【摘要】 以英国桥梁BS5400规范中的桥梁铆接结构在给定失效概率下的疲劳寿命分析方法为基础,参考我国五十年代初期的实际情况,建立铆接钢桥的疲劳寿命分析模型。结合用雨流计数法处理的实测桥梁运营应力谱和M iner线性累积损伤原理对南京长江大桥主要构件的疲劳寿命进行估算。更多还原

【Abstract】 Based on the analysis method of fatigue lifespan at given value of failure probability for riveted components of the bridge in BS5400 UK standard,and referring to the actual situation in early stage of 1950s,the fatigue lifespan evaluation models of old riveted bridges are established.On this basis,the fatigue lifespan of main components of the Nanjing Yangtze River Bridge is estimated using the stress spectra obtained by rain-flow counting method and the Miner-Palmgren linear damage accumulation principle.更多还原