Active Duty Reinforced Concrete Beams Curved Fracture Characteristics In The Assessment Of Bridge Inspection Pilot Study

At present with the age of bridges builted long, vehicle load increasing and strength of bridges reducing, people have to inspect and evaluate the strength of bridges. Since there are so many bridges to inspect and evaluate, the rapid and accurate methods are in need. Crack is one of the most important characteristics of reinforced concrete girders. From the details of crack expansion, we can learn about the reality of working state of bridges.The paper studys on bridge inspection&evaluation specifications of other countries , analyses crack effect on bridge inspection&evaluation , and brings forward the characteristic parameters of cracks .According to the basic theory of reinforced concrete structure , the parameters of cracks are caculated. Relations between the characteristic parameters of cracks and loads are given out through the tests of new and old reinforced concrete girdes. In a word the use of cracks on bridge inspection&evaluation tures is brought forward.