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碩士論文公告區 |
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| 年度： | 96 | |
| 姓名： | 林政億(Cheng-Yi Lin) | |
| 論文題目(中)： | 冷軋型鋼牆體構架具矽酸鈣板外覆材的結構強度研究 | |
| 論文題目(英)： | The Structural Strength of Cold-Formed Steel Wall Frames with Calcium Silicate Board | |
| 摘要(中)： | ||
| 本研究乃針對冷軋型鋼牆體立柱被外覆材束制的行為進行探討，試體由CS型立柱嵌入上下槽鋼所組成的構架，並以自攻螺絲束制矽酸鈣板外覆材與構架。由於立柱與外覆材相互間的支撐能力與結構行為複雜，故本研究將進行純框組構架與具外覆材框組構架實驗，利用AISI規範【1】計算預測強度與實驗數據做一比較另嘗試探討立柱的有效長度係數(K值)，並藉此計算單根立柱強度與具外覆材單位間距牆體之強度。除此之外，對於無外覆材的單根立柱將利用有限元素ANSYS分析，以模擬立柱兩端接合的行為。爲瞭解鋼材與外覆材矽酸鈣板基本力學性質，本研究亦進行一系列的材料試驗，如鋼材的材料性質試驗與外覆材相關參數試驗。 受壓試體之立柱與外覆材間的互制抵抗支撐能力，由實驗的載重-位移圖發現兩種模式，一為單峰曲線圖，其外覆材強度較弱或螺絲間距過大致使無法提供額外的抵抗支撐能力；另一種為雙峰曲線圖，其外覆材強度較強或螺絲間距較密造成立柱發生局部挫屈後，外覆材藉由自攻螺絲傳遞提供額外的支撐能力。對於具外覆材牆體構架試驗與AISI規範預測強度比較結果發現，AISI規範預測值較為保守且有效長度係數(K值)建議採用0.5。對於利用有限元素ANSYS分析均勻受壓單根立柱試體可發現，立柱破壞模式與可能破壞的位置皆和實驗相符合。 |
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| 摘要(英)： | ||
| This study is concentrated on the behavior of cold-formed steel wall frames with sheathing under axial loading condition. The wall frame is designed by using C-shaped studs and tracks which are connected running perpendicular to the top and bottom of studs. The experiments of the wall frame specimen with and without sheathing were conducted in this research due to the complexity of the interaction behavior between wall frame and sheathing. The comparisons were made between the predicted values computed based on AISI specification and tested values in order to study the effective length factor (k) utilized in the calculation of the strength of wall frames with or without sheathing. In addition, a finite element analysis software ANSYS were adopted to simulate the strength and behavior stud. In order to understand the material properties of steel and calcium silicate board, a series of material tests were conducted in this study. Two types of load-deflection curves were observed from the test results of this experimental study. One is single-peak curve which is probably caused by using thinner sheathing and larger fastener spacing. Due to the sufficient interactive strength provided by the sheathing resistance, additional loads can be taken as shown in the double-peak curve. The predicted values determined by using the AISI specification are conservative as compared to the tested values for the wall frames with sheathing. It is suggested that the effective length factor, k, can be taken as 0.5 to determine both the single stud strength and the wall stud assembly strength. In addition, the failure mode and location predicted according to the ANSYS analysis agree well with the experiments for the individual stud under axial loading condition. |
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| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0606108-163353 | |