Abstract
Test research on behavior and theoretical analysis were carried out to ensure the in-service safety for the reason of diseases of existing double arch bridges[5]~[6]. Combing with a practical example of Menggong Bridge present situation, the performance was detected and the actual bearing capacity was checked through multi working conditions loading test. The finite element calculated model was established using the software MIDAS to simulated analyze internal forces and deformations. The comparison showed that the calculated result was well agree with experimental data, the structural design was reasonable and the flexural stiffness and bearing capacity were enough. The results also indicated that Menggong Bridge should be reinforced for the diseases, and the test and finite element calculation model were effective and reliable.
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