Seismic performance of steel chevron braced frames designed according to Japanese practice

Akiri Seki, Keisuke Inoue, Taichiro Okazaki, Shogo Hashioka, Hayato Asada

研究成果: Article査読

抄録

Six steel braced-frame specimens and nine isolated brace specimens were tested to examine the seismic behavior of steel chevron braced frames designed and constructed according to the current Japanese practice. The braced-frame specimens placed a pair of braces in a “chevron” arrangement, in a single-bay, single-story moment-resisting frame. The braces had either a round-HSS or I section. The bracing connections adopted either slip-critical bolted connections as is the norm in Japan or a field-welded connection following U.S. recommendations. The specimens were subjected to a cyclic loading sequence that is similar in severity to the protocol specified for steel moment-resisting frames in the U.S. seismic provisions. The test results suggest that chevron braced frames with compact braces and using moment-resisting beam-to-column connections can safely develop large story drifts exceeding 0.03 rad. The force unbalance between the tension and compression braces led to large beam deflection and, in some cases, torsion, which in turn limited the tensile axial forces in the braces. The lateral resistance at key limit states matched the strength computed based on plastic analysis.

本文言語English
論文番号107066
ジャーナルJournal of Constructional Steel Research
189
DOI
出版ステータスPublished - 2022 2月

ASJC Scopus subject areas

  • 土木構造工学
  • 建築および建設
  • 材料力学
  • 金属および合金

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