Nghiên cứu lựa chọn hàm lượng cốt thép hợp lý cho dầm bê tông tính năng siêu cao

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Tác giả: Thị Nhung Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại: 666.8 Synthetic and artificial minerals and building materials

Thông tin xuất bản: Giao thông vận tải, 2018

Mô tả vật lý: 64-68

Bộ sưu tập: Metadata

ID: 547005

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Các công trình xây dựng dân dụng, giao thông luôn cố gắng hướng tới sử dụng kết cấu có trọng lượng nhỏ, độ bền cao, độ vượt nhịp lớn. Phát triển và sử dụng kết cấu mới cho các công trình này là yêu cầu hết sức cấp bách. Trên thế giới cũng như ở Việt Nam, bê tông tính năng siêu cao được sản xuất và sử dụng ngày càng phổ biến. Để có thể khai thác, ứng dụng vật liệu mới một cách có hiệu quả trong xây dựng, việc nghiên cứu ứng xử của cấu kiện sử dụng vật liệu này là cần thiết. Bài báo khảo sát xem xét đến việc sử dụng hợp lý hàm lượng cốt thép cho dầm bê tông tính năng siêu cao để tạo nên cấu kiện có khả năng làm việc hiệu quả. Mô hình phần tử hữu hạn bằng phần mềm MIDAS FEA được sử dụng để mô phỏng sự làm việc chịu uốn của kết cấu, có xét đến đặc điểm làm việc phi tuyến của vật liệu cũng như hình học. Kết quả mô phỏng được so sánh với kết quả thí nghiệm với mục đích kiểm chứng sự chính xác của mô hình.Civil and transport constructions are always striving towards using structures with small weight, high durability and large span. Developing and using new structures for these constructions is a very urgent requirement. In the world as well as in Vietnam, ultra-high performance concrete is increasingly produced and used. In order to effectively exploit and apply new materials in construction, the study of the behavior of components using this material is necessary. The investigative paper considers the proper use of reinforcement content for super-high performance concrete beams to create effective working structures. The finite element model using MIDAS FEA software is used to simulate the flexural behavior of the structure, taking into account the nonlinear working characteristics of the material as well as the geometry. Simulation results are compared with experimental results for the purpose of verifying the accuracy of the model.

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