Method For Damage Diagnosis Of Structure Based On Sound Wave CT And Strain Mode Technology

A lot of structural damage diagnosis method commonly used in engineeringfields，Sound Wave CT technology and Strain Mode technology has been extensivelystudied for its own advantage．However，due to the complexity of the actual structuralengineering，there are some difficulties in the engineering application with SoundWave CT and strain mode．The feasibility and practicality of damage diagnosis withSound Wave CT and Strain Mode technology is respectively verified by finite elementanalysis and experimental study．the main work of this paper is the following aspects：（1）introduce the theoretical basis，detection diagnosis of ideas and techniques forconcrete structure diagnosis based on Sound Wave CT，summary the commonimaging inversion algorithm，and provide the basis for follow up study．（2）based on the Sound Wave CT detection，analysis the location and size of damagein concrete model，synthetic rubber model and concrete block structure．combiningtheory and testing experience，sum up the key technologies of the practice of CTdetection method，then apply the Sound Wave CT detection techniques to the TianjinPort．（3）theory analysis the strain modal sensitivity of structural damage and strain modalorthogonality， summary the existing strain indicators about structure damageevaluation．Concrete beam with different damage conditions is numerical simulatedby ANSYS finite element，then analyzes sensibility of strain mode to differentlocation and size of the damage；by dynamic testing method，strain response ofsynthetic rubber beam with hammering incentive is measured，using STD ways toidentify the strain modal parameters，and then based on the parameters of the intactand damage，combining with the finite element analysis results，identify location andsize of structural damage．（4）Proceed from the practical application point of view， presents the method fordamage diagnosis of structure based on Sound Wave CT and Strain Modetechnology．...