【作者】 王斌；

【导师】 赵少伟；

【作者基本信息】 河北工业大学 ， 结构工程， 2010， 硕士

【摘要】 粘贴钢板、玻璃纤维、碳纤维等材料是结构加固中一种较为简便的加固形式,近年来被广泛地应用于工程实际中,尤其以粘贴碳纤维为研究和应用的热点。并主要研究粘贴加固抗弯构件正截面刚度计算的通用公式。本文主要对碳纤维加固矩形截面钢筋混凝土梁抗弯刚度进行了相关的研究。本次试验共采用了十二根相同截面尺寸试验梁,包括四根对比梁,四根粘贴两层碳纤维布梁,四根粘贴三层碳纤维布梁。主要考虑加固量的影响因素,试验梁均采用三分点弯曲静力加载。试验表明,碳纤维布粘贴加固可以大幅度提高钢筋混凝土梁的抗弯刚度。依据黏贴碳纤维加固梁截面刚度变化规律,对试验数据进行统计分析,由此推导出加固梁短期刚度计算公式,该公式精度较高。更多还原

【Abstract】 Strengthening reinforced concrete structure with externally-bonded steel plate, glass fiber, carbon fiber, steel mesh and so on, which is a simple and convenient method in direct reinforcement, is widely applied to engineering in recent years, especially carbon fiber is the focus of research and application.This study investigates the flexural stiffness of rectangular beams strengthened with externally bonded carbon fiber sheets. Twelve same rectangle section rectangular beams were constructed, four contrast beams, four strengthened beams with two carbon fiber sheets and four strengthened beams with three carbon fiber sheets. Main considered in strengthening ratio. All these strengthened rectangular beams are statically loaded under third-point bending. Structural testing of the beams shows that carbon fiber strengthening can highly increase flexural stiffness.A formula for calculating the short-term stiffness of reinforced concrete beams strengthened with carbon fiber has been established on the basis of analyzing the law of changes in the sectional stiffness of these beams and through a statistical analysis of the test data. The formula has a higher precision.更多还原