Kiểm tra độ bền uốn kết hợp của thép tạo hình nguội theo tiêu chuẩn AISI S100=AISI S100 to check cold-formed flexural members for biaxial bending strength

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Tác giả: Huy Hoàng Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2024

Mô tả vật lý: tr.131-135

Bộ sưu tập: Metadata

ID: 251949

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Although cold-formed steel structures have been widely used, there is no Vietnamese standard specialized for this type of structure. Cold-formed components are therefore often designed by foreign standards, such as AISI S100. The lack of standards and instructions produces mistakes in the design of cold-formed steel structures. To step-by-step compile instructions for calculating cold-formed structures, the article introduces the procedure for using the Direct Strength Method (DSM) to check the flexural members in a combination of two bendings, in which the analytical solutions are utilized. An example of a wall girt is used to illustrate the procedure. It is seen that the workload of DSM using analytical solutions is very large compared to using numerical solutions. Therefore, it needs to continue to be improved.Mặc dù kết cấu thép tạo hình nguội đã được sử dụng phổ biến nhưng ở Việt Nam hiện chưa có tiêu chuẩn riêng cho loại kết cấu này. Các cấu kiện tạo hình nguội vì thế thường được thiết kế theo tiêu chuẩn nước ngoài, ví dụ như tiêu chuẩn AISI S100 của Mỹ. Sự thiếu hụt tiêu chuẩn và chỉ dẫn dẫn đến thực trạng công tác thiết kế kết cấu thép tạo hình nguội còn nhiều sai sót. Để từng bước xây dựng hướng dẫn tính toán cấu kiện tạo hình nguội, bài báo trình bày cách kiểm tra độ bền uốn kết hợp bằng phương pháp Cường độ trực tiếp (DSM) sử dụng các công thức giải tích. Lý thuyết tính toán độ bền uốn kết hợp sau đó được minh họa bằng một ví dụ tính toán cụ thể cho xà gồ tường. Từ đó cho thấy khối lượng tính toán theo DSM sử dụng công thức giải tích còn rất lớn so với sử dụng phương pháp số, vì thế công thức giải tích cần tiếp tục được cải tiến.

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