纵向分段对称非均匀锈蚀梁非线性实用分析方法

Practical nonlinear analysis method for reinforced concrete beams with longitudinally nonuniform-corroded steel bars

在纵向均匀锈蚀钢筋混凝土梁非线性实用分析方法研究的基础上,根据实际工程中受拉钢筋纵向非均匀锈蚀钢筋混凝土梁的特点,将锈蚀梁沿梁长分为三个特征区间(其中跨中锈蚀率较大为一个特征区间,梁两端锈蚀率较小各为一个特征区间),推导出双对称集中荷载作用下纵向非均匀锈蚀梁承载力及变形计算公式,建立纵向非均匀锈蚀梁非线性实用分析方法,编制Fortran计算程序,并对一实验梁进行了计算,结果表明,该实用分析方法计算结果与试验梁测试结果吻合较好,验证了所提出的非线性实用分析方法的正确性与有效性。

This paper presents a new practical nonlinear analysis method for the reinforced concrete（RC） beam that is longitudinally nonuniform-corroded.According to the corrosion features in the real cases,the corroded beam was divided into three sections along its length,i.e.a middle section of higher corrosion rate and two end sections of lower corrosion rate.Formulas were derived to calculate the bearing capacity and deformation of the corroded beam under double symmetric concentrated loads,and a Fortran code was used to analyze an experimental beam.The calculation results are in a good agreement with test data and verify the effectiveness of the new method.