中文摘要：

应用MATLAB提供的功能函数,确定了腐蚀钢筋初锈时间的寿命分布类型。进行了腐蚀初锈时间的分布类型判断、相关参数的极大似然估计,确定了钢筋初锈时间的概率密度函数,并绘制了各分布与腐蚀初锈时间的拟合分布及概率分布图。分析结果表明,钢筋初锈时间不拒绝服从对数正态分布,所作工作可为研究钢筋混凝土结构的耐久性概率研究提供理论参考价值。

英文摘要：

The distribution of corrosion initiation time is defined using functions of MATLAB.The estimation of distribution and the maximum likelihood estimation of parameters were performed;the probability density function was defined.The fitting between the distribution and the corrosion initiation time and the probability distribution figure was plotted. The result showed,the corrosion initiation time cannot deny the lognormal distribution,which can provide theory value for durability probability of reinforced concrete structures.