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|關鍵字:||鋼筋輕質混凝土;勁度;阻尼比;自然頻率||出版社:||國立中興大學工學院;Airiti Press Inc.||Project:||興大工程學刊, Volume 15, Issue 2, Page(s) 133-141.||摘要:||
Earthquake always induces huge damages in Taiwan. To reduce the damage of earthquake and enhance the seismic resistance of structures, building materials that make up the structures should be improved. Reinforced lightweight concrete possesses lower unit weight and better damming characteristic, and using it as a building material can enhance the seismic resistance of structures. This research investigates the seismic resistant properties of lightweight aggregate concrete such as unit weight, damping ratio and natural frequency. The results are compared with those of normal weight concrete.
The test results of lightweight aggregate concrete and normal weight concrete show that the unit weight of reinforced lightweight concrete is 20% lower than that of reinforced normal weight concrete at same strength level. As the concrete strength at 20 MPa level, lightweight aggregate concrete appears larger damping ratio. The stiffness of lightweight aggregate concrete is similar to that of normal weight concrete. As the concrete strength is higher (at 40 MPa level), lightweight aggregate concrete has similar damping ratio to normal weight concrete but the stiffness is lower. Moreover, the frequency and damping ratio of reinforced concrete beam are lower than those of plain concrete beam because of the reinforcing bars effect.
|Appears in Collections:||第15卷 第2期|
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