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中文摘要：
利用形状记忆合金的形状记忆效应,即在受限恢复时能产生较大驱动力的特性,配制智能混凝土梁。运用试验方法研究形状记忆合金智能混凝土梁的变形规律及其影响因素,并分析形状记忆合金对梁的驱动机理。研究结果表明：形状记忆合金能够显著提高混凝土梁的变形能力;通电激励合金恢复后,梁在合金的恢复力作用下挠度逐渐减小,裂缝闭合;增加合金的总截面面积或增加合金的初始预应变值,可提高合金对混凝土梁的驱动效果;在混凝土梁中配置受拉钢筋,虽然可以提高梁的承载能力,但钢筋的塑性变形对形状记忆合金梁的变形恢复又起到阻碍作用,会影响梁的修复效果。
英文摘要：
Taking advantage of the shape memory effect characteristic of applying large drive force to the resisting of Shape Memory Alloy （SMA）, namely, the member in the transformation of SMA on heating, smart concrete beam has been developed. Deformation law and its influence factors on the deformation behavior of SMA smart concrete beam were investigated experimentally. The drive mechanism of SMA on beams was analyzed. Research results show that SMA wires can remarkably improve the deformation capability of concrete beam. The deflection of beam decreases gradually and the crack almost closed completely under the restoration force of the alloy after electrically heating SMA wires. The drive effect of SMA wire on concrete beams can be improved by increasing the total section area or the initial pre-strain of SMA wire. Tensile reinforcing steel bars are embedded in concrete beams, which can improve the bearing capacity of beams. However, the plastic deformation of reinforcing steel bars plays a rather negative role in the restoration process of SMA beams, which will affect the restoration effect of beams.
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