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

Research Project

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
Project Status	Completed (Fiscal Year 2017)
Budget Amount *help	¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000) Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000) Fiscal Year 2016: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000) Fiscal Year 2015: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
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 / 混合構造接合部 / 長期性能 / 疲労 / 長期挙動
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.