题目：Material mechanical properties necessary for structural intervention of concrete structures
报告 人：UEDA Tamon
时间：2019年3月18日，10：00-11：30
地点：安中大楼B226
报告简介：
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.
This lecture presents the mechanical property of substrate concrete and intervention material;
(1) to achieve better shear strength and ultimate deformation of member after structural intervention, and (2) to achieve better debonding strength for external bonding. Some of the mechanical properties and structural details necessary for better structural performance for structures with structural intervention are different and new from those for structures without intervention. For example, high strength and stiffness are properties for materials in structures without structural intervention, while high fracturing strain and low stiffness are properties for structural intervention materials.
报告人简介:
上田多门教授，日本工程院院士，日本东京大学工学博士，现就职于北海道大学环境创生工学以及社会基础设施管理学院。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。出版学术专著17本，发表期刊论文200余篇，会议论文400余篇，受邀作国际会议大会/邀请报告/讲座130余次。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，日本预应力混凝土学会最佳论文奖，ASCE Journal of Composites in Construction 和 Advances in Structural Engineering最佳论文奖。
上田教授长期以来一直和国内的高校和科研院所保持密切的合作关系，曾被聘为大连理工大学海天学者和浙江大学包玉刚首席教授，现为深圳大学特聘教授。
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