鋼筋混凝土剪力牆連接梁耐震配筋之研究

Study of Seismic Design for Reinforced Concrete Coupling Beams of Shear Walls

林秉誼(Pin-Yi Lin)

指導教授 ： 黃世建

國立臺灣大學/工學院/土木工程學研究所/碩士(2014年)

https://doi.org/10.6342/NTU.2014.02998

摘要

近年鋼筋混凝土建築往高層建築發展已為趨勢，而韌性連接式剪力牆系統則為常見的高樓建築核心抗側力系統。不像傳統型式的剪力牆系統，韌性連接式剪力牆可以滿足空間使用上的需求。而韌性連接式剪力牆的韌性必須建立在剪力連接梁有良好的位移能力。過去的研究顯示出剪力連接梁若要有良好的位移能力，在位移較大時需能提供足夠之抗剪強度以維持其剪力強度，如此一來則破壞型式會是較為安全的撓曲破壞。因此本研究主要經由實驗與分析方式，來探討改變斷面設計、材料性質與實驗方法之下，其剪力強度與位移能力會有何種變化。
本實驗設計了八座試體探討不同材料強度(剪力鋼筋降伏強度)、總鋼筋比、斜向對角鋼筋配置比例以及軸向束制與否對剪力連接梁之行為影響。實驗結果顯示剪力鋼筋降伏強度的提升對剪力連接梁之行為並無明顯改變。總鋼筋比的降低可有效降低斜向對角鋼筋比例，進而降低其施工困難度。對角鋼筋配置比例的提升，可有效改善剪力連接梁的位移能力。另外軸向束制會對剪力連接梁的剪力強度有顯著的提升，但同時也會使剪力連接梁的位移能力有部分降低。

關鍵字

鋼筋混凝土 ； 剪力牆連接梁 ； 剪力強度 ； 位移能力 ； 材料強度 ； 總鋼筋比 ； 斜向對角鋼筋配置比例 ； 軸向束制

並列摘要

High-rise reinforced concrete buildings can be built with the aids of the structural walls. In these cases, ductile coupled shear walls, an efficient lateral-force-resisting system, are usually placed at the core of tall buildings. As compared to the traditional shear wall system, this coupled wall system satisfies better the demand of space requirement. The ductility of coupled shear wall requires good deformation capacity of the coupling beams. According to previous researches, adequate shear strength is indispensable for the development of the ductility of coupling beams. Therefore this research focuses on the effects of shear strength and deformation capacity of coupling beams with the variation of the section design, property of material and test method.
Eight full-scale specimens were tested to study the effects of behavior of coupling beams under different property of material (yielding stress of transversal steel), steel-ratio, diagonal bar-ratio and axial constraint. Test results indicate that the increase of the yielding stress of transversal steel will not affect the behavior of coupling beams obviously. Meanwhile, it also indicates that lower steel-ratio can reduce diagonal bar-ratio effectively to improve the construction difficulty. The use of higher diagonal bar-ratio can significantly improve the deformation capacity of coupling beams. Moreover, axial constraint will make the shear strength of coupling beams significantly higher, but at the same time, it will also decrease the deformation capacity of coupling beams.

並列關鍵字

reinforced concrete ； coupling beams ； shear strength ； deformation capacity ； material strength ； steel-ratio ； diagonal bar-ratio ； axial constraint

參考文獻

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