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首页> 外文会议>International Structural Engineering and Construction Conference(ISEC-03); 20050920-23; Shunan(JP) >A simple estimation method of bending strength for corroded plate girder
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A simple estimation method of bending strength for corroded plate girder

机译：锈蚀板梁抗弯强度的简单估算方法

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摘要

Although it is difficult to estimate the remaining strength of the corroded members correctly, it is very important problem in order to actualize the proper maintenance for steel structures. In this paper, a simple estimation method of the remaining bending strength was proposed for corroded plate girders. The bending test of the scrapped plate girders were carried out focusing attention on the torsional buckling of compressive flanges. The following conclusions were obtained from the experimental results: (1) A simple estimation method based on the beam theory was proposed for bending strength of corroded plate girder. The ultimate strength of corroded flanges can be estimated by the representative thickness t_R = t_(avg) + 2σ_t, where t_(avg) = average thickness, and σ_t = standard deviation of flange thickness. (2) The bending strength would be decreased about 20～24% than that of the corrosion-free girder.
机译：尽管很难正确估计腐蚀构件的剩余强度，但是对于实现钢结构的适当维护来说，这是一个非常重要的问题。在本文中，提出了一种简单的估计板梁剩余抗弯强度的方法。报废的板梁的弯曲试验的重点是压缩法兰的扭转屈曲。实验结果表明：（1）提出了一种基于梁理论的锈蚀板梁抗弯强度简单估算方法。腐蚀法兰的极限强度可以通过代表性厚度t_R = t_（avg）+2σ_t进行估算，其中t_（avg）=平均厚度，而σ_t=法兰厚度的标准偏差。 （2）抗弯强度比无腐蚀梁降低约20〜24％。

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