Effects of different factors on the length of damage domain of H-section steel plate shell segment under biaxial loading
In order to study the influence of the four main parameters of axial compression ratio,slenderness ratio,web height thickness and flange width thickness ratio on the damage domain length of H-section steel members under biaxial loading,the finite element software ABAQUS was used to establish the plate and shell model for finite element simulation analysis,and the calculation formula for calculating the damage domain length of plate and shell segments under two-way loading was given.The analysis results showed that the two-way loading was more in line with the actual situation,and the length of the damage region was too large,thereby improving the accuracy of the values of plate and shell segments;In a certain area,the length of damage zone was positively correlated with axial compression ratio and the web height to thickness ratio,and the growth rate can reach more than twice the initial value,while it is negatively correlated with the flange width-to-thickness ratio,with a maximum reduction of over 50%.When the slenderness ratio was less than the critical value,there was a negative correlation between them,with a maximum decrease of 34.28%;On the contrary,there was a positive correlation between them,with a maximum increase of 58.26%.
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