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北京工业大学学报 2010

多级等幅疲劳加载下RPC的损伤累积及剩余寿命预测

Keywords: 活性粉末混凝土,疲劳试验,损伤累积,剩余寿命

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Abstract:

为了进行活性粉末混凝土(reactivepowderconcrete,RPC)结构的疲劳寿命分析,对轴向循环压缩荷载作用下RPC的损伤累积行为进行了试验,利用残余塑性应变定义了RPC的疲劳损伤,给出了损伤演化方程.基于等效损伤准则,导出了反映RPC非线性损伤累积的力学模型,利用模型进行了RPC的剩余疲劳寿命预测.结果表明,理论损伤累积模型能较好地预测RPC的剩余疲劳寿命.

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