With the increase of service life, some old stadiums are facing the need for functional improvement and structural reinforcement.In the renovation project, retaining the original steel structure and strengthening it is an important way to achieve resource conservation and cultural inheritance.Before reinforcement, the original structure needs to be comprehensively tested and appraised to understand the steel performance, connection condition, degree of corrosion and structural deformation.According to the test results and the requirements for use after the transformation, determine the scope and plan of reinforcement.For structures that have reached the design service life but can continue to be used, the remaining life assessment needs to be carried out to provide a basis for the reinforcement design.

Structural reinforcement technology needs to be selected according to specific circumstances.For components with insufficient carrying capacity, the method of increasing the cross-section can be used to increase the cross-section of the component or paste the welded steel plate.For connecting weak nodes, it can be strengthened by adding connecting plates and adding high-strength bolts.For structures with insufficient overall stiffness, support systems or dampers can be added to improve seismic performance.For rust-damaged components, rust removal and anticorrosive treatment are required first, and then reinforcement and reinforcement are carried out.The reinforcement material should be compatible with the original structure, and the reinforcement construction should minimize the damage and demolition of the original structure.

While retaining the original structure, the renovation project also needs to be upgraded in function.The renovation of the grandstand can adjust the seat layout to increase comfort; the renovation of functional rooms can optimize the space layout to meet modern needs; barrier-free facilities need to be added to meet the use of the whole population; fire protection, lighting, sound reinforcement and other systems need to be updated in accordance with current standards.After the renovation was completed, the old stadium not only retained its historical memory and structural characteristics, but also exuded new vitality and vitality.This kind of technical practice combining reinforcement and functional improvement has been applied in many old stadium renovation projects and has accumulated rich experience.