椭圆形GFRP管高强混凝土短柱轴压力学性能试验研究  

EXPERIMENTAL STUDY ON AXIAL COMPRESSION BEHAVIOR OF ELLIPTICAL HIGH-STRENGTH CONCRETE-FILLED GFRP TUBULAR STUB COLUMNS

作　　者：王言磊[1] 张祎男 刘青 许清风 WANG Yan-lei;ZHANG Yi-nan;LIU Qing;XU Qing-feng(School of Civil Engineering,Dalian University of Technology,Dalian 116024,China;Shanghai Key Laboratory of Engineering Structure Safety,SRIBS,Shanghai 200032,China)

机构地区：[1]大连理工大学土木工程学院,大连116024 [2]上海市建筑科学研究院上海市工程结构安全重点实验室,上海200032

出　　处：《玻璃钢／复合材料》2019年第12期5-10,共6页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金面上项目(51778102);辽宁省自然科学基金项目(20180550763);中央高校基本科研业务费专项资金(DUT18LK35);上海市工程结构安全重点实验室开放课题(2018-KF04)

摘　　要：为了调查椭圆形GFRP管高强混凝土短柱的轴压力学性能,验证Teng et al.2016模型(FRP约束椭圆形混凝土应力-应变关系模型)的适用性,通过4组8个椭圆形GFRP管高强混凝土短柱试件的单调轴压试验,来考察4种截面长短轴之比对其轴压力学性能的影响,并将试验结果与Teng et al.2016模型进行对比分析。试验结果表明:椭圆形试件的破坏模式均为椭圆形截面长轴顶点附近GFRP管发生环向断裂;椭圆形GFRP管的约束可显著提升核心混凝土的抗压强度与极限轴向应变,且抗压强度和极限轴向应变随截面长短轴之比的增大而降低;Teng et al.2016模型与本文试验结果吻合得较好,表明该模型对椭圆形GFRP管高强混凝土短柱试件依然适用。In order to investigate the axial compressive behavior of elliptical high-strength concrete-filled GFRP tubular stub columns and verify the applicability of Teng et al.2016 model for the stress-strain relationship of FRP confined elliptical concrete,a total of four series of eight elliptical high-strength concrete-filled GFRP tubular stub column specimens were tested.One test parameter of the major axis-to-minor axis length ratio(abbreviated as aspect ratios),were considered in this experimental investigation.The test results revealed that the failure mode of elliptical specimens is the rupture of GFRP tube at around the apex of long axis of elliptical section.The confinement of elliptical GFRP tube can significantly improve the compressive strength and ultimate axial strain of concrete core,and the compressive strength and ultimate axial strain decrease with the increase of aspect ratios.The model of Teng et al.2016 is in good agreement with the test results of this paper,which indicates that the model can be used to predicate the behavior of elliptical high-strength concrete-filled GFRP tubular stub column specimens.

关 键 词：椭圆形 GFRP管 高强混凝土 轴压性能 

分 类 号：TB332[一般工业技术—材料科学与工程]