Abstract
Single-layer reticulated shell structures are widely used, but their stability performance is not ideal. Moreover, they are sensitive to structural damage and imperfections, while the existing conventional design methods of increasing the cross-section, strengthening corrosion protection, and densifying the structural grid are not economical. This study employs a modified and bionic structure—a spiral single-layer reticulated shell structure—to solve the problem. First of all, according to the current Chinese design codes, its mathematical model and geometric model are designed. Then, its damage and imperfection tolerances are analyzed and compared with a traditional single-layer reticulated shell. We then propose a universal bearing capacity formula. Our research conclusions prove that the spiral single-layer reticulated shell structure has a higher tolerance to damage and imperfections while maintaining stability. Moreover, the precise bearing capacity formula proposed will help engineers to efficiently select the structure configurations in the conceptual design phase. Therefore, the spiral single-layer reticulated shell structure is worthy of popularization and application in engineering practice.
Highlights
Single-layer reticulated shells have been widely used in structures for their light weight, aesthetics, and ability to span large space [1]
The stability performance of single-layer reticulated shells was found to be closely related to structural imperfection and damage
The steel used for the reticulated shell structure is assumed to be an ideal elastic material, of which the elastic modulus
Summary
College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
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