高強度鋼筋混凝土剪力牆連接梁耐震行為研究

Study on Seismic Behavior for High Strength Reinforced Concrete Coupling Beams of Shear Walls

楊善淳(Shan-Chun Yang)

指導教授 ： 林至聰 ； 林敏郎

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2013年)

https://doi.org/10.6841/NTUT.2013.00643

摘要

鋼筋混凝土剪力牆為公認有相當卓越之優良抗震構材之一，其主要的優點為增加建築物對水平剪力的承載能力，使得整個建築在横向上更加有韌性，而地震最主要的影響就是對建築結構的橫向毀壞。但由於地下停車空間樓梯間、通道、電梯井或是管線通過之需求，剪力牆系統經常需要開孔，所以剪力牆系統需要連接梁(Coupling Beam)做連結以滿足空間使用上的需求，之前的研究發現配置對角向鋼筋的連接梁，通常比傳統直通配筋形式的連接梁擁有更好的韌性行為，但由於ACI 318-11規範規定跨深比 之連接梁必須配置對角鋼筋，因其配置對角鋼筋籠的形式容易造成施工困難，導致施工品質不佳。
因此為了兼具施工性與良好的結構行為，本研究除了提出取消對角鋼筋籠的方式，改以簡化鋼筋籠配筋方式增大其對角鋼筋之 角度，增強連接梁之塑角區之抗剪分量，另外在材料方面則使用的新型之高強度材料，期望以高強度之鋼筋混凝土於連接梁之試驗上能夠增強其強度與韌性行為發展，並以高強度鋼纖維以一定比例摻入混凝土中，藉此希望更進一步提升短跨度連接梁之韌性，希望使連接梁的破壞模式會是較安全的撓曲破壞。
本研究共製作九座鋼筋混凝土剪力連接梁試體，經由雙曲率變形與零軸壓之狀態下，進行反覆載重實驗與分析方式來探討在高強度材料下，不同跨深比、配筋細節與材料變化下於剪力連接梁之耐震行為與韌性發展，另外也在高強度材料下針對ACI 318-11規範、ASCE/SEI 41-06、FEMA 306、拉壓桿等強度估算公式與斷面分析軟體XTRACT預測其撓曲強度與連接梁之實驗結果進行探討與檢核。

關鍵字

高強度鋼筋混凝土 ； 剪力牆系統 ； 鋼筋混凝土 ； 剪力強度 ； 鋼纖維混凝土 ； 雙曲率變形 ； 跨深比 ； 韌性

並列摘要

Ductile coupled shear wall is the best seismic girders, the results of the seismic is outstanding, making the structure of the building effective against devastating earthquakes. It is advantage is the increase of the building is resistance against horizontal shear force. To describe more specifically, ductile coupled shear wall increase the toughness of the whole building on the horizontal axis, and the main damage of earthquakes are on the horizontal axis.
Because of the need of underground parking lot, holes are needed to be drilled through ductile couple shear wall for the use of stairwells, passages, and elevators. So the ductile couple shear system is needed to be connected by coupling beam to fulfill the needs of space. The research before found that the configuration of reduced diagonal reinforcement are tougher than the traditional Conventional coupling beam. However the construction of the reduced diagonal reinforcement is difficult to accomplish, causing the quality of the construction poor. Therefore, to ensure both the easiness of the construction and the toughness of the structure, this study not only proposed a way to simplify paired diagonal bar, but also used high strength materials and used high strength steel fibers mixed in a specific ratio with concrete hoping the connecting beam would break in a safer flexural failure, and observe the development of the strength and toughness.
In this study, nine reinforced concrete ductile couple shear wall are made as specimens. The experiment was carried out through the morph of dual-zone rate and the condition of without applying axial force after numerous times of loading experiment and analytical methods to investigate different aspect ratio and different component details of reinforced ductile couple shear wall and the increase of seismic and toughness of high strength materials. In addition, this study also checked the estimated formula of ductile couple shear connection coupling beam under the specification of ACI 318-11.

並列關鍵字

high-strength reinforced concrete ； coupling beam ； Steel fiber ； apect-ratio ； double curvature ； ductile

參考文獻

[15] 張于軒, ”鋼筋混凝土剪力牆連接梁鋼筋配置之研究” ,碩士論文,國立台灣大學土木工程系,台北,民國101年。

[2] Paulay, T.,“EERI Distinguished Lecture 1997 Professional Commitments to Earthquake Engineering” Earthquake Spectra, Vol. 14, No. 4, November 1998.

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

[5] ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-02) and Commentary(ACI 318R-02), American Concrete Institute,Farmington Hills, 2002.

[6] ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-05) and Commentary(ACI 318R-05), American Concrete Institute,Farmington Hills, 2005.