连续箱梁桥体外预应力分孔主动加固施工控制研究

摘要

本文根据某连续梁桥的病害情况、受力特点，采用有限元软件midas/civil对结构进行有限元建模计算分析。通过对该连续梁桥的体外预应力加固施工全过程进行施工监控，分析比较施工中体外索的伸长量、箱梁控制截面的应力、桥梁挠度等的理论值和实测值，得出有价值的结论，用于指导工程实践。%Based on the disease situation in a continuous beam bridge, mechanical characteristics, using the finite element software midas/ civil finite element modeling of the structure calculation and analysis. Through the continuous reinforcement of externally prestressed concrete beam bridge construction monitor-ing the whole process of construction,the elongation of comparative analysis of the in vitro construction of cable, box beam control theory and measured values section of stress, deflection bridges, etc., and ob-tains valuable conclusions to guide engineering practice.