基于Paris公式估算钢构件剩余疲劳寿命.通过对试件裂纹尖端应力强度因子和裂纹扩展长度的估计,用积分计算其剩余寿命.试验证明加固的钢板受疲劳载荷的过程中CFRP板能有效发挥作用且不易剥离.单侧加固和双侧加固钢板疲劳寿命分别提高了1.1倍和4.9倍.因此用CFRP加固修复疲劳载荷下的损伤构件是一种行之有效的方法.%The remaining fatigue life of steel structure is estimated by Paris formula and calculated by estimating the erack-tip stress intensity factor and crack growth rate.The analytical results agree well with ones in the fatigue tests of one-sided and double-sided reinforced specimens. So it is an effective method that CFRP composite material is used to repair the damaged members under fa-tigue loading.
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