预应力包钢法加固钢筋混凝土梁抗剪性能的试验研究  

Experimental Study of Reinforced Concrete Beams Strengthened by Profile Steel and Prestressed Bolt

作　　者：刘敏[1] 关建光[2] 徐福泉[2] 师瑜莹 

机构地区：[1]核工业第二研究设计院,北京100840 [2]中国建筑科学研究院建筑结构研究所,北京100013 [3]中国中元兴华工程公司,北京100081

出　　处：《工程抗震与加固改造》2006年第5期49-54,共6页Earthquake Resistant Engineering and Retrofitting

摘　　要：预应力包钢法是在混凝土构件四周包以型钢,采用高强螺栓对外包钢施加双向水平预应力的一种先进的加固新技术。本文主要介绍了七根钢筋混凝土梁在静载作用下受力性能的试验研究。验证了采用预应力包钢法提高钢筋混凝土梁剪切开裂荷载和受剪承载力的有效性,并讨论了影响此种加固方法的各种因素。在此基础之上,本文提出了预应力包钢法加固钢筋混凝土梁斜截面抗裂度和受剪承载力计算公式,与试验值符合较好。The strengthened method using profile steel and prestressed bolt means that concrete beam is strengthened around its section by bonding profile steel and prestress is applied by high-tension bolt, which is a new advanced strengthening technique. The test of seven reinforced concrete beams loaded by dead-load is mainly introduced. The crack resistance and shear capacity of the strengthened beams are increased effectively. Various influencing factors are discussed. Based on this, the formulas for calculating cracking load and shear capacity of reinforced concrete beams strengthened by profile steel and prestressed bolt are proposed, which are coincidence with the test value.

关 键 词：螺栓 加固 预应力 钢筋混凝土梁 开裂荷载 受剪承载力 变形 

分 类 号：TU375.1[建筑科学—结构工程]