本研究設計並製作16支超高性能纖維混凝土矩形拉伸硬化試體與10支超高性能纖維混凝土簡支梁試體，研究參數包含:1)纖維量，與2)縱向鋼筋比，透過直接拉伸實驗，探討超高性能纖維混凝土拉伸硬化試體之行為；透過四點彎矩實驗，探討超高性能纖維混凝土撓曲行為，並建立超高性能纖維混凝土撓曲強度之預測公式。
研究結果顯示，縱向鋼筋比之對於超高性能纖維混凝土拉伸硬化行為沒有影響，加入鋼纖維能夠有效提升拉伸硬化能力。
本研究建立之撓曲強度預測分析模型，能夠有效的模擬拉伸硬化之行為對於簡支梁撓曲強度之影響，模型分析之撓曲強度與簡支梁實際之撓曲強度誤差範圍為-5％至+8％。

Sixteen Ultra High Performance Fiber Reinforced Concret(UHPFRC) tension tiffening specimens and ten UHPFRC simply supported beam specimens are designed and produced for this study. The design parameters include: 1) the amount of the fiber , and 2) longitudinal reinforcement ratio. Direct tensile tests are carried out to evaluate the behavior of UHPFRC tension stiffening specimens, and four point bending flexural tests are carried out to evaluate the flexural behavior of UHPFRC flexural members. An analytical method is described to predict the flexural strength of UHPFRC to bending,The test results show that longitudinal reinforcement ratio has no effect on tension stiffening behavior, and the fiber significantly enhances the tension stiffening ability. The results show that UHPFRC flexural members have superior flexural characteristics, and the calculated ultimate moment model was in good agreement with the experimental ultimate moment capacity, error range of -5% to + 8%.

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