循环压缩载荷下裂纹板的承载力性能

Bearing Capacity Behavior of Cracked Plates under Cyclic Compressive Loading

运用非线性有限元法对循环压缩载荷下裂纹板的承载力性能进行了探讨,参数化研究了裂纹长度、裂纹分布和板厚对于裂纹板承载力性能的影响,并利用已有的实验结果验证了有限元计算结果的有效性.有限元计算结果表明,裂纹的存在显著降低了板的循环承载力性能,随着循环次数和裂纹长度的增加,双边裂纹板表现为最危险的情况.厚板的循环承载力性能优于薄板,但随着循环次数的增加,厚板的承载力下降得更快.

The bearing capacity behavior of cracked plates subjected to cyclic compressive loading was investigated according to the nonlinear finite element method.A parametric study was conducted considering the effects of the length and location of cracks as well as the plate thickness.In addition,the results of numerical calculation were verified by the existing experimental results.It is shown that the bearing capacity behavior of plates decreases significantly with the presence of cracks.The plates with double edge cracks result in the most dangerous situation as the increase of cycles and crack length.The cyclic bearing capacity of thick plate is better than that of thin plate,whereas the bearing capacity of thick plates decreases more rapidly with the increase of cycles.