期刊论文

Zhou, X.

中文

中国铁道科学

1001-4632

2008

29

3

34-39

10.3321/j.issn:1001-4632.2008.03.007

湖南省自然科学基金项目（06JJ21001,07JJ3100） 湖南省科技计划项目（06SK3070）

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碳纤维（CFRD）筋具有优良的物理力学性能,可作为钢管混凝土系杆拱桥中的吊索。制作CFRP吊索钢管混凝土系杆拱桥模型,对其长期受力性能进行试验研究。试验结果表明：素混凝土的徐变系数较钢管混凝土大1.14倍,加膨胀剂混凝土的徐变系数较未加膨胀剂混凝土大10%;拱桥模型在273 d持续荷载作用下,系梁的预应力损失平均值为2.4%,CFRP吊索的拉力较初始值增加29.6%-48.5%,钢管拱的表面压应变较初始值增加203%-536%;长期挠曲变形与短期变形之比分别是钢管拱2.30-2.47,系梁1.96-1.40,桥面板1.81-1.50。

Carbon Fiber Reinforced Polymer (CFRP) tendons have excellent physical and mechanical performances, which can be used as suspended cables for concrete-filled steel tubular tied arch bridge. A concrete-filled steel tubular tied arch bridge model with CFRP suspended cables was made to study its long-term mechanical behaviors. Test results indicted that the creep coefficient of plain concrete is bigger than that of concrete-filled steel tube by 114%, the creep coefficient of concrete mixed with concrete expansion agent is bigger than that of concrete without concrete expansion agent by 10%. Shrin...