钢筋混凝土框架结构自复位加固研究

The Research on Self-centering Reinforcement Method for Reinforced Concrete Frame Structure

为减小结构震后残余位移,提高框架结构的震后可修复性,本文提出1种自复位耗能加固方法。以一典型框架结构为例,对比传统框架结构和采用自复位耗能装置加固框架结构的地震响应,并研究自复位耗能装置各参数对加固后结构抗震性能的影响。结果表明:采用自复位耗能装置加固框架结构可有效减小残余位移,但有可能增大结构内力响应;结构的残余位移随着弹簧刚度的增大而减小,结构的内力响应也随之增大;预拉力越大,结构内力响应增加越小,在实际工程中应对自复位加固装置的弹簧刚度和预拉力进行优化以获得最优的自复位加固效果。

In order to reduce the residual deformation of the structure after earthquake and improve the reparability of the frame structure after earthquake, a self-centering energy dissipation technique is proposed in this paper. Taking a typical frame structure as an example, the seismic response of the traditional frame structure and the frame structure with additional self-centering energy dissipation device is analyzed, and the influence of the parameters of self-centering energy dissipation device on the seismic response of the frame structure is studied. The results show that the reinforcement of frame structures with self-centering energy dissipation technique can effectively reduce the residual deformation, but it may increase the internal force response of the structure. The residual displacement of the structure decreases with the increase of spring stiffness, and the internal force response of the structure increases. The bigger the pre-tension force is, the smaller the internal force response of the structure increases. In practical engineering, the spring stiffness and pre-tension of the self-centering reinforcement device should be optimized to obtain the optimal self-centering reinforcement effect.