小箱梁抗剪及抗弯加固措施及效果分析

Analysis of Shear and Flexural Strengthening Measures and Their Effects for Small Box Girders

改扩建工程往往面临着既有桥梁的加固,以浙江某高速改扩建项目为案例,首先分析了抗弯承载能力、抗剪承载能力、局部承压承载能力不足的原因;其次结合各自承载能力基本原理,结合规范要求,分析了加固常用方法,并对每种加固方法的原理进行了介绍;最后结合项目实际特点,介绍了所采用的方法以及加固的效果。结果表明,采用合适的加固方法可以有效解决城市高速公路桥梁的结构问题,确保了其长期安全运营。这一研究为城市基础设施的可持续发展提供了有力支持。

Renovation and expansion projects often face the reinforcement of existing bridges.Taking a high-speed renovation and expansion project in Zhejiang as a case,this paper first analyzes the reasons for the insufficient bending bearing capacity,shear bearing capacity and local loading and bearing capacity.Then,based on the basic principles of their respective bearing capacity and the requirements of specifications,it analyzes common reinforcement methods and introduces the principles of each reinforcement method.Finally,combined with the actual characteristics of the project,it introduces the used methods and reinforcement effects.The results indicate that adopting appropriate reinforcement methods can effectively solve the structural problems of urban highway bridges and ensure their long-term safe operation.This study provides strong support for the sustainable development of urban infrastructure.