【摘要】 通过建立纤维加固RC梁的有限元模型,进行界面性能非线性有限元分析,研究了不同荷载大小,不同胶层弹性模量及厚度、不同加固形式和不同预应力大小的作用下,RC梁界面混凝土应力的变化情况。结果表明:FRP末端界面处,混凝土的剪应力和正应力得到峰值,然后随着距末端的距离增加而呈非线性减小,并接近于零。更多还原

【Abstract】 Through establishment of FE model,the interface properties of RC beams strengthened by FRP are numerically analyzed by nonlin-ear finite element method.The interface concrete stress of RC beams strengthened by pre-stressed HFRP are parametrically analyzed under the con-ditions of different load,different Young’s modulus and thickness of adhesive,different strengthened styles and different prestressed styles.The re-sults show that the shear stress and normal stress of concrete are the peak at the end of interface,and the interface stresses are reducing to zero as the distances increasing from the end of the interface.更多还原