鋼筋混凝土梁最大剪力鋼筋量之研究

Maximum Amount of Shear Reinforcement of Reinforced Concrete Beams

陳信福(Sinjaya Tan)

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(2010年)

https://doi.org/10.6342/NTU.2010.00179

摘要

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關鍵字

鋼筋混凝土粱 ； 剪力強度 ； 最大剪力鋼筋量

並列摘要

In current practice code, ACI 318 only recognizes single shear failure mode, which is shear tension failure in B – region because ACI 318 conservatively prevents shear compression failure by putting the empiric limitation on shear strength provided by reinforcement. This empiric limitation derives indirectly the maximum amount of shear reinforcement, which lacks of physical meaning.
In this research, twelve RC beams were tested to verify Kuo et al. model then proposed an analytical model that recognizes shear tension and shear compression mechanism. The shear tension mechanism simply follows ACI 318, while shear compression mechanism is based on Softened Strut-and-Tie. In addition, other well known analytical models, such as: Fixed-Angle Softened-Truss Model (FASTM), Simplified Modified Compression Field Theory (SMCFT), and Variable Angle Truss Model(8) are used as comparison.
Furthermore, the maximum amount of shear reinforcement of RC beams can be obtained. The proposed maximum amount of shear reinforcement has clear physical meaning which is the balance condition of failure between shear tension and shear compression. A rational general governing equation of maximum amount of shear reinforcement, which satisfies equilibrium, compatibility, and constitutive, is derived as well for the design implementation.

並列關鍵字

reinforced concrete beam ； shear strength ； maximum amount of shear reinforcement

參考文獻

1. ASCE-ACI Committee 445, “Recent Approaches to Shear Design of Structural Concrete,” American Concrete Institute, Farmington Hills, Mich, 1999, 55 pp.

2. ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary (ACI 318M-08), American Concrete Institute, Farmington Hills, Mich., 2008, 473 pp.

3. Schlaich, J., Schäfer, K., and Jennewein, M., “Toward a Consistent Design of Reinforced Concrete Structures,” PCI Journal, Vol. 32, No. 3, 1987, pp. 1375-1417.

4. Architectural Institute of Japan (AIJ), Standard for Structural Calculation of Reinforced Concrete Structures, Architectural Institute of Japan, 1999, 412 pp.

5. Kuo, W. W., Cheng, T. J., and Hwang, S. J., “Force Transfer Mechanism and Shear Strength of Reinforced Concrete Beams,” Engineering Structures, Elsevier, 2010, pp. 1537-1546.