玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (3): 19-25.

• 基础研究 • 上一篇    下一篇

反复荷载下CFRP-PCPs复合筋混凝土梁刚度退化的过程分析

邓宇,甘德丽*,张鹏,杨希涛   

  1. 广西科技大学土木建筑工程学院,柳州545006
  • 收稿日期:2017-09-06 出版日期:2018-03-20 发布日期:2018-03-20
  • 通讯作者: 甘德丽(1992-),女,主要从事结构工程等方面的研究,2417478536@qq.com
  • 作者简介:邓宇(1978-),男,博士,副教授,主要从事结构工程等方面的研究。
  • 基金资助:
    国家自然科学基金资助项目(51768008);中国博士后科学基金项目(2017M613273XB);广西自然科学基金项目(2015GXNSFAA139263)

ANALYZING THE STIFFNESS DEGRADATION OF CFRP-PCPS COMPOSITE REINFORCED CONCRETE BEAM UNDER LOW REVERSED CYCLIC LOADING

DENG Yu, GAN De-li*, ZHANG Peng, YANG Xi-tao   

  1. Department of Civil Engineering and Architecture, Guangxi University of Science and Technology, Liuzhou 545006, China
  • Received:2017-09-06 Online:2018-03-20 Published:2018-03-20

摘要: 对6根混凝土梁进行低周反复拟静力试验,以其中1根普通钢筋混凝土梁、1根普通预应力CFRP筋混凝土梁作为对比,研究4根不同张拉控制应力、不同截面尺寸的CFRP-PCPs复合筋混凝土梁在受力过程中的刚度损伤退化规律。试验结果表明,复合筋在结构抗震中能较好地抑制构件的刚度退化。基于试验结果分析各试件在开裂点、屈服点以及极限点的刚度退化情况,得出各试件特征点的刚度退化计算方法,将计算结果与试验结果进行对比,吻合良好,为预测结构在使用过程中的变形发展情况提供一定的参考价值。

关键词: CFRP-PCPs, 刚度退化, 低周反复荷载, 混凝土梁

Abstract: In this paper, the low cyclic pseudo static test of 6 concrete beams is carried out. By using an ordinary reinforced concrete beam and a common prestressed concrete beam with CFRP reinforcement as the reference, the stiffness and damage degradation of 4 CFRP-PCPs composite beams with different tension control stresses and different sectional sizes are studied. The experimental results show that the CFRP-PCPs composite bars can effectively restrain the stiffness degradation of the structures. Based on the experimental results, the stiffness degradation of the specimens at the crack point, the yield point and the limit point are analyzed. Stiffness degradation calculation method of characteristic points of each specimen is presented. The calculated results are in good agreement with the experimental results. It will provide some reference value for predicting the development of deformation during the use of the structure.

Key words: CFRP-PCPs, stiffness degradation, low reversed cyclic loading, concrete beam

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