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121 results on '"Koetaka, Yuji"'

1. Proposal of Design Lateral Load for Column Joint of Steel Moment Frame

Author

Chan, Iathong, Koetaka, Yuji, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Mazzolani, Federico M., editor, Piluso, Vincenzo, editor, Nastri, Elide, editor, and Formisano, Antonio, editor

Published
2024
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2. Bidirectional Loading Test of Buckling-Restrained Braces with Gusset Plate Connections

Author

Koetaka, Yuji, Tamura, Yuki, Tobari, Ryota, Kinoshita, Tomohiro, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Mazzolani, Federico M., editor, Piluso, Vincenzo, editor, Nastri, Elide, editor, and Formisano, Antonio, editor

Published
2024
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3. Bi-Directional Loading Tests of Weak Panel-Type Subassemblies Consisting of Circular-Hollow-Section Columns and H-Beams with Floor Slab

Author

Ashida, Yosuke, Koetaka, Yuji, Nakano, Tatsuya, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Mazzolani, Federico M., editor, Piluso, Vincenzo, editor, Nastri, Elide, editor, and Formisano, Antonio, editor

Published
2024
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5. Yielding Mode Classification of Composite Beam-Square Hollow Section Column Subassemblies Under Bidirectional Loading

Author

Wang, Yandong, Koetaka, Yuji, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Mazzolani, Federico M., editor, Dubina, Dan, editor, and Stratan, Aurel, editor

Published
2022
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20. CYCLIC LOADING TEST OF CRUCIFORM FRAME USING HIGH STRENGTH STEEL BOX－SECTION COLUMN TO BEAM MOMENT CONNECTION WITH EXTERIOR DIAPHRAGM

Author

Morioka Hiromitsu, Kinoshita Tomohiro, Suita Keiichiro, Koetaka Yuji, Oba Ryosuke, and Murakami Yukio

Subjects
Materials science, business.industry, Connection (principal bundle), Frame (networking), Diaphragm (mechanical device), Building and Construction, Structural engineering, Moment (mathematics), Section (fiber bundle), Cruciform, Column (typography), Architecture, business, Beam (structure)
Published
2020

32. Feasibility of tension braces using Cu-Al-Mn superelastic alloy bars

Author

Araki, Yoshikazu, Maekawa, Nao, Shrestha, Kshitij C., Yamakawa, Makoto, Koetaka, Yuji, Omori, Toshihiro, and Kainuma, Ryosuke

Subjects
steel frame, shape memory alloy (SMA), superelastic alloy (SEA), Cu-Al-Mn, shaking table test, tension-only brace
Abstract

This paper investigates the feasibility of tension braces using Cu–Al–Mn superelastic alloy bars as energy dissipating and self-centering elements for steel frames by performing 1/3 scale shaking table tests. The difficulty with conventional steel tension braces lies in pinching or significant deterioration of stiffness and strength under cyclic loading. When a steel frame with conventional tension braces is subjected to intense earthquakes, pinching may lead to a large residual drift and/or instability. To overcome the difficulty, this paper examines the effectiveness of Cu–Al–Mn superelastic alloy bars, facilitated by their large recovery strain, low material cost, and high machinability, as a partial replacement of steel bars in tension braces. In the shaking table tests, a 1/3 scaled 1-bay, 1-story steel frame with the present tension braces is subjected to quasi-static cyclic loading and dynamic harmonic ground motions of 6 Hz. Both the static and dynamic test results demonstrate the effectiveness of the present braces in avoiding pinching under the ductility ratio up to 3. The dynamic test results also demonstrate the capability of the present tension braces in reducing the peak response acceleration within the base shear capacity. To study the rate dependence of the frame response, further, time-history analyses are performed by using a SDOF model based on a uniaxial rate-independent model, calibrated with the quasi-static tests. A comparison of the analytical results with the dynamic test results demonstrates that the rate dependence of the frame response is negligible up to the loading frequency of 6 Hz.

Published
2014

41. MECHANICAL PERFORMANCE AND SEISMIC RESPONSE OF KNEE BRACE DAMPER STRUCTURE OF H-SA700 HIGH STRENGTH STEEL MEMBERS MADE BY UNDERMATCHED WELDS

Author

SHINSAI, Naoki, SUITA, Keiichiro, and KOETAKA, Yuji

Subjects
knee brace damper, 隅肉溶接, 方杖ダンパー, 地震応答解析, 柱梁接合部, beam-to-column connection, アンダーマッチング溶接, undermatched weld, high strength steel, 高強度鋼, seismic response analysis, fillet weld
Abstract

This paper presents results of loading tests of H-SA700 high strength steel structures in which beams and columns are made by undermatched welds and constructed by knee brace dampers. The feasibility of high strength bolted joints of high strength steel members with knee brace dampers and mechanical performance of the beam-column subassemblages are verified by loading tests. The advantage of high strength steel is verified by examples of the design of structures and the results of time history response analyses comparing with the structures made by usual mild steel., Transactions of AIJ. Journal of structural and construction engineering

Published
2012

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