玄武岩纤维复材布加固素混凝土方柱轴压性能研究  

RESEARCH ON COMPRESSIVE BEHAVIOR OF BFRP REINFORCED CONCRETE SQUARE COLUMNS

作　　者：李涛[1,2] 黄镜渟 周安 詹炳根[1,2] 朱大勇 戴良军[3] 陈刚 

机构地区：[1]合肥工业大学,合肥230009 [2]土木工程结构与材料安徽省重点实验室,合肥230009 [3]安徽建工集团有限公司,合肥230009

出　　处：《工业建筑》2018年第2期182-187,共6页Industrial Construction

基　　金：安徽省自然科学基金项目(1408085MKL14);合肥工业大学技术开发项目(W2016JSKF0078)

摘　　要：对15根不同类型的玄武岩纤维复材（BFRP）布加固素混凝土方柱进行轴压试验研究,按照FRP层数、种类、包裹类型等参数分为5组,观察其破坏过程和破坏特点,评价BFRP对混凝土方柱承载力和延性的提高效果并基于试验数据进行ABAQUS有限元分析,验证关于FRP约束混凝土柱承载力和极限应变的现有计算模型的准确性。研究表明：BFRP加固方柱的抗压强度和延性随包裹层数的增加而提高,但提高幅度衰减,其中2层BFRP加固方柱的抗压强度和极限压应变较未约束柱分别提高约41%和144%;有限元分析的峰值压应力与试验值接近,受压本构曲线走势大致接近;引用的计算模型与试验值吻合较好且偏于安全。15 concrete square columns strengthened with different kinds of basalt fiber reinforced plastic（ BFRP） were tested under axial compression. These specimens were divided into five groups according to the parameters such as FRP layers,types and reinforcement methods. The failure process and characteristics were observed. In addition,the effects of BFRP on the bearing capacity and ductility of concrete columns were evaluated. For further analysis,the finite element models were established by using ABAQUS. Then,the accuracy of several existing computational models for calculating the bearing capacity and ultimate strain of FRP reinforced concrete column were analyzed based on the test results. The results showed that the bearing capacity and ductility of BFRP reinforced concrete square columns increased with the increase of FRP layers,but the increase amplitude was reduced,and the compressive strength and ultimate compressive strain of the two-layer BFRP reinforced square columns increased by about 41% and 144%,respectively,compared with the unconfined columns. The peak compressive stress predicted by finite element analysis was nearly close to the test results,and the constitutive curves were similar. The calculated values of the models agreed well with the test data.

关 键 词：BFRP 混凝土方柱 轴压试验 有限元分析 本构关系 

分 类 号：TU377.9[建筑科学—结构工程]