摘要
为研究准静态压缩下微珠泡沫填充玻璃纤维增强聚合物(GFRP)十字格构柱的力学性能,本研究设计了8个GFRP包裹微珠泡沫组合柱,分析了微珠泡沫密度、纤维纵横向比及GFRP十字格构层数对组合柱极限承载力及破坏形态的影响。研究结果表明:准静态压缩下微珠泡沫填充GFRP十字格构柱表现出延性破坏,破坏过程经历弹性、塑性及压缩密实三个阶段,吸能效果良好;随着纤维纵横向比、GFRP十字格构层数和泡沫密度的增加,试件在准静态轴向压缩下的极限承载力、弹性阶段刚度均得到提高。建立了三维有限元模型对试件在准静态压缩下的性能进行的仿真分析与试验吻合较好。
To study the quasi-static compression behavior of glass fiber reinforced polymer(GFRP)cross-grid columns filled with micro-bead foam,several load carrying structural columns with a GFRP composite shell encasing asyntatic foam core were designed by our research group,The structural responses of column speimens were assessed via load and strain.The following parameters were varied to induce different failure modes:(1)syntactic foam density;(2)fiber volume percent in both the longitudinal and circumferential directions;(3)layer number of cross-shaped GFRP web.All the test specimens wrapped with GFRP exhibited a three-phase load-displacement response:linear-elastic phase,postcrushing phase and foam compaction phase.which indicates a good energy absorption capability of the column.The ultimate bearing capacity and stiffness in the elastic stage of the specimen under quasi-static axial compression were improved with the increase of fiber volume percent,layer number of cross-shaped GFRP web and syntactic foam density.A three-dimensional finite element model was developed to simulate the performance of specimens under quasi-static compression.The numerical results are in good agreement with the experimental results.
作者
张洋
李俊杰
王俊
何文涛
ZHANG Yang;LI Junjie;WANG Jun;HE Wentao(College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2020年第6期924-927,994,共5页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(51578285)
江苏省建筑产业现代化科学支撑资助项目(2016-13)。
关键词
复合材料
微珠泡沫
准静态
十字格构
有限元分析
Composites
Micro-bead foam
Quasi-static
Cross-shaped GFRP web
Finite element analysis
