Nghiên cứu về sự phân bố nội lực trong trụ tháp, cáp chủ và cáp treo của cầu treo dây võng bất đối xứng

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Tác giả: VĂN QUÂN NGÔ, VĂN TÌNH NGÔ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2023

Mô tả vật lý: tr.84

Bộ sưu tập: Metadata

ID: 336790

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In a suspension bridge, the main girder, tower, main cable and suspender cable are the main load-bearing structures. There are usually two towers with the same height. However, in reality, the height of the two towers is not necessarily equal, depending on the Topography and Hydrology it can be asymmetry and the fact that there have been suspension bridges with asymmetrical tower heights. When that happens the distribution of internal forces, deformation, and displacement of the structures in the suspension bridge also changes. In the September 2022 issue of the Journal of Construction, the authors presented about the influence of tower height asymmetry on the distribution of internal forces of the main girder. In this paper, the author studies the influence of towers height asymmetry on the distribution of internal forces in the tower, main cable and suspender cable of a suspension bridge by analyzing the results of calculation of models of suspension bridges based on Statistical results of size, span ratio, tower height of the actual suspension bridge in the world. Using software to analyze bridge structure very popular in Vietnam is Midas/civil. Keywords: Suspension bridge
New San Francisco-Oakland bay suspension bridge
tower, main cable
suspender cable.Trong cầu treo dây võng thì dầm chủ, trụ tháp, cáp chủ, cáp treo là những kết cấu chịu lực chính. Thông thường có hai trụ tháp có chiều cao đối xứng nhau. Tuy nhiên, trong thực tế chiều cao của hai trụ tháp không nhất thiết phải đối xứng mà tùy thuộc vào địa hình và thủy văn nó có thể bất đối xứng và thực tế là đã có những công trình cầu treo dây võng với chiều cao trụ tháp không đối xứng nhau. Khi điều đó xảy ra thì sự phân bố nội lực, biến dạng, chuyển vị của các kết cấu trong cầu treo dây võng cũng thay đổi. Trong số tháng 9/2022 trên Tạp chí Xây dựng, các tác giả đã trình bày về sự ảnh hưởng của tính bất đối xứng chiều cao trụ tháp đến sự phân bố nội lực trong dầm chủ. Trong bài báo này tác giả tập trung khảo sát ảnh hưởng của tính tháng bất đối xứng chiều cao trụ tháp đến sự phân bố nội lực trong trụ tháp, cáp chủ và cáp treo của cầu treo dây võng bằng cách phân tích kết quả tính toán các mô hình cầu treo dây võng dựa trên kết quả thống kê kích thước, tỷ lệ nhịp, chiều cao trụ tháp của các cầu treo dây võng thực tế trên thế giới. Bằng cách sử dụng phần mềm phân tích kết cấu cầu rất phổ biến ở Việt Nam hiện nay là Midas/civil. Từ khóa: Cầu treo dây võng
cầu New San Francisco-Oakland bay
trụ tháp cầu treo dây võng
cáp chủ, cáp treo.

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