单折线形体外预应力加固组合梁力学性能研究  

On the mechanical properties of single-fold external prestressed composite beams strengthened by external prestressing

作　　者：刘斌 孙强 陈信堂 苏磊 周翔 LIU Bin;SUN Qiang;CHEN Xintang;SU Lei;ZHOU Xiang(College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China;Anhui Wanda University of Information Engineering,Hefei 231201,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601 [2]安徽文达信息工程学院,安徽合肥231201

出　　处：《黑龙江工程学院学报》2020年第5期17-22,共6页Journal of Heilongjiang Institute of Technology

摘　　要：在国内,体外预应力钢板—砖砌体组合结构是1种新型加固技术,这种加固技术的主要目的是加固砖混结构建筑,将加固结构插入预应力筋,并用钢板和螺栓固定,使加固结构兼备抗压和抗拉的特点。目前,针对该加固技术的理论和试验研究还有很多不足的地方,以老旧的砖混梁为研究对象,选取单折线形布置的体外预应力加固方案,通过理论分析、试验研究和数值计算3种方法,对组合梁进行力学性能分析。研究表明:体外预应力加固技术能够显著提高组合梁的承载力,组合梁最可能破坏的位置在跨中,试验结果与数值模拟结果相差不大,都符合规范要求,验证单折线形体外预应力加固方案是可行的。In China,prestressed steel-brick masonry structure outside the structure is still a new type of reinforcement technology,and the main purpose of this reinforcement technology is to strengthen old brick-concrete structure.With reinforced structure put into prestressed structure,reinforced steel plates and bolts are used to fix the brick structure so that the reinforced structure has both compressive and tensile properties.This paper studies an old brick concrete beam from the last century and selects a single linearly arranged external structural prestressing reinforcement scheme for theoretical analysis.The research shows that the external prestressed reinforcement technology can significantly improve the bearing capacity of composite beams.The most likely location for failure of the specimen beam is in the span.The test result and numerical simulation result are not much different,both of which meet the requirements of the code and the feasibility of stress reinforcement scheme.

关 键 词：单折线体外预应力组合梁 组合梁力学性能 跨中挠度 承载力 

分 类 号：TU364[建筑科学—结构工程]