Phân tích khung thép có liên kết nửa cứng phi tuyến chịu tải trọng thay đổi lặp=Analysis of nonlinear semi-rigid connections steel frames with cyclic loads

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Tác giả: Dũng Bảo Trung Lê, Hải Quang Nguyễn, Quốc Anh Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học công nghệ xây dựng (Đại học Xây dựng Hà Nội), 2024

Mô tả vật lý: tr.26-40

Bộ sưu tập: Metadata

ID: 225525

Thêm vào giỏ

Đối với khung thép, liên kết nối cột, dầm và đặc biệt là các liên kết nối dầm và cột (liên kết dầm-cột) đóng vai trò quan trọng trong phân tích kết cấu khung. Khi tính toán khung thép với liên kết nửa cứng sẽ có một mô hình phân tích gần hơn với sự làm việc thực tế của khung, nội lực phân bố đều hơn, đạt hiệu quả kinh tế cao hơn so với phương pháp tính toán truyền thống với liên kết cứng hoặc khớp. Bài báo này trình bày một phương pháp thiết lập ma trận độ cứng mới cho phần tử thanh có hai đầu liên kết nửa cứng phi tuyến. Chương trình tính được xây dựng bằng phần mềm Matlab, sử dụng phương pháp phần tử hữu hạn, tải trọng thay đổi lặp tăng dần, cho phép tiến hành khảo sát số với khối lượng tính toán lớn. Kết quả được kiểm chứng với tính toán lý thuyết và thực nghiệm đã được công bố.For the steel frames, the connection between columns, beams and especially the connections between beam and column (beam-column connections) plays an important role in the analysis of the frame structure. When calculating steel frames with semi-rigid connections, we have an analytical model closer to the actual working of the frame, internal forces are more balanced distributing, achieve higher economic efficiency than the traditional calculation method with rigid or pin connections. This paper presents a new method to establishing a stiffness matrix for a frame element with nonlinear semi-rigid connections at two ends. The calculation program was built by Matlab software, using the finite element method, the increases cyclic loads, allowing the authors to conduct numerical surveys with a large amount of computation. The results are verified with theoretical and experimental calculations that have been published.

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