The bearing capacity parameter analysis and heat energy storage loss test of concrete composite box girder

In order to study the relationship between bearing capacity of structure and damage degree, author proposed parameter analysis heat storage loss test concrete composite box girder. Taking five-span prestressed girder as an example, different degrees are simulated by reducing bending stiffness parts, modal strain energy method flexibility difference used diagnose structural damage. The results show that for first span, sum can meet corresponding specification requirements under condi?tion dense traffic less than 20% When is greater 20%, span beam cannot driving requirements. Under general conditions, when 30%, basically requirements, second third spans still have a high safety factor. case 30% although ? it does not but RF > 0.9. Each monitoring point has good estimation accuracy, error maximum temperature occurrence time each mon?itoring within 10 hours . For continuous structure, superior method.