附加拱式体系的混凝土连续梁桥加固方法研究

Reinforcement Method of Additional Arch-style System for Concrete Continuous Beam Bridges

为解决连续梁桥梁体跨中下挠和开裂的问题,本文提出了在改变结构整体受力体系的前提下,通过附加结构来协调原结构的受力与变形。并以山西风陵渡黄河公路特大桥的加固设计为例,对采用附加拱式体系的加固方案来解决连续梁桥出现裂缝和下挠的问题进行研究。对这种新型的加固理念进行阐述,并通过静力与动力的计算分析对该结构体系的加固建设技术进行了有益的探讨。结果表明,采用附加拱式体系的加固方法,能够有效地解决桥梁现存病害(裂缝和下挠),并能提高结构的极限承载能力,对改善旧桥结构的安全性和耐久性具有实质性的意义。这一结论对在役桥梁的加固维修养护管理技术的提高,具有现实的指导意义。

In order to solve the problem of deflections and cracks for continuous beam bridges,innovatively the method which coordinates the force and deformation of the original structure through the additional structure under the premise of with changing the force system of the whole structure is proposed.Based on the strengthening design program of Fenglingdu Yellow River Highway Bridge,the method of additional arch-style system is researched,which can solve the issue of deflection and cracks for continuous beam bridge.The new concept of reinforcement method is elaborated and the useful discussions of reinforced construction technology for the structural system through the calculation of static and dynamic analysis is carried out.The results show that the reinforcement method of additional arch-style system can effectively solve the existing bridge diseases（cracks and deflection） and improve the ultimate bearing capacity of the structure,it had substantive significance to improve the safety and durability of the old bridge structural.This conclusion had the current guidance to improve technology for reinforcing,maintenance and management of the bridges in service.