands and the dispersion in the peak values were higher for near-fault records than far-fault motions. The arrival of the velocity pulse in a near-fault record causes the structure to dissipate considerable input energy in relatively few plastic cycles, whereas cumulative effects from increased cyclic demands are more pronounced in far-fault records. For pulse-type input, the maximum demand is a function of the ratio of the pulse period to the fundamental period of the structure. Records with fling effects were found to excite systems primarily in their fundamental mode while waveforms with forward directivity in the absence of fling caused higher modes to be activated. It is concluded that the acceleration and velocity spectra, when examined collectively, can be utilized to reasonably assess the damage potential of near-fault records.

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Seismic Design and Performance of Dual Moment and Eccentrically Braced Frame System Using PBPD Method

Latin American Journal of Solids and Structures ◽

10.1590/1679-78253425 ◽

2017 ◽

Vol 14 (3) ◽

pp. 441-463 ◽

Cited By ~ 2

Author(s):

A. Karamodin ◽

A. Zanganeh

Keyword(s):

Seismic Design ◽

Braced Frame ◽

Eccentrically Braced Frame ◽

Frame System ◽

And Performance

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Seismic response and failure mechanism of underground frame structures based on dynamic centrifuge tests

Earthquake Engineering & Structural Dynamics ◽

10.1002/eqe.3434 ◽

2021 ◽

Author(s):

Chengshun Xu ◽

Zihong Zhang ◽

Yang Li ◽

Xiuli Du

Keyword(s):

Seismic Response ◽

Failure Mechanism ◽

Frame Structures ◽

Centrifuge Tests

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The green roof effect on the seismic response of RC frame structures

Innovative Infrastructure Solutions ◽

10.1007/s41062-021-00708-5 ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Emad A. Elhout

Keyword(s):

Seismic Response ◽

Green Roof ◽

Frame Structures ◽

Rc Frame ◽

Rc Frame Structures

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

Jurnal Rekayasa Sipil dan Lingkungan ◽

10.19184/jrsl.v2i01.7435 ◽

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.

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