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| 摘要: |
| 忽略应力对预应力筋锈蚀的影响,将预应力筋浇筑于混凝土中,外加直流电流加速锈蚀以获取锈蚀预应力筋试件,并对其力学性能进行了研究.结果表明:随着锈蚀率的增大,预应力筋极限强度与极限应变退化;锈蚀对预应力钢丝弹性模量无影响,但钢绞线弹性模量却随锈蚀率的增大而降低.锈蚀预应力筋的本构关系可表示为双直线模型,且随着锈蚀率的增大逐渐退化为单直线,理论模型和试验曲线符合程度较高. |
| 关键词: 锈蚀预应力筋 力学性能 特征值 本构关系模型 |
| DOI： |
| 分类号:TU528.571 |
| 基金项目:国家重点基础研究发展计划(973计划)项目(2009CB623200);;西部交通建设科技项目(200631822302-01) |
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| Study on Mechanical Properties of Corroded Prestressed Tendons |
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ZENG Yan-hong GU Xiang-lin ZHANG Wei-ping HUANG Qing-hua
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| Abstract: |
| Mechanical properties of corroded prestressed tendons were considered for the durability evaluation of prestressed concrete structures.It was verified that the stress has limited effect on corrosion rate of steel wire by corrosion tests for steel wires under high tensile stress and the effect may be neglected in the accelerated corrosion test.Prestressed tendons were placed in concrete and corroded by direct current to them.Through tensile tests,the mechanical behaviors of these corroded tendons were studie... |
| Key words: corroded prestressed tendon mechanical property characteristic value constitutive model |
