具矽酸鈣板外覆材之冷軋型鋼牆體循環載重實驗

Cyclic Shear Test of Steel Wall Frames with Calcium Silicate Board

顧政晏(Jheng-Yan Gu)

指導教授 ： 潘吉齡

朝陽科技大學/理工學院/營建工程系/碩士(2010年)

摘要

本研究乃針對具矽酸鈣板外覆材之冷軋型鋼牆體進行循環載重實驗，對於牆體在不同厚度( 9 mm與12 mm)的矽酸鈣板外覆材，以不同的加壓方式(循環載重與直剪載重)來進行實驗比較，同時對於牆體的極限強度、延性比、能量吸收、勁度衰退、結構系統過強因子(Ω)、反應修正係數(R)及試體破壞情況進行討論。此外，本研究也對矽酸鈣板進行了彈性模數與剪力模數的實驗及冷軋型鋼鋼材的拉伸實驗，並探討這些材料的性質。
由實驗結果得知，牆體的破壞主要為槽鋼受力變形及底部槽鋼開孔破壞，直剪部分，使用雙根邊立柱的極限強度、勁度、R值都會比單根邊立柱來的高，外覆材厚度越厚所能承受的力量越高，勁度衰退也會比較慢，結構系統過強因子(Ω值)的建議值為1.5，反應修正係數(R值)的建議值2.5。

關鍵字

循環載重實驗 ； 冷軋型鋼牆體

並列摘要

This research is concentrated on the cold-formed steel wall frame sheathed with calcium silicate board under cyclic loads. Two different thicknesses of sheathing, 9 mm and 12 mm, and two types of shear load, monotonic and cyclic loading conditions, were used in the experimental study. The ultimate strength, ductility ratio, energy absorption, stiffness dissipation, overstrength factor (Ω), response modification factor (R), and failure mode for each individual specimen were discussed in this study. In addition, the material properties, such as elastic modulus of steel, as well as elastic modulus and shear modulus of calcium silicate board were also investigated in order to provide relative parameters for the analysis of wall strength.

It was observed that most specimens reached the ultimate until the bottom track was pulled out from anchor bolts due to the uplift force during the test. For the specimens under the monotonic shear load, the ultimate strength, stiffness, and R value of the wall specimens with double end studs are much greater than those with only one single end stud. It is also found from the tests that the specimen sheathed with thicker board has higher ultimate strength. The overstrength factor of 1.5 and response modification factor of 2.5 were proposed for the cold-formed steel wall sheathed with calcium silicate board.

並列關鍵字

Cyclic Shear Test ； Cold-Formed Stee Wall Frame

參考文獻

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