Method for evaluating rigidity of flexural reinforced concrete member based on acoustic emission ring-down count

The invention discloses a method for evaluating rigidity of a flexural reinforced concrete member based on acoustic emission ring-down count. The method disclosed by the invention comprises the following steps: obtaining an acoustic emission ring-down count changing curve by applying a load to a flexural reinforced concrete member; enabling bearing capacity of the flexural reinforced concrete member to be lowered and microcracks inside the flexural reinforced concrete member to be in a critical cracking state due to the load, and evaluating the rigidity of the flexural reinforced concrete member by virtue of the acoustic emission ring-down count changing curve; calculating acoustic emission ring-down counts N of the flexural reinforced concrete member in different loading stages; and according to a derived ring-down count N and a member rigidity formula, calculating linear rigidities K of the flexural reinforced concrete member in different loading stages, and further obtaining rigidity B. The method disclosed by the invention has the advantages that the related calculation parameters are definite in physical meaning and can be conveniently measured, and acoustic emission characteristic parameters are utilized for quantizing the rigidity of the flexural reinforced concrete member, so that a new approach is provided for analysis or evaluation of the rigidity of the flexural reinforced concrete member.