项目名称: 再生混凝土构件复合受力性能和冻融环境下结构力学性能试验研究与设计方法
项目编号: No.51278151
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 建筑科学
项目作者: 邹超英
作者单位: 哈尔滨工业大学
项目金额: 79万元
中文摘要: 针对再生混凝土构件复合受力性能和冻融循环作用下结构基本力学性能及相应的设计方法展开研究。主要内容包括:(1)研究再生骨料精细化分级与再生混凝土科学化制备方法,建立再生混凝土配合比设计方法及用于不同强度等级混凝土的再生骨料关键技术指标。(2)进行再生混凝土构件压弯剪扭复合受力性能试验及基本力学性能对比试验与理论研究,揭示复合受力作用下结构失效的破坏特征、界面形态以及微观机制。(3)进行冻融循环作用下再生混凝土结构基本力学性能试验与理论研究,为寒冷地区再生混凝土结构极限状态设计及耐久性设计奠定基础,提高结构的抗冻安全性。(4)建立复合受力再生混凝土结构设计方法及冻融循环作用下再生混凝土结构设计方法及安全性评价,指导再生混凝土结构工程设计。通过本项目的研究,完善再生混凝土结构的设计理论,同时形成冻融循环下再生混凝土结构较系统的分析与设计理论,提升我国再生混凝土研究水平,促进再生混凝土的推广应用。
中文关键词: 再生混凝土;复合受力;冻融循环;本构模型;设计方法
英文摘要: The objective of the project is to conduct the experimental study and design method for the combined force performance of the recycled concrete structural member and the basic mechanical properties of the recycled concrete structure in the freeze-thaw condition. The main contents include: (1) To study the refined classification for recycled aggregate and the scientific preparation method of the recycled concrete, to establish a design method for the mixture ratio of the recycled concrete, and for different strength grade of the recycled concrete, to found the key qualification for the recycled aggregate. (2) To carry out the experiments and the theoretical study of the combined force performance of the recycled concrete structural member, and to conduct the contrast tests and the theoretical study of the basic mechanical properties of the recycled concrete structural member, to reveal the failure characteristics, interface morphology and microstructure mechanism of the failure structure under the combined force action. (3) To perform the experiments and the theoretical study of the basic mechanical properties of the recycled concrete structure under the freeze-thaw cycle action, to lay a foundation for the limit state design and durability design of the recycled concrete in the cold region, to improve the frost-
英文关键词: recycled concrete;combined force;freeze-thaw cycle;constitutive model;design method