摘要
为了研究不同的钢筋连接方式对预应力混凝土叠合板的抗弯性能的影响,设计并进行了8个预应力混凝土叠合板的抗弯试验。采用足尺模型研究了预制混凝土底板间隙、端部连接钢筋直径、连接方式等因素对预应力混凝土叠合板抗弯性能的影响。结果表明,预应力混凝土叠合板的抗弯性能与预应力混凝土底板间隙、端部连接钢筋直径关系不大,而与连接方式有关;采用传统胡子筋连接的预应力混凝土叠合板的开裂荷载与极限承载力均明显大于采用端部连接钢筋连接的预应力混凝土叠合板,同时采用传统胡子筋连接的预应力混凝土叠合板的抗弯刚度更大,钢筋与混凝土粘结性能更好。试验中预制底板与后浇层混凝土的粘结锚固性能是影响预应力混凝土叠合板抗弯性能的关键因素,实际工程中预制底板表面的粗糙处理是必不可少的。
In order to study the influence of different reinforcement connection methods on the flexural performance of prestressed concrete composite slabs,flexural tests were conducted on eight groups of prestressed concrete composite slabs.The full-scale model was used to study the influence of the factors such as the gap of the precast concrete bottom floor,the diameter of the end connecting reinforcement and the connection method on the flexural performance of the prestressed concrete composite slab.The results show that the flexural performance of the prestressed concrete composite slab has little to do with the gap of the prestressed concrete bottom floor and the diameter of the end connecting reinforcement,but is related to the connection method;the cracking load and the ultimate bearing capacity of the prestressed concrete composite slab connected with the traditional beard reinforcement are obviously greater than those of the prestressed concrete composite slab connected with the end connecting reinforcement,and the traditional prestressed concrete composite slab connected with the traditional beard reinforcement has larger flexural rigidity and better bond performance between the reinforcement and the concrete.In the test,the bond and anchorage performance of the precast bottom floor and the post-cast layer concrete is the key factor affecting the flexural performance of the prestressed concrete composite slab,and the rough treatment of the surface of the precast bottom floor is essential in the actual project.
作者
侯和涛
代春雪
王文豪
刘锦伟
方明霁
刘海宁
Hou Hetao;Dai Chunxue;Wang Wenhao;Liu Jinwei;Fang Mingji;Liu Haining(School of Civil Engineering,Shandong University,Jinan 250061,China;College of Civil Engineering,Shanghai Normal University,Shanghai 201400,China;Shanghai Tunnel Engineering&Rail Transit Design and Research Institute,Shanghai 200235,China)
出处
《建筑结构》
CSCD
北大核心
2020年第2期61-66,共6页
Building Structure
基金
国家自然科学基金项目(51508331)
山东省自然科学基金项目(ZR2016EEM07).
关键词
预应力混凝土叠合板
钢筋间接连接
抗弯性能
prestressed concrete composite slab
indirect connection of reinforcement
flexural performance
