【摘要】 为弥补现有碳纤维布加固梁体的不足,提出利用体外预应力进行反拱法预应力碳纤维布加固普通钢筋混凝土梁,推导其计算公式,并通过实例计算验证了该加固方法的有效性。结果表明,加固后梁体的刚度是加固前的2.77倍;梁体跨中截面的开裂弯矩则是加固前的2.11倍。更多还原

【Abstract】 The mechanism of using prestressed carbon fiber reinforced plastics( Pre-CFRP) sheet to strengthen reinforced concrete beams with anti-arch deflection method was proposed. And then the corresponding theoretical analysis was derived,and the effectiveness of this reinforcement method was verified by an example calculation. In this example,the stiffness of the strengthened girder is 2. 77 times of the reinforcement girder,and 2. 11 times for the cracking moment. So,Pre-CFRP can improve the use function greatly.更多还原