文档介绍：河北工业大学
硕士学位论文
不同程度损伤混凝土梁加固后抗弯性能试验研究
姓名:付士峰
申请学位级别:硕士
专业:结构工程
指导教师:窦远明
20061101
河北工业大学硕士学位论文
不同程度损伤混凝土梁加固后抗弯性能试验研究
摘要
钢筋混凝土结构在其服役期间常常会受到不同程度的损伤,造成其承载力、刚度、稳
定性不断下降,使建筑物产生各种安全隐患。所以,对现有钢筋混凝土结构进行补强与加
固已经成为建筑业的一个新的热点。但是目前针对不同损伤程度的加固研究还不是很多。
本文将已受损的钢筋混凝土梁按照其初始受力的大小划分为三种损伤程度,对每种损
伤程度分别用粘钢板法、粘碳纤维布法和钢绞线加固法进行加固,使其提高到相同的承载
力水平,研究在每一种损伤程度下,这三种方法加固的钢筋混凝土梁的抗弯性能和不同的
损伤程度对每种方法加固效果的影响。
对 9 根钢筋混凝土加固梁和 1 根对比梁进行了抗弯性能的试验,通过理论分析、试验
数据分析和有限元计算分析得出:1、对于同等损伤程度的钢筋混凝土梁,在加固后,三
种加固方法对梁在抗弯性能方面的提高程度是有一定差别的;2、不同的损伤程度对粘钢
板和粘碳纤维的加固效果影响比较明显,其抗弯性能随着损伤程度的增加而降低,而对钢
绞线加固的效果影响并不明显。
本文研究成果对建筑物加固方法的选择具有一定的指导意义。
关键词:混凝土加固梁,不同损伤程度,粘钢板,碳纤维,钢绞线,抗弯性能分析
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不同程度损伤混凝土梁加固后抗弯性能试验研究
EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR
OF STRENGTHENED REINFORCED CONCRETE
BEAMS WITH DIFFERENT DAMAGES
ABSTRACT
The reinforced concrete structures are often subjected to different damages in service which
leaded to the constant declining of bearing capacity, stiffness and stability,it leads to various
dangerous problems with ,the strengthening of existing reinforced concrete
structures has e a new hot spot for the construction the reinforcement of
different degree damaged structures lack of thorough research at present.
In this paper,the damaged reinforced concrete beams were divided into three different
damages in accordance with initial load,each injury was strengthened with bonding steel
plate,sticking carbon fiber-reinforced polymer sheets and stainless steel three
strengthen methods made the beams to the same bearing capacity,the different strengthen effects
of the flexural behavior of reinforced concrete strengthened with three methods were
researched in each injury.
9 strengthened reinforced concrete beams and 1 contrast reinforced concrete beams were
tested under flexural loading. The main conculations which thought theoretical analysis,test data
analysis and finite element analysis included as follo