Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/74744
標題: 鋼筋輕質混凝土之耐震特性評估
作者: 陳豪吉
黃中和
湯兆緯
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.
摘要: 臺灣位於地震帶上,常受到地震的侵襲,為了降低地震災害以及以提高結構物之耐震性能,根本上應從建築材料著手。鋼筋輕質混凝土具有質輕且阻尼性能佳之優點,若將其使用於建築結構上則可以提升建物的耐震能力。本文進行輕質骨材混凝土之耐震性質研究如單位重、勁度、阻尼比及自然頻率等,並與常重混凝土比較分析。由輕質骨材混凝土與常重混凝土之耐震性質比較可知,在同等強度時,鋼筋輕全骨材混凝土之單重學低於普通鋼筋凝土者20%。在一般強度(約20MPa)時,輕質骨材混凝土具有常重混凝士似之勁度及較佳之阻尼比,在較高強度(約40 MPa)時,輕質骨材混凝土具有與常重混凝土相近之阻尼比,但其勁度較佳。此外,鋼筋混凝土樑因為有埋人鋼筋的關係,其頻率與阻尼比較無筋混凝土樑低。
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.
URI: http://hdl.handle.net/11455/74744
ISSN: 1017-4397
Appears in Collections:第15卷 第2期
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