（1 南京林业大学土木工程学院，南京 210037； 2 东南大学混凝土及预应力混凝土结构教育部重点实验室，南京 210096；3 北京特希达技术研发有限公司，北京 100011）

［摘要］提出了绕丝加固混凝土柱的加固工艺，进行了15个混凝土柱的轴压试验，其中3个为对比试件，12个为绕丝加固混凝土柱，绕丝间距为10，20，30，40mm。试验结果表明，绕丝加固混凝土可显著提高混凝土柱的峰值应力及其对应的峰值应变，随着绕丝间距的减小，峰值应力及峰值应变逐渐增大；绕丝加固混凝土柱的破坏表现为钢丝绳的逐次分批断裂，其破坏历程长，破坏模式缓和，是一种延性的破坏。建议了绕丝加固混凝土柱的承载力计算模型，对比结果表明，建议模型计算结果与试验结果总体符合较好。

［关键词］加固; 约束混凝土; 绕丝; 轴心受压; 承载力

中图分类号：TU375        文献标识码：A        文章编号：1002-848X(2014)11-0020-05

Experiment on axial compressive behavior and calculation on load carrying capacity of concrete columns strengthened by winding steel wire ropes

Wei Yang1,2, Wu Gang2, Zhang Min3

 (1 College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China; 2 Key Laboratory for RC and PRC Structures of Education Ministry, Southeast University, Nanjing 210096, China; 3 Beijing Texida R&D Co., Ltd., Beijing 100011, China)

Abstract: The strengthening technology of concrete columns by winding steel wire ropes was provided and 15 concrete columns were tested under axial compressive test, in which 3 columns were used for comparison and 12 columns were strengthened by winding steel wire ropes with different winding spacing (10, 20, 30, 40mm). The test results show that winding steel wire ropes can significantly improve the peak stress and the corresponding peak strain of the concrete columns. The peak stress and the peak strain increase when the winding spacing decreases. The failure mode of specimens strengthened by winding steel wire ropes shows as progressive fractures of steel wire ropes in batches. The failure process is endurable and mild, and the failure behavior is ductile. The model to calculate the load carrying capacity was proposed for concrete columns strengthened by winding steel wire ropes. The comparisons indicate that the proposed model results are in good agreement with the test results.

Keywords: strengthening; confined concrete; winding steel wire rope; axial compression; load carrying capacity

*国家自然科学基金（51208262），交通部西部交通建设科技项目(201131816980),江苏高校优势学科建设工程资助项目（PAPD）。

作者简介：魏洋，博士，副教授，一级注册结构工程师，Email：wy78@njfu.edu.cn。

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