Ứng dụng thiết lập hệ thống quan trắc SHMS cho cầu Cần Giờ

Abstract

Structural health monitoring system (SHMS) is installated on the some structures from the beginning of construction and over the life of the bridge (abiding 100 years). Datas are tranfered from sensor to process center data, the  managerment and  frofessional can be analysis and  warning  about  risks  can  happen. (ex: overload , crack, settlement,…). From there, propose solutions to the bridge system with the longest life expectancy, and evaluate the effectiveness according to the set targets. From here, it’s one of the bases for researching and perfecting the structure to achieve the best exploitation quality. SHMS is solve three problems, such as:

- Observe the impact of the environment on the structure: Measure wind, temperature  air, relative humidity of the air, seismic vibration;

- Observe the impact of structure: Measure temperature on the parts of the structure, stress and deformation, displacement , tension of cable, tilt of the tower, oscillation and corrosion;

-  Observe the impact of the live load and vehicle traffic on the bridge: weight of vehicle, camera.

However, there are very few specific design instructon documents in Viet Nam, scope of article the author design SMHS for cable stayed bridges.