轴压PVC-FRP管混凝土柱破坏机理研究

复合材料科学与工程 ›› 2014, Vol. 0 ›› Issue (11): 21-25.

轴压PVC-FRP管混凝土柱破坏机理研究

于峰^1,2*, 牛荻涛¹

1.西安建筑科技大学土木工程学院,西安 710055;
2.安徽工业大学建筑工程学院,马鞍山 243002

收稿日期:2013-12-13 出版日期:2014-11-28 发布日期:2021-09-13
作者简介:于峰(1980-),男,博士,教授,主要从事FRP在土木工程中的应用、组合结构的研究工作。
基金资助:
国家自然科学基金(50725824、51008001);安徽省自然科学基金(1208085QE88);西部建筑科技国家重点实验室(筹)开放研究基金资助(10KF03);住房和城乡建设部科学技术项目(K4201222);马鞍山市科学技术项目(马科2012(6))

STUDY ON FAILURE MECHANISM OF PVC-FRP CONFINED CONCRETE COLUMN SUBJECTED TO AXIAL COMPRESSION

YU Feng ^1,2*, NIU Di-tao¹

1. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. School of Civil Engineering, Anhui University of Technology, Ma'anshan 243002, China

Received:2013-12-13 Online:2014-11-28 Published:2021-09-13

摘要/Abstract

摘要： 通过12根轴心受压PVC-FRP管混凝土柱试验,分析PVC-FRP管混凝土柱的破坏形态与破坏机理,将荷载作用下PVC-FRP管混凝土柱受力过程分为三个阶段:弹性阶段、弹塑性阶段以及强化阶段。根据PVC-FRP管混凝土柱中核心混凝土、PVC管和CFRP条带三种材料的受力特点,将核心混凝土受力过程分为混凝土开裂前、混凝土开裂后和内力重分布三个阶段;将PVC管分为弹性阶段和弹塑性阶段;CFRP条带一直处于弹性阶段。在试验研究基础上,分别给出PVC管、核心混凝土、CFRP条带的应力路径。根据极限平衡条件,提出PVC-FRP管混凝土柱承载力简化计算方法。

关键词: PVC-FRP管, 混凝土柱, 承载力, 破坏机理, 约束

Abstract: According to the experimental study on 12 PVC-FRP confined concrete columns subjected to axial compression, the failure mode and failure mechanism of PVC-FRP confined concrete column are analyzed. The loading process of PVC-FRP confined concrete column may be divided into three sections: the elastic, the elastic-plastic and strengthening stage. Based on the material characteristics of PVC tube, core concrete and CFRP strips, the confining procedure of core concrete may be divided into three stages: preceding the crack of concrete, after the crack of concrete and the internal force redistribution. PVC tube includes the elastic and elastic-plastic stage; the stress and strain of CFRP strips are in increasing condition; the stress paths of PVC tube, core concrete and CFRP strips are presented on the basis of experimental study. The simplified calculating method of bearing capacity of PVC-FRP confined concrete column is also proposed by the condition of limit equilibrium.

Key words: PVC-FRP tube, concrete column, bearing capacity, failure mechanism, confinement

中图分类号:

于峰, 牛荻涛. 轴压PVC-FRP管混凝土柱破坏机理研究[J]. 复合材料科学与工程, 2014, 0(11): 21-25.

YU Feng , NIU Di-tao. STUDY ON FAILURE MECHANISM OF PVC-FRP CONFINED CONCRETE COLUMN SUBJECTED TO AXIAL COMPRESSION[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(11): 21-25.

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