Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/14599
標題: 反覆荷重下鋼筋輕質混凝土樑之撓曲行為
Flexural Behavior of Reinforced Lightweight Aggregate Concrete Beams under Cyclic Loading
作者: 黃建豪
Huang, Chien-Hao
關鍵字: lightweight aggregate concrete;輕質骨材混凝土;cyclic load;flexural behavior;ductility;energy dissipation;反覆荷重;撓曲行為;延展性;能量消散
出版社: 土木工程學系
摘要: 
本文旨在研究鋼筋輕質混凝土樑於反覆荷重作用下的撓曲行為,並與鋼筋常重混凝土樑加以比較,探討鋼筋輕質混凝土樑於不同變數下,其強度、勁度的衰減及能量消散的情形,以驗證輕質混凝土之優越耐震性。研究中共製作了44根樑試體,其變數包含混凝土強度、鋼筋比、箍筋間距及斷面尺寸等。
研究結果指出鋼筋輕質混凝土(R.L.C.)樑較鋼筋常重混凝土(R.C.)樑有較低或相同之韌性。對鋼筋比小於2.88%的樑試體,R.C.樑與R.L.C.樑,在混凝土強度增加時,韌性亦相對提升。當試體為韌性破壞時,於中、低混凝土強度等級,R.L.C.樑之強度及勁度衰減皆較R.C.樑和緩,而當試體傾向壓力破壞,R.L.C.樑之強度及勁度衰減和R.C.樑相似或較差。在能量消散方面,當試體鋼筋比小於最大鋼筋比時,混凝土強度的提升將有效提升R.L.C.樑之能量消散值,而當試體傾向壓力破壞,R.L.C.樑之能量消散值和R.C.樑一致或較差。箍筋間距的不同,對樑反覆荷重下的撓曲行為並沒有明顯的影響。

The flexural behavior of reinforced lightweight aggregate concrete beam (R.L.C.) under cyclic loading is investigated in this study. The results are compared to corresponding reinforced concrete beam (R.C.). A total of 44 beam specimens were made. The parameters included concrete type, concrete strength, reinforcement ratio, spacing of shear reinforcement and section size.
The test results show that R.L.C. beams have same or less ductility than R.C. beams. For specimens of reinforcement ratio smaller than 2.88%. Both R.L.C. and R.C. beams. increase of concrete strength will increase the ductility. For specimens of reinforcement ratio smaller than ρmax . Both at lower and higher concrete strength level, the decaying of strength and stiffness of R.L.C. beams appear milder than those of R.C. beams. By increase of concrete strength. The energy dissipation capacity of R.L.C. beams were obviously increased. When specimens were tend to compression fractured. The decaying of strength and stiffness of R.L.C. beams are similar or poor than those of R.C. beams. The energy dissipation capacity of R.L.C. beams are also similar or poor than those of R.C. beams. Different spacing of shear reinforcement have no obviously effect to the beams.
URI: http://hdl.handle.net/11455/14599
Appears in Collections:土木工程學系所

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