鋼筋混凝土剪力連接梁耐震鋼筋配置之探討

Seismic Detailings of Reinforced Concrete Coupling Beams for Shear Walls

王亭惟(Ting-Wei Wang)

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(2011年)

https://doi.org/10.6342/NTU.2011.03344

摘要

近來鋼筋混凝土建築逐漸往高層建築發展，這是因為新技術發展之推動，其中又以剪力牆系統被廣泛使用為主因。但因為建築使用之要求，常對剪力牆開門或開窗，而造成剪力牆連接梁系統。使用對角型鋼筋配置之剪力連接梁經實驗證實，有較好的韌性行為，但是因為對角型鋼筋施工上的不易，且對角鋼筋需深入兩側剪力牆內作錨錠，因此本研究主要經由實驗與分析方式，來探討使用非對角的耐震鋼筋配置方法，來取代對角型主筋配置。
本研究共製作8座鋼筋混凝土剪力連接梁試體，其中四座為跨深比3，另四座為跨深比1。8座試體主筋排列方式皆以垂直均勻分佈為主，分別改變主筋號數與支數，及提升圍束效果，在雙曲率變形與零軸壓之狀態下，進行反覆載重試驗，以了解鋼筋混凝土剪力連接梁受側力後之行為。本實驗結果顯示，依主筋垂直均勻分佈無法改善鋼筋混凝土剪力連接梁之行為，但是，由實驗結果可知，提升混凝土圍束的效果，是可以取代使用鋼纖維混凝土之剪力連接梁。最後，本研究亦對剪力連接梁之剪力強度預測，並有效的預測模型。

關鍵字

剪力牆系統 ； 鋼筋混凝土剪力連接梁 ； 雙曲率變形 ； 垂直均勻分佈 ； 剪力強度

並列摘要

Reinforced concrete buildings in seismic zones has been limited to low-rise or medium-rise buildings worldwide, because of a lack of structural safety against earthquake. A high-rise reinforced concrete building can be built with the aids of the structural walls which provide lateral resistance efficiently. Architectural considerations usually result in window and door openings in structural walls, which divided a single wall into more slender walls connected by short or deep beams, referred to as coupling beams.
This research forcuses on the seismic behavior of coupling beams. The exrimental program is divided into two parts. The fisrt part is to test specimens with l_n⁄h=3 and the other is to deal with l_n⁄h=1. The parameters invove mainly with the different detailing of coupling beams. All specimens are subjected to double curvature bending moment were tested quasi-syatic loading.
Test results shows that the performence of specimens using vertically distributed reinforcement are not improved, but the specimens with increased confinement can enhance their post-strength behavior. This research also proposed an analytical model to predict the shear strength of coupling beam.

並列關鍵字

Shear wall system ； Reinforced concrete coupling beams ； double curvature ； Vertical distribution ； Shear strength

參考文獻

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[2] ACI Committee 318, Building Code Requirements for Structural Concrete (318-99) and Commentary (ACI318-99R),” American Concrete Institute, Farmington Hills, Mich., 1999.

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[6] Wong, P. K. C., Priestley, M. J. N., and Park, R., “Seismic Resistance of Frames with Vertically Distributed Longitudinal Reinforcement in Beams,” ACI Structural Journal, Vol.87, No.4, July-August 1990, pp. 488-498.