摘要
根据轴对称平面应变状态下厚壁圆筒的应力解法,建立了纤维布-钢管的力学模型,分析碳纤维布和钢管之间的相互作用机理,基于力学模型中环向应变相等的变形协调条件,推导了钢管在粘贴FRP后的界面压力公式,联立钢材的屈服条件求得了钢管的弹性极限内压力。对粘贴纤维布的钢管道进行静水压试验,试验结果表明:粘贴碳纤维布能有效地提高钢管的弹性极限内压力,约束管道的环向膨胀变形,并通过试验测得的管道环向应变和弹性极限内压力数据与文中的理论公式结果进行对比分析,两者吻合较好,证明了理论公式的可靠性。以界面压力公式的无量纲化形式,分析了纤维布弹性模量、管道直径和管道壁厚对纤维布粘贴钢管补强效果的影响。
According to the stress solution of thick wall cylinder in axial symmetric plane strain state, the mechanical model of FRP-steel pipeline was established to analyze the interaction mechanism between FRP and steel pipeline. Based on the deformation compatibility condition of hoop strain equivalence, the interfacial pressure equation of steel pipeline strengthened by FRP was deduced, and the elastic limit inner pressure of steel pipeline was got by combining with the yield condition of steel.Then three groups steel pipelines were tested by hydrostatic pressure experiment, the experimental result showed that FRP adhesion could improve the elastic limit pressure of steel pipeline, constrain the hooped expansion and deformation.The hooped strain of pipeline and elastic limit pressure were collected to compare with the result of theoretical equations in this paper, theoretical and experimental results were in good agreement, the theoretical formulas were reasonable.In the dimensionless form of interfacial pressure, the strengthening effectiveness of FRP strengthening steel pipeline was analyzed by elastic modulus of FRP, diameter of steel pipeline and the wall thickness of steel pipeline.
出处
《工业建筑》
CSCD
北大核心
2015年第3期174-179,共6页
Industrial Construction
基金
绵阳市科技计划项目(13G002-3)
四川省国际合作项目(2014HH0062)
关键词
纤维布
钢管道
补强效果
影响因素
fiber reinforced polymers sheet
steel pipeline
strengthening effectiveness
influence factor
