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学术报告

发布日期:2019-03-15  点击数:  作者:

报告题目:Material mechanical properties necessary for structural intervention of concrete structures

人:UEDA TamonHokkaido University

报告时间:力学楼二楼会议室

报告地点:2019319日(星期二)下午2:30-4:15

报告人简介:

UEDA Tamon日本工程院院士,现就职于日本北海道大学。国际结构混凝土协会(FIB)技术委员会委员,国际土木工程FRP学会(IIFC)顾问委员会主席,ISO/TC71/SC7(混凝土结构维护和修复)主席,AUN / SEED-Net首席顾问兼代理执行董事,JSCE国际活动中心副主席兼高级主任,北海道土木工程技术协会副主席。曾担任亚洲混凝土联盟会(ACF)会长,亚洲混凝土模式规范委员会(ICCMC)主席等多项重要职务。主要研究方向包括混凝土和混合结构的数值分析,结构生命周期预测,结构性能改善,抗震设计和结构设计方法学。曾获国际混凝土协会(fib)荣誉勋章(the Medal of Merit),日本土木工程学会(JSCE)混凝土领域最高奖“吉田奖”(Yoshida Prize),国际事务领域最高奖"国际贡献终身成就奖",日本混凝土学会(JCI)“功劳奖",ASCE Journal of Composites in Construction和Advances in Structural Engineering最佳论文奖。

报告摘要:Structural intervention is to restore and/or upgrade mechanical performances of structures. There are many methods for structural intervention for concrete structures, whose structural materials and structural details are often different from those in existing structures to be intervened. Not only concrete and steel, which are typical materials for concrete structures, but also fiber reinforced polymers (FRP), cementitious materials with fibers and polymers and adhesives are often applied for structural intervention. There are various fibers and polymers used for interventions. The prediction method for structural performance of concrete structures are based on mechanical properties of concrete and steel. Stress-strain relationship of steel is unique in comparison with other materials, which is characterized with the yielding point and high fracturing strain. In order to predict structural performance, therefore, we need to develop generic method applicable to not only steel but also other materials. The generic model can tell us what would be the mechanical property to make the structural performance better. External bonding, which is a typical scheme for structural intervention, is not for new structures. Therefore, it is necessary to clarify the material properties and structural details to achieve better bonding strength at interface between substrate concrete and externally bonded material.