| 摘要(英) |
The thesis follows the previous study[6], on which the hinge relocation design of Zew RC beams using additional T-head bars was discussed. This is because the shear strength increases as the moment strength was enhanced by the additional T-head bars, thus resulted in obvious diagonal shear crack and may cause sliding shear failure occur at the potential weak plane in the plastic hinge zone. Therefore, the purpose of the thesis is to study the design of RC beam sliding shear referring to the design code of NZS3101-2006. In the thesis, totally two 200 mm wide and 650 mm deep RC beams are tested and the length of beams is 2.4 meters. The longitudinal bars are arranged with two SD420 #8 in the top and two SD420 #10 in the bottom. The first tested beam NB-K1 is the prototype beam, and the second NB-K2 is the tested beam designed with a bent-up steel bar having 45 degree inclination in order to resist the occurrence of vertical sliding shear failure.
The test results show that beam NB-K1 produces sliding shear cracks when DR=2% is reached, whereas NB-K2 sliding shear cracks occur when DR=4% is started. This is because the bent-up bar breaks at DR=3%. It is expected that sliding shear may not occur if bent-up bar is not breaking. Therefore, according to the analysis on the failure possibility, it is recommended that addional vertical shear stirrups at the bend-up point could prevent the failure. It is also found that the capacity of sliding shear stipulated in NZS3101 for checking the occurance of beam sliding shear failure may not be conservative. It is suggested to revise the sliding shear capacity for the future study. |
| 參考文獻 |
[1] NZS 3101, Concrete Structural Standard, The Design of Concrete Structures & Commentary on the Design of Concrete Structures, New Zealand Standard, 2006.
[2] ACI Committee 374, Guide for Testing Reinforced Concrete Structural Elements under Slowly Applied Simulated Seismic Loads (ACI374.2R-13), American Concrete Institute, 2013.
[3] ACI Committee 374, Acceptance Criteria for Moment Frames Based on Structural Testing and Commentary (ACI 374.1-05), American Concrete Institute, 2005.
[4] ACI Committee 318, Building Code Requirements for Structural Concrete, ACI318-14 & Commentary, American Concrete Institute, 2014.
[5] Paulay, T.,& Priestley, M., J., N., Seismic Design of Reinforced Concrete and Masonry Buildings, Wiley Interscience, New York, pp. 194-199,1992.
[6] 游凱翔，「高拉力鋼筋混凝土梁塑性鉸位置外移設計之研究」，國立中央大學，碩士論文，指導教授:王勇智，民國一百零六年。
[7] 內政部營建署，「混凝土工程設計規範與解說 (土木401-100)」，民國一百年。
[8] 何立文，「高強度鋼筋混凝土梁構件耐震設計參數之研究」，國立中央大學，碩士論文，指導教授:王勇智，民國一百零五年。
[9] 中國土木水利工程學會混凝土工程委員會，「鋼筋混凝土學 (土木406-100)」，民國一百年。
[10] Moehle, J., Seismic Design of Reinforced Concrete Buildings , McGraw-Hill Education, United States of America, pp. 203-205, 2015.
[11] CSA Committee A23.3, Design of Concrete Structures for Building, Canadian Standards Association, Canada , 2004.
[12] 經濟部標準檢驗局，「混凝土圓柱試體抗壓強度試驗法(CNS 1232)」，民國九十一年。
[13] 經濟部標準檢驗局，「金屬材料拉伸試驗法(CNS 2111)」，民國八十五年。
[14] 經濟部標準檢驗局，「金屬材料之彎曲試驗法(CNS 3941)」，民國八十八年。
[15] 內政部營建署，「混凝土工程施工規範與解說 (土木402-94)」，民國九十五年。
[16] 林毅忠，「以T錨錠頭型鋼筋轉移鋼筋混凝土梁柱接頭之梁塑鉸位置」，國立雲林科技大學，碩士論文，指導教授:李宏仁，民國九十六年。
[17] Bahjat Abdel-Fattah, Wight J., K., Study of Moving Beam Plastic Hinging Zones for Earthquake-Resistant Design of R/C Building, ACI Structural Journal, Vol. 84, January-February, pp. 31-39, 1987.
[18] 楊政穎，「高拉力SD690鋼筋截斷設計之研究」，國立中央大學，碩士論文，指導教授:王勇智，民國一百零五年。
[19] Moehle, J., Seismic Design of Reinforced Concrete Buildings , McGraw-Hill Education, United States of America, pp. 203-205, 2015.
[20] 國家地震工程研究中心，「高強度鋼筋混凝土結構設計手冊」，民國一百零六年。 |
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