【摘要】 碳纤维布加固混凝土结构是一种新型结构加固方法。对 4根普通钢筋混凝土梁和 3根预应力混凝土梁进行了加固后的疲劳试验研究。试验研究表明 ,碳纤维布加固的混凝土梁经 2 0 0万次疲劳后 ,强度和刚度不会降低 ,不会发生剥落和脆断现象 ,完全符合实用要求。通过理论分析 ,提出了符合铁路规范的承载力计算公式 ,计算值与试验值吻合较好。更多还原

【Abstract】 Concrete structure strengthened with carbon fiber reinforced plastic sheet(CFS) is a new retrofit method in the field of civil engineering.Three reinforced concrete beams and four pre-stressed concrete beams have been tested under fatigue load after they are strengthened with CFS. Based on experimental results, the strengthened beam′s strength and rigidity don′t decrease after 2 million fatigue loads, and the peeling and brittle rupture of sheet don′t happen, which proves the reliability of the CFS in practice. The calculation formula of bending bearing capacty of the strengthened beam that is accord with railway standard have been proposed, whose calculated values show good agreement with the experimental data.更多还原