体外预应力结构计算的接触分析方法

提出采用接触分析方法进行体外预应力结构的计算模拟。同时，为验证此方法的可行性，依据相关试验参考文献资料数据，建立对应的有限元结构分析模型，采用有限元分析接触单元法和原普遍采用的共用结点法，分别对梁体进行数值模拟计算，结果表明，接触单元法具有更好的计算精度和准确性。而后，采用接触单元法针对不同体外预应力筋线形布置情况进行接触模拟计算，找到加固效果最好的体外预应力筋布设位置。

The Contact Analysis Method for External Prestressed Structure Calculation

In this paper,the contact analysis method for the simulation calculation of external pre-stressed structure.At the same time,to verify the feasibility of this method,based on the related experi-ment reference data,to establish the finite element structure of the corresponding analysis model,the common node method using the finite element analysis of contact element method and widely used,re-spectively,of the beam was calculated by numerical simulation,results show that the calculation preci-sion and accuracy,the contact element method has the better.Then,using the contact element method according to the different external tendons linear arrangement contact simulation,find the best reinforce-ment effect of externally prestressed tendon layout position.