Method for testing bridge strain flexibility matrix
The invention discloses a method for testing a bridge strain flexibility matrix, which comprises the following steps of: establishing a finite element model according to a design drawing of a bridge, designing an acceleration sensor arrangement scheme, acquiring vertical vibration acceleration respo...
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| creator | WANG SHANSHAN ZHAO YUE ZHANG WENWU SUN XUFA QI XINGJUN |
| description | The invention discloses a method for testing a bridge strain flexibility matrix, which comprises the following steps of: establishing a finite element model according to a design drawing of a bridge, designing an acceleration sensor arrangement scheme, acquiring vertical vibration acceleration response of the bridge under environmental excitation by using an acceleration sensor arranged on the bridge, identifying basic modal parameters such as a vibration mode and a frequency of a bridge by applying a modal identification method, acquiring a concentrated mass matrix of a structure according to the bridge finite element model, calculating a vibration mode mass normalization coefficient, then normalizing an actually measured vibration mode, calculating a strain vibration mode and a strain flexibility matrix of the bridge by utilizing the normalized vibration mode, and predicting the modal strain of the bridge so that the target of conveniently and quickly measuring the actual strain of the bridge is achieved.
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| subjects | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING MEASURING PHYSICS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR |
| title | Method for testing bridge strain flexibility matrix |
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