Fundamental Issues Towards Unified Design Theory of Recycled and Natural Aggregate Concrete Components

作     者：Jianzhuang Xiao Kaijian Zhang Tao Ding Qingtian Zhang Xuwen Xiao Jianzhuang Xiao;Kaijian Zhang;Tao Ding;Qingtian Zhang;Xuwen Xiao

作者机构：Department of Structural EngineeringTongji UniversityShanghai 200092China College of Civil Engineering and ArchitectureGuangxi UniversityNanning 530004China College of Civil EngineeringFuzhou UniversityFuzhou 350116China 

出 版 物：《Engineering》 (工程（英文）)

年 卷 期：2023年第29卷第10期

页      面：188-197页

核心收录：

学科分类：0810[工学-信息与通信工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0808[工学-电气工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：the financial support from the Distinguished Young Scholars of China by the National Natural Science Foundation of China(51325802) the National Natural Science Foundation of China(51178340,52078358,and 52008304) 

主　　题：Recycled aggregate concrete(RAC) Natural aggregate concrete(NAC) Strength determination Constitutive relation Reliability Unified design theory 

摘      要：In the past 20 years,recycled aggregate concrete(RAC),as a type of low-carbon concrete,has become a worldwide focus of ***,the design methodology for RAC structural components remains a ***,demands for a unified design of natural aggregate concrete(NAC)and RAC components have been ***,this study analyses the necessity of a unified design theory and provides an in-depth demonstration of the strength determination,compressive constitutive relationship,and design method of concrete *** coefficient of variation of RAC strength is found to be generally higher than that of NAC *** compressive and tensile strengths of RAC can be defined and determined using the same method as that used for *** uniaxial compressive constitutive relationship between NAC and RAC has a unified mathematical ***,the elastic modulus of RAC decreases,and its brittleness exhibits an increasing trend compared with that of ***,to unify the design formulae of RAC and NAC components for bearing capacity,modification factors for RAC components are proposed considering safety and ***,the feasibility of the proposed unified time-dependent design theory is demonstrated in terms of conceptual design and structural measures considering the effects of strength degradation and reinforcement *** is believed that this study enriches and develops the basic theory of concrete structures.