Seismic Design for Buildings

Khan, Mohiuddin Ali

doi:10.1016/b978-1-85617-501-2.00010-9

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…The hysteresis loop is represented by the relationship between the base-shear coefficient BSC and drift ratio θ using the measured data from the accelerometers and LVDTs. The base shear is defined as the estimated maximum lateral force exerted on the base of the structure attributed to a lateral seismic load [41]; the BSC normalized by its own weight indicates the structural resistance against the lateral load. The BSCs of the west and east walls are denoted by BSC W and BSC E , respectively.…”

Section: Hysteresis Analysismentioning

confidence: 99%

Investigation on the behavior factor of leaning masonry wall structures

Choi

Park²,

Kim³

et al. 2023

Bull Earthquake Eng

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In force-based seismic design, the behavior factor q (or response modification factor R) is devised to prevent overdesign by reducing the design force. Different values of the behavior factor q are available for various structure types. However, masonry fence walls are not categorized in the current seismic design codes. These walls are of poor quality due to the absence of proper quality assurance and maintenance, and most of those structures are inclined. In this study, the behavior factor q of leaning masonry fence walls is experimentally estimated. We fabricate three masonry wall structures that are inclined with three different wall angles of 1.5°, 3.0°, and 6.0°, respectively. Monotonically increasing biaxial lateral loads are applied to the walls using a shaking table. The value q of each leaning wall is calculated by analyzing the dynamic load-displacement relationship. A relationship between the factor q and wall angle is discussed, and a new empirical formula representing q as a function of a wall angle is proposed. The proposed empirical formula would be useful in seismic design for severely leaning masonry walls.

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Section: Hysteresis Analysismentioning

confidence: 99%

Investigation on the behavior factor of leaning masonry wall structures

Choi

Park²,

Kim³

et al. 2023

Bull Earthquake Eng

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“…Analisis pushover adalah dimana suatu struktur dikenai beban gravitasi dan pola beban lateral yang dikendalikan dan terus meningkat sampai tercapai kondisi ultimit dengan tujuan untuk memperkirakan respons keruntuhan deformasi struktural seismik. Analisis pushover biasanya digunakan untuk mengevaluasi kapasitas seismik dari struktur yang ada (Khan, 2013).…”

Section: Pendahuluanunclassified

“…Analisis pushover adalah prosedur statis yang menggunakan teknik nonlinier yang disederhanakan untuk memperkirakan deformasi struktural seismik. Sebagai komponen individu dari struktur yang luluh atau gagal, gaya dinamis pada bangunan dialihkan ke komponen lain (Khan, 2013).…”

Section: Analisis Pushoverunclassified

Analisa Nilai Faktor Daktilitas Dengan Metode Pushover Dengan Perkuatan Bresing Diagonal Tunggal

Sutanto

Christianto²

2022

j. mitra teknik sipil

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Changes in design regulations cause differences in earthquake forces so that additional reinforcement is needed to meet earthquake-safe high-rise buildings, so they are reinforced with steel braced. Bracing can increase the stiffness and strength of the structure and improve the structure in accepting lateral loads and resisting lateral displacement without adding a large mass. Concrete and steel structures are different materials and will affect the response modification factor (R) value in the calculation of earthquake loads. In SNI 1726:2019, part of the combined moment-bearing frame system of steel and concrete, the value of R itself hasn't been explicitly regulated. Therefore, the purpose of this research is to analyze the value of the combined structural ductility factor for reinforced concrete and steel braced structures. Analysis results show that diamond braces are the best model from the tests carried out, have a ductility factor value in the X-direction, R of 5.575, 0 of 2.883, and Cd of 1,44. Meanwhile, for the Y-direction, R is 7.499, 0 is 2.118, and Cd is 1.07. Performance level based on ATC40, X-direction diamond braced is Immediate Occupancy, and Y-direction is Damage Control. Based on FEMA 356, the X-direction and the Y-direction are Immediate Occupancies. Keywords: pushover analysis, response modification factor, overstrength factor, deflection amplification factor, bracing.ABSTRAK Perbedaan peraturan desain menyebabkan perbedaan gaya gempa diperlukan perkuatan tambahan untuk memenuhi bangunan tinggi yang aman terhadap gempa, salah satunya diperkuat dengan menambahkan bresing atau baja pengaku. Bresing dapat meningkatkan kekakuan dan kekuatan struktur membantu meningkatkan struktur dalam menerima beban lateral dan menahan simpangan lateral (menstabilkan) tanpa menambah massa yang besar. Struktur beton dan baja merupakan material yang berbeda, dan akan mempengaruhi pemilihan nilai faktor modifikasi respon (R) dalam perhitungan beban gempa. Dalam SNI 1726:2019 bagian sistem rangka pemikul momen gabungan baja dan beton, nilai R sendiri belum diatur secara eksplisit. Oleh karena itu, tujuan dalam penulisan ini adalah unutk menganalisa dan menunjau nilai faktor daktilitas struktur gabungan yaitu struktur beton bertulang dan bresing baja. Hasil analisis menunjukan bahwa diamond bresing adalah model paling baik dari uji yang dilakukan, memiliki nilai faktor daktilitas arah X yaitu R sebesar 5,575, nilai ?0 sebesar 2.883 dan nilai Cd sebesar 1,44. Sementara untuk arah Y yaitu R sebesar 7,499, nilai ?0 sebesar 2,118 dan nilai Cd adalah 1,07. Tingkat kinerja berdasarkan ATC40, diamond bresing arah X adalah Immediate Occupancy, arah Y adalah Damage Control. Berdasarkan FEMA 356, tingkat kinerja arah X adalah Immediate Occupancy, arah Y, memiliki tingkat kinerja Immediate Occupancy.

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