摘要
针对混凝土与碳纤维热膨胀系数不同的特点 ,首先根据界面上变形协调与截面上内力平衡 ,导出了变温工况下混凝土梁与碳纤维内部温度应力的计算公式 ,并分析了影响温度应力的主要参数。然后针对实际问题将解析解与有限元分析结果进行对比 ,证实了利用解析方法可对温度应力进行正确的计算 ,说明了在加固设计中考虑温度应力的必要性。
Given to the continuous deformation of the interface and the internal force equilibrium of the section, the calculating formula of the thermal stress in concrete beams and CFRP is presented under temperature change in view of the different thermal expansion coefficients of concrete and CFRP. The principal parameters affecting the thermal stress are analyzed, too. Finally, the analytical solution in this paper is compared with the FEA solution through an example. The validity of work in this paper is proved, and the necessity to consider thermal stress in reinforcement design is shown.
出处
《解放军理工大学学报（自然科学版）》
EI
2003年第5期56-59,共4页
Journal of PLA University of Science and Technology(Natural Science Edition)
关键词
碳纤维
增强
混凝土
温度应力
弹性解
CFRP (Carbon Fiber Reinforced Polymer)
reinforcement
concrete
thermal stress
elastic solution
