MECHANISM OF VERTICAL CRACK GENERATION ON MESNAGER HINGE

• UEMURA Keita

  京都大学大学院工学研究科

• TAKAHASHI Yoshikazu

  京都大学 工学研究科

• GOTO Hiroyuki

  京都大学 防災研究所

Bibliographic Information

Other Title

• メナーゼヒンジにおける縦方向のひび割れの発生メカニズムに関する検討

Abstract

 In Mesnager hinge, cracks are known to generate on concrete in the hinge throat and propagate above the hinge throat (hereinafter, the crack is called “the vertical crack”). Japanese seismic code assumes that transmission force due to bond between concrete and crossing reinforcing bars causes the cracks. However, the factual mechanism of the crack generation has not been investigated. Recently, cyclic loading tests for rocker piers with Mesnager hinge were conducted, and this study investigated the results of these cyclic loading test. From the results, the vertical cracks were observed in all the specimens including one in which plain rebars used as crossing reinforcing bars, and the cracks did not propagate along crossing reinforcing bars. Thus, the assumption of vertical crack generation is not correct in Japanese seismic code. The crack generation was numerically validated by using X-FEM. The results showed that the vertical cracks were generated by compression load on concrete in the hinge throat.

Journal

• Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))

  Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 76 (4), I_363-I_376, 2020

  Japan Society of Civil Engineers

Keywords

• Mesnager hinge
• crack propagation
• cyclic loading test
• extended finite element method

Details

• CRID: 1390848647544609408
• NII Article ID: 130007897888
• DOI: 10.2208/jscejseee.76.4_i_363
• ISSN: 21854653
• HANDLE: 2433/269675
• Web Site: https://www.jstage.jst.go.jp/article/jscejseee/76/4/76_I_363/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed