Based On The Static Load Test Girder Bridge Structure Damage System Identification Study

Due to the design and construction originality error and the long influence of the environment to the structures, the reinforced concrete bridge structures always have some structure disease and damage. These structure disease and damage's happening and evolution will affect the structure capability and the normal use of the bridge structures in the service time. Especially, These structure disease and damage will affect the safety of the bridge structures. Scientific structure disease examination and structure damage identification to bridge and gaining actual structure work status of the bridge are precondition and foundation of right using, reinforce and maintain bridge which has some structure disease. These works can also prevent the bridge casualty. Study of bridge structure disease examination and structure damage evaluation become the focus in bridge area.Currently, the method of bridge structure disease examination and structure damage evaluation mainly bases on apparent examination and Static-state or dynamic load test, In this paper, based on the previous study result, the systemic research on a new method of beam system bridge structure damage identification and evaluation is being carried out, which is realized base on the segment flexural rigidity of reinforced concrete beam which is gained by using the theory of system identification and the result of Static-state load test. Structure damage identification and evaluation of the practical project is being made, and some useful conclusion is get.1. The method of bridge structure disease examination and structure damage evaluation is reviewed; its application and limitation are discussed briefly.2. The basic theory of system identification of the beam segment flexural rigidity basedon the result of Static-state load test is demonstrated, the realization program is worked out and the academic example is analyzed. The method of bridge structure disease examination and structure damage evaluation based on this theory is carried out.3. The basic theory and step of whole process analysis of reinforced concrete beam section flexural rigidity is stated, the realization program is worked out and theacademic example is analyzed.4. Based on the Static-state load test result of two practical projects, the application of the reinforced concrete beam system bridge structure disease examination and structure damage evaluation method is stated, and satisfaction result is gained. Theory analysis and practical project prove that the method of the reinforced concrete beam system bridge structure disease examination and structure damage evaluation is reasonable and viable.