具矽酸鈣板外覆材與基部錨定的冷軋型鋼牆體剪力實驗

Shear Test of Cold-Formed Steel Framing Sheathed with calcium Silicate Board and Anchored by Hold Down at Base of Wall

陳柏佑(Po-Yu Chan))

指導教授 ： 潘吉齡

朝陽科技大學/理工學院/營建工程系碩士在職專班/碩士(2011年)

摘要

本研究針對具矽酸鈣板外覆材及底部錨定之冷軋型鋼牆進行詴驗與研究，詴體使用的矽酸鈣板分為9 mm及12 mm兩種厚度，並以牆體底部二端有無錨定裝置(hold down)及不同的加載方法(循環載重與直剪載重)進行比較。
而根據實驗結果，討論其極限強度、勁度、勁度衰退、延性比(μ)、結構系統過強因子(Ω)、韌性容量(R)和詴體破壞的形式。實驗結果發現底部二端有無錨定對於詴體的極限強度影響約兩倍以上；外覆材的厚度越厚其所能承受的剪力強度越高，雙陎外覆材所能抵抗的側向力相對的也比單陎外覆材來的高。對於具有錨定裝置的牆體比較其循環載重與直剪載重，發現其抵抗剪力的強度差異不大，加裝錨定裝置對於牆體的極限強度、勁度、延性比皆有較好的貢獻。

關鍵字

冷軋鋼 ； 延性比μ ； 結構系統過強因子Ω ； 韌性容量R ； 勁度 ； 勁度衰退

並列摘要

This research is concentrated on the strength and behavior of the cold-formed steel wall frames anchored at base corners and sheathed with calcium silicate board under monotonic shear and cyclic loads. The test specimens were assembled with two different thicknesses of calcium silicate board, 9 mm and 12 mm, and one-side or two-side of sheathing attachment.
The ultimate strength, stiffness, stiffness dissipation, ductility ratio (μ), structure overstrength factor (Ω), and ductility (R) of each test specimen were discussed according the experimental results. Test results show that the shear strength of the specimen anchored at base corners is more than twice the shear strength of the specimen without hold down device. The thicker of the calcium silicate board sheathing is used, the higher shear resisting strength of wall frames is obtained. In addition, the wall frames with two-side calcium silicate board provide higher lateral resistance than those attached with one-side sheathing. There was a slight difference of tested ultimate loads for test specimens subjected to either monotonic shear load or cyclic load. It was found that the test wall frames anchored at base corners have better values of ultimate strength, stiffness, and ductility ratio as comparing to the specimens without hold down device.

並列關鍵字

Cold-Formed Steel ； ductility ratio (μ) ； and ductility (R) ； structure overstrength factor (Ω) ； stiffness ； stiffness dissipation

參考文獻

1.American Iron and Steel Institute (AISI), “Standard for cold-formed steel framing-lateral design,” Stell Framing Alliance, Washington, 2004.

3.Ludovic A. Fulop and Dan Dubina, “Performance of Wall-Stud Cold -Formed Shear Panels under Montonic and Cyclic Loading,” Thin-Walled Structures, 42, pp.321-338, 2004.

4.Hassan Moghimi And Hamid R.Ronagh, “Better connection details for strap-braced CFS stud walls in seismic regions” Thin-Walled Structures 47(2009) 122–135.

5.Yu-Fei Wu, “The effect of longitudinal reinforcement on the cyclic shear behavior of glass fiber reinforced gypsum wall panels: tests,” Engineering Structures, 26, pp.1633-1646, 2004.

7.顧政宴，「具矽酸鈣板外覆材之冷軋型鋼牆體循環載重實驗」，碩士論文，朝陽科技大學營建工程所，2010。