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Durability life prediction of prestressed concrete structures in an erosive environment with fatigue subjoining freezing-thawing circle
Author(s): 
Pages: 79-86
Year: Issue:  3
Journal: Journal of Building Structures

Keyword:  pre-stressed concretefreezing-thawing circlefatiguelife expectancydamagedurability;
Abstract: 为探索预应力结构在侵蚀环境作用下的工作机理与寿命,研究冻融与疲劳侵蚀环境下结构疲劳寿命的主要因素及相对关系,对15根预应力混凝土梁进行了在不同冻融循环次数后的低周疲劳试验.试验结果显示,预应力张拉水平和冻融循环次数是影响预应力混凝七结构疲劳寿命的主要因素.采用损伤力学方法建立了疲劳寿命与冻融循环过程中相对动弹性模量衰减之间的关系,并建立了寿命预测模型.模型计算结果与实测结果表明,预测寿命和实测寿命...
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