超高性能混凝土界面直剪性能试验研究
Experimental Study on the Interfacial Direct Shear Performance of Ultra-high Performance Concrete
石伟 1刘汶2
作者信息
- 1. 中广核(文昌)新能源有限公司,海南 文昌 571300
- 2. 南昌大学工程建设学院,江西 南昌 330031
- 折叠
摘要
在装配式结构中混凝土预制构件之间可靠的连接至关重要,不仅可保证梁柱之间的协同工作,还能有效提高结构的抗震性能和承载能力.为研究使用超高性能混凝土(UHPC)和高强钢筋搭接连接的节点的受剪性能,文中设计制作了 2 个Z形试件,主要考虑钢筋搭接长度对UHPC直剪性能的影响.结果表明,试件整个加载过程可分为弹性阶段、裂缝发展阶段和破坏滑移阶段.当钢筋的搭接长度由6d提升到8d时,试件的抗剪承载力提升了3.7%,同时也明显提高了抗剪钢筋与混凝土之间的黏结性能.为满足UH-PC界面直剪性能要求,钢筋搭接长度建议取值8d.
Abstract
The reliable connection between the prefabricated beam and column is one of the most important connection in the prefabricated con-crete structure,which not only ensures the collaboration between beams,columns and beam-column joint,but can also effectively improve the seismic performance and bearing capacity of the prefabricated concrete structure.In order to study the shear performance of prefabricated com-ponent connection with ultra-high-performance concrete(UHPC)and high-strength steel bars,two Z-shaped test parts with the effect of reinforcement lapping length were designed and analyzed.The experimental results show that the entire loading process of the test parts can be roughly divided into three stages:elastic phase,crack development stage,and destructive slip.When the reinforcement lapping length is in-creased from 6d to8d,the shear carrier capacity of the test parts increases increased 3.7%,and the shear reinforcement and concrete adhesion performance can be also enhanced.In addition,the reinforcement lapping of 8d is recommended to use in the UHPC shear connection.
关键词
超高性能混凝土/高强钢筋/钢筋搭接/直剪性能/试验研究Key words
Ultra-high-performance concrete(UHPC)/High strength reinforcement/Reinforcement lapping/Direct shear performance/Exper-imental study引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据