局部锈蚀下正交异性板静力性能试验研究

Experimental study on static properties of orthotropic plates under local corrosion

为研究正交异性板局部锈蚀对静力性能的影响,通过电化学锈蚀获得不同局部锈蚀率的试验构件,对其进行静载试验。利用ABQUS有限元软件进行数值模拟,分析其承载力的退化规律。试验结果表明:局部锈蚀导致正交异性板承载力明显降低,试件破坏形式均为局部屈曲,局部锈蚀的存在导致屈曲部位有所变化;锈蚀导致正交异性板的顶板与纵肋内力及位移出现明显差异,共同受力性能降低;顶板发生锈蚀,导致正交异性板出现明显的应力集中现象,局部受力不均是导致静力性能退化的本质原因。

In order to study the influence of local corrosion on the static properties of orthotropic plates,the test components with different local corrosion rate were obtained by electrochemical corrosion.The static load test was then carried out,and the numerical simulation was performed.The degradation characteristic of bearing capacity was analyzed.The test results show that,local corrosion leads to a significant reduction in the bearing capacity of orthotropic plates.The failure mode of specimens is described as local buckling,and the existence of local corrosion leads to the change in the buckling position.The internal force and displacement of the roof and longitudinal rib of orthotropic plate are obviously different due to corrosion,and the capacity of bearing together are reduced.The obvious stress concentration of orthotropic plate is caused by the corrosion of the roof.Furthermore,the local uneven stress is responsible for the degradation of static performance.