| Along with the rapid economic development of our country road and bridgeinfrastructure construction speed by leaps and bounds, bridge structure crack problemincreasingly prominent. According to different design level of bridge structure, theconcrete is allowed to have cracks, therefore concrete structure working with crackshas become a common phenomenon. Fracture crack reaches a certain value when thebridge structure will be destroyed. Therefore, the design of our country standard fordifferent grades of concrete structure crack width limit value of the correspondingprovisions.Concrete crack control is the key to crack width, there are lots of factors affect thecrack width calculation to precise calculation of crack width is very difficult. Thisarticle summarizes the cracking of concrete structure crack the main cause of the maintypes and cracking, for reinforced concrete test beam cracking in the whole process ofanalysis and research, record test beam from cracking until damage each test phase ofthe concrete crack development. On the theory of crack width calculation analysis andcomparison the test beam measurement scaled finite element analysis and adina.theroad bridge gauge calculation of crack width data, test the accuracy of the finiteelement software to calculate the crack width. Finally through the project example ofthe finite element analysis to calculate the carrying capacity of concrete crack widthfor bridge, providing a new method for bridge assessment. |
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