缓黏结预应力钢绞线张拉锚固后预应力损失试验研究
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摘要
为了得出缓黏结预应力钢绞线张拉锚固后预应力的变化情况,对缓黏结预应力钢绞线张拉锚固后的预应力损失做出试验研究。在试验中,通过缓黏结预应力钢绞线张拉锚固后,随着缓黏结剂固化时间的增长,读取试件两端传感器的数值,得出缓黏结预应力钢绞线的预应力损失。试验表明,张拉锚固后,锚固初期缓黏结预应力钢绞线的预应力损失较大,随着锚固时间的增长,预应力损失逐步降低。张拉锚固110d后预应力损失趋于稳定。
In order to obtain the variety of slowly-bonded pre-stressed steel strand pre-stress force after stretching anchorage, an experimental study on has been performed on the pre-stressed loss of the slowly-bonded pre-stress steel strand after stretching anchorage. In the experiment, priestess loss is obtained through tension anchoring slowly-bonded pres-tress steel strand, reading the test values at the sensor with the growth of the slow adhesive curing time.The result shows that pre-stress loss of slowly-bonded pre-stressed steel strand grows rapidly at the beginning of anchorage after stretching anchorage and the pre-stress loss decreases gradually with the increasing time of anchorage. The pre-stress loss tends to be stable when the stretching anchorage is finished in 110 days.
In order to obtain the variety of slowly-bonded pre-stressed steel strand pre-stress force after stretching anchorage, an experimental study on has been performed on the pre-stressed loss of the slowly-bonded pre-stress steel strand after stretching anchorage. In the experiment, priestess loss is obtained through tension anchoring slowly-bonded pres-tress steel strand, reading the test values at the sensor with the growth of the slow adhesive curing time.The result shows that pre-stress loss of slowly-bonded pre-stressed steel strand grows rapidly at the beginning of anchorage after stretching anchorage and the pre-stress loss decreases gradually with the increasing time of anchorage. The pre-stress loss tends to be stable when the stretching anchorage is finished in 110 days.
引文
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[2]吴转琴,尚仁杰,洪光,等.缓黏结预应力钢绞线与混凝土黏结性能试验研究[J],建筑结构,2013,43(2):68-70.
[3]熊小林,李金根,李一心.缓黏结预应力筋摩阻损失的试验研究[J].建筑技术,2008,39(12):943-946
[4]李佩勋.缓黏结预应力综合技术的研究和发展[J].工业建筑,2008,38(11):1-5
[5]王占飞,马玥,王强,等.缓黏结预应力混凝土技术在日本的研究与应用[J],公路交通科技,2014(3):192-197.