基于位移的RC框架结构粘纤维布抗震加固分析

Displacement-based Seismic Strengthening Analysis of RC Frame Structure with Fiber Cloth

针对RC框架结构的抗震加固,以结构层间位移角为量化的性能目标,采用粘纤维布的加固方法,利用有限元软件,用Pushover分析法对加固后的RC框架结构进行了基于位移的抗震性能分析。结果表明,提出的基于位移的抗震加固分析的方法与步骤,以层间位移角为性能目标的量化方法,可以较好地评估加固后结构的抗震性能,能够有效地控制结构的变形,将加固后结构的抗震性能控制在预先设定的目标之内;采用芳纶纤维布加固后的结构能够满足结构抗震性能目标,且加固后结构在推至相应的设防水平时能够形成梁铰机制,是一种行之有效的结构抗震性能加固方法。

In view of the seismic strengthening of RC frame structure, take the structure＇ s story drift angle as the quantification performance goal, by using the reinforcement method of viscose fiber cloth, by means of finite element software, the displacement- based seismic performance analysis of the reinforced RC frame structure is carried out using Pushover analysis method. The results show that：based on the method and procedure of displacement based seismic strengthening analysis, the seismic performance of the strengthened structure can be well evaluated by the method of quantifying the story drift angle as the performance target, the deformation of the structure can be effectively controlled, and the seismic performance of the strengthened structure can be controlled within the pre- set target. The structure can meet the seismic performance target when strengthened by AFRP,and after strengthening,the structure can form a beam hinge mechanism when it is pushed to the corresponding fortification level,it is an effective method for strengthening the seismic performance of structures.