摘要
与普通硅酸盐混凝土中间层梁柱边节点相比,地聚物边节点在破坏形态和裂缝发展、开裂荷载和极限荷载、荷载-变形滞回曲线等方面表现类似。但是在强度降低与刚度退化方面,地聚物边节点表现出更明显的趋势。基于现有研究,2类混凝土边节点的延性和耗能能力等抗震性能的优劣无法得出定论。掺入钢纤维可以改善地聚物梁柱边节点的力学性能和抗震性能。现有混凝土结构设计规范可以用于地聚物混凝土一般层边节点的设计。文中综述了目前地聚物混凝土梁柱节点抗震性能的研究进展,对地聚物混凝土和普通混凝土梁柱边节点抗震性能的优劣异同进行了分析与讨论,并从材料层面对2类混凝土边节点的性能差异进行了解释,为地聚物混凝土梁柱节点以后的研究指明了方向。
Compared with conventional concrete exterior beam-column joints,geopolymer concrete exterior joints show similar trends in failure mode and crack development,cracking load and ultimate load,load-deformation hysteretic curve.However,geopolymer concrete exterior joints show a more obvious tendency in strength and stiffness decrease.In addition,in ductility and energy dissipation capacity,results are controversial.Steel fibers can improve the performance of geopolymer exterior beam-column joints.The existing standards for conventional concrete joints can be used for the design of general layer exterior beam-column joints of geopolymer concrete,and the seismic performance of geopolymer concrete exterior beam-column joints can be guaranteed according to the design.This paper reviews the research progress on geopolymer concrete beam-column joints,discusses and explains the advantages and shortcomings of the two types of concrete joints at the material level.It points out the direction for future research of geopolymer concrete joints.
作者
毛宇光
刘钰中
苏捷
杜运兴
胡翔
史才军
MAO Yuguang;LIU Yuzhong;SU Jie;DU Yunxing;HU Xiang;SHI Caijun(Key Laboratory for Green&Advanced Civil Engineering Materials and Application Technology of Hunan Province,College of Civil Engineering,Hunan University,Changsha 410082,China;International Innovation Center for Green&Advanced Civil Engineering Materials of Hunan Province,College of Civil Engineering,Hunan University,Changsha 410082,China;Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education,Hunan University,Changsha 410082,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2022年第5期39-52,共14页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51638008)。
关键词
地聚物混凝土
梁柱节点
边节点
抗震性能
geopolymer concrete
beam-column joints
exterior joints
seismic performance
