For steel structure bridges, common treatment methods include the following aspects:

1. Surface anti-corrosion treatment: Due to the susceptibility of steel to corrosion, it is very important to carry out surface anti-corrosion treatment on steel structure bridges. Common anti-corrosion methods include spraying anti-corrosion paint, Hot-dip galvanization, sand blasting, etc. These methods can effectively protect steel structures from factors such as oxidation and corrosion in the atmosphere.

2. Maintenance and repair: Regular maintenance and repair are key to ensuring the long-term use of steel structure bridges. This includes regular inspections of bridge structures, attention to potential issues, repair of surface damage, and treatment of corrosion. If serious corrosion, damage, or fatigue issues are found, larger scale repairs or strengthening engineering may be required.

3. Monitoring system: Installing a monitoring system can monitor the health status of steel structure bridges in real-time. These systems include strain sensors, vibration sensors, temperature sensors, etc., which can monitor parameters such as stress, deformation, vibration, and temperature of the structure. By analyzing monitoring data, structural abnormalities can be detected in a timely manner, and early warning and maintenance measures can be taken.

4. Seismic design: In areas with frequent earthquakes, it is necessary to carry out appropriate seismic design and seismic reinforcement. This includes adopting appropriate design standards and specifications, and using appropriate seismic structural measures to improve the seismic safety of steel structure bridges.

Overall, the treatment methods for steel structure bridges mainly include surface anti-corrosion, regular maintenance and repair, installation of monitoring systems, and seismic design. These measures can extend the service life of the bridge, improve the safety of the structure, and ensure the reliability of the bridge during use. The specific treatment method shall be determined according to the specific conditions and service environment of the bridge, and it is better to consult the professional structural engineer or relevant departments.