BFRP约束混凝土短柱轴压性能的截面尺寸效应研究  

STUDY OF THE SECTIONAL SIZE EFFECTS OF AXIAL COMPRESSION PERFORMANCE OF CONFINED CONCRETE SHORT COLUMNS WITH BFRP SHEETS

作　　者：刘华新[1] 孙英明[1] 王学志[1] 邢宪才[1] 柳根金 

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121000

出　　处：《玻璃钢／复合材料》2014年第10期21-26,共6页Fiber Reinforced Plastics/Composites

基　　金：辽宁省高等学校优秀人才支持计划(LR2012020);辽宁省教育厅基金(L2011103);辽宁省百千万人才千人层次项目(2011921059)

摘　　要：为了研究BFRP约束不同截面高宽比混凝土短柱轴压性能,进行了五种不同截面高宽比BFRP约束混凝土短柱的轴心抗压试验。按照截面高宽比、包裹层数,试件分15组,每组3个相同试件。结合试验结果,通过理论分析和数值模拟研究试件的轴心抗压强度、峰值应变及应力-应变关系。研究结果表明,各组试件的裂缝开展和破坏形态基本一致;截面高宽比不同试件的轴心抗压强度存在明显的截面尺寸效应;峰值应变随试件截面高宽比的变化比较离散,没有明显的规律;建立的强度模型与试验结果吻合较好;采用ANSYS分析软件能较好地模拟BFRP约束混凝土短柱的轴压性能。In confined concrete order to study the axial compression performance, five different section height to width ratio of rectangular short columns with BFRP sheets were characterized by axial compressive test. According to section height to width ratio and the layers of BFRP sheets, all specimens were divided into 15 groups, and every group has 3 specimens. The axial compressive strength, peak strain and stress-strain relationship of all specimens were also investigated by the theoretical analysis and numerical simulation. The results indicate that crack development and damage morphology are basically the same in each group. For the axial compressive strength of the specimens in each group, there is an obvious cross-sectional size effect. With the changes of specimen cross-sectional aspect ratio, peak strain is relatively discrete. The strength model agrees well with the experimental results. And the axial compressive strength of confined concrete short column can be well simulated by using ANSYS finite element analysis software.

关 键 词：截面高宽比 尺寸效应 轴心抗压强度 峰值应变 数值模拟 

分 类 号：TB332[一般工业技术—材料科学与工程]