| 摘要: |
| 对相同混凝土配合比的5组混凝土柱（1组全黏结SMA（形状记忆合金）驱动混凝土柱，1组半黏结SMA驱动混凝土柱，1组无黏结SMA驱动混凝土柱，1组全黏结SMA未驱动混凝土柱，1组素混凝土柱）进行了轴压试验研究，比较分析了5组混凝土柱的纵向应变、横向应变、极限荷载、裂现荷载等轴压性能.结果表明：SMA混凝土柱抗裂性能大小顺序为：半黏结SMA驱动混凝土柱>全黏结SMA驱动混凝土柱>无黏结SMA驱动混凝土柱>全黏结SMA未驱动混凝土柱；SMA混凝土柱的极限荷载大致相等，并且都比素混凝土柱大；SMA螺旋箍筋与混凝土半黏结将有利于SMA螺旋箍筋对混凝土柱施加预应力；可利用SMA螺旋箍筋对混凝土柱施加较大的预应力，实现对混凝土柱的变形控制. |
| 关键词: 驱动 混凝土柱 形状记忆合金 黏结条件 轴压试验 预应力 |
| DOI：10.3969/j.issn.1007 9629.2013.04.028 |
| 分类号: |
| 基金项目:重庆市自然科学基金资助项目（CSTC2005BB6116） |
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| Axial Compression Experimental Study of Shape Memory Alloy(SMA)Actuating Concrete Column at Different Bond Conditions |
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YU Zhi gang1, HAN Xi2, ZHONG Li2, YIN Ke1
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1.College of Civil Engineering, Chongqing University, Chongqing 400045, China;2.School of Civil Engineering and Architecture, Chongqing Jiaotong University, Chongqing 400074, China
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| Abstract: |
| Axial compression experiment for the bonded SMA actuating concrete column, semi bonded SMA actuating concrete column, unbonded SMA actuating concrete column, bonded SMA unactuating concrete column and concrete column with same concrete mix proportion were carried out. The axial compression properties of five groups of concrete column, including longitudinal strain, transverse strain, limit load and crack resisting load were compared. The results indicate that crack resistance of SMA concrete columns progressively decreases in the sequence of semi bonded SMA actuating concrete column, bonded SMA actuating concrete column, unbonded SMA actuating concrete column and bonded SMA unactuating concrete column. The limit load of SMA concrete columns are approximately equal, and greater than that of concrete columns. Semi bond between SMA spiral stirrup and concrete column will favor that SMA spiral stirrup induces the prestress on concrete column. SMA spiral stirrup can be utilized to induce the larger prestress on concrete column，and finally to realize the deformation control for concrete. |
| Key words: actuation concrete column shape memory alloy(SMA) bond condition axial compression experiment prestress |
