Classical thin - walled beam theory can not handle sectional deformation.

薄壁杆件的截面变形是经典薄壁杆件理论无法描述的.

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This paper illustrates that the characteristic of thin - walled beam must be considered to study this problem.

而本文的工作说明,在研究这个问题时开口薄壁杆件本身的特性是必须加以考虑的因素.

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