| 姓名 | 鍾秉璁(Ping-Tsung Chung) | 電子郵件信箱 | thor63@ms55.hinet.net | |
| 畢業系所 | 營建工程系碩士班(Department and Graduate Institute of Constrction Engineering) | |||
| 畢業學位 | 碩士(Master) | 畢業時期 | 90學年第2學期 | |
| 論文名稱(中) | 具腹板開孔之C型冷軋型鋼受壓強度研究 | |||
| 論文名稱(英) | The Compressive Behavior of C-Shaped Cold-Formed Steel Members with Web openings | |||
| 檔案 |
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。 |
論文使用權限 | 校內外完全公開 | |
| 論文語文/頁數 | 中文/75 | |||
| 摘要(中) | 近二十年來冷軋型鋼結構(Cold-Formed Steel
Structures)已在世界各國多方應用於房屋、橋樑、輸電高架、公路設施等方面。由於冷軋型鋼之厚度薄、重量輕，仍然可提供足夠之承載能力，因此冷軋型鋼的發展亦有其重要性。 而冷軋型鋼之設計乃採用有效斷面面積(effective sectional area)之觀念，所有受壓肢材(compression element)之承載能力皆須依據有效面積方式計算。受壓肢材之有效寬度除了與其自身幾何形狀有關外，亦受到兩側之加勁狀態有所影響。如受壓構材內又有開孔之情形，則在計算有效寬度時亦顯得複雜，而腹板開孔在工程上的意義，乃是為了易於架設橫支撐或管線通路，因此構材為腹板開孔的C形斷面具有相當程度研究的動機與意義。不過，構材之厚度、加勁與未加勁、是否開孔、上下兩端之接合方式，皆會影響受壓構材之抗壓能力，所以目前先針對C形斷面構材的開孔與否及上下兩端之接合方式，分別以兩種尺寸來討論，並藉由有限元素分析軟體ANSYS 6.0版，來模擬構件受壓時，斷面的應力分佈情形。 由實驗的結果及分析可知，AISI規範(1996)對於腹板開孔的C形斷面之預測強度有高估的現象。且試體挫屈時，所發生的扭轉變形方向亦會影響斷面的應力分佈。 | |||
| 摘要(英) | Recently, the
cold-formed steel has been considerably adopted in the construction of
steel structures such as buildings, bridges, transmission towers, and
highway products due to the demand of market. Even the thickness of
cold-formed steel is quite thin as compared to the structure-used steel,
the cold-formed steel structure can still take sufficient load-carrying
capacity. Therefore, the development of cold-formed steel structure
plays a very important role in the recent and future construction
field. The concept of effective sectional area is adopted in the design of cold-formed steel members. Based on the design effective width, the load-carrying capacity of compression element can be calculated. In addition to the geometrical shape factor, the effective width of compression element can be affected by the stiffened conditions at its two sides. It will be more sophisticated in the computation of the member strength for the section with openings. The web perforation can provide space for electrical conduits and bracing. Therefore, it has the meanings and motive for the study of C-shaped section with web openings. The strength of a compression member can be influenced by the section shape, thickness of section, length of member, and support condition. This study is concentrated on the affect of web perforation and the support condition. The finite-element software ANSYS 6.0 was conducted in this research. The comparisons will be made between the calculated values and experimental results. The prediction according to AISI-Code seems to be overestimated as compare to the test results. It was also found that the stress distribution in the compression member can be affected by the type of overall buckling. | |||
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