体外预应力加固的技术研究

摘要

Based on the ANSYS finite element model, this paper studies the external tendon and the key technologies of the external prestressed reinforcement. The conclusions are as follows. To a rational function position of the external tendon, the original structure's stress condition must be complied as far as possible to ensure the safety performance of the reinforcement. The reinforcement tendon should use the replacement principle of equivalent area, for the reasonable construction process. The strength tendon's junction device must keep the principle of "conformation, thin, strong". The engineering disposal of longitudinally and staggered layout for the external tendon in reinforcement engineering, which will promote the integral structure ductility.%通过ANSYS有限元模型,以体外预应力筋为研究对象,对体外预应力加固的关键技术进行了研究,得出体外预应力的作用位置,尽可能拟合原结构的受力状况,保证加固工程的安全性;体外预应力的补强力筋,应采用等效面积的置换原则,使施工的过程趋于合理;体外力筋的连接装置,应该"适、薄、强";在加固工程中,体外预应力筋纵向交错布筋的设置,能提升结构的整体延性.