Long-term behavior of joint connection in steel-concrete hybrid structural system

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H04030
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Saitama University
• Principal Investigator: Maki Takeshi 埼玉大学, 理工学研究科, 准教授 (60292645)
• Co-Investigator(Kenkyū-buntansha): 斉藤 成彦 山梨大学, 大学院総合研究部, 教授 (00324179) ; 浅本 晋吾 埼玉大学, 理工学研究科, 准教授 (50436333)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 鋼－コンクリート複合構造 / 直列混合桁 / 接合部 / 長期変形 / ずれ止め / 押抜き試験 / クリープ

Outline of Final Research Achievements

The long-term external load acting on steel-concrete joint connection in steel-concrete hybrid structural system may induce additional deformation in shear connectors and their surrounding concrete. The long-term slip increment in shear connecting system leading to the deformation of joint connection is experimentally and numerically clarified in this research. The push-out test specimens with headed stud shear connectors were loaded with sustained external shear force for a month, and the long-term slip was numerically simulated by nonlinear finite element analysis. Furthermore, the long-term sustained loading test of joint connection between composite girder and prestressed concrete girder was also conducted so that the long-term deflection increment under various load level was quantified.

Free Research Field

土木工学