摘要
目的研究配置率和含钢率的变化对内置CFRP圆管的方钢管高强混凝土受弯构件力学性能的影响,为试验研究提供理论基础.方法利用数值分析的方法,采用有限元软件ABAQUS分别对9根内置CFRP圆管的方钢管高强混凝土受弯构件和3根普通方钢管高强混凝土受弯构件进行模拟对比分析.结果保持CFRP配置率不变时,受弯构件的抗弯承载力随含钢率增大而有所提高;当含钢率保持不变时,受弯构件的抗弯承载力随CFRP圆管层数的增加而增大.CFRP圆管有助于提高构件抗弯刚度,内置CFRP圆管后,受弯构件挠度曲线沿构件长度方向呈正弦半波形态.结论受弯构件中钢管与CFRP圆管具有较好的协同工作能力,内置CFRP圆管可以有效地改善方钢管高强混凝土受弯构件的力学性能.
In order to study the mechanical properties of high-strength concrete-filled square steel tubular beams with inner CFRP circular tube with finite element method and how CFRP and steel ratio affect it, nine high-strength concrete filled square steel tubular beams with inner CFRP circular tubes and three high- strength concrete filled square steel tubelar beams were analyzed with finite element software Abaqus. The moment-curvature curve and load-the strain curve were drawn by the analysis results. The analysis results show that under the condition of the same number of CFRP layers, the bearing capacity of high-strength con- crete-filled square steel tubular beam improves with increase of steel ratio. Under the condition of the same slenderness ratio, the bearing capacity of high-strength concrete-filled square steel tubular beam improves ob- viously with increase of the number of CFRP layers. Moment-curvature curve of the beam can be divided in- to elastic stage, elastic-plastic stage, softening segment and springback section. CFRP can effectively improve performance of high-strength concrete-filled square steel tubular beams.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2012年第4期670-677,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(50678106)
关键词
有限单元法
受弯构件
CFRP圆管
高强混凝土
抗弯刚度
finite element method
flexural members
CFRP circular tube
high-strength concrete
bendingstiffness
