Abstract: With regard to the QTZ315 tower crane,the vibration characteristics and the first five natural frequencies of the tower crane are obtained by using finite element software ABAQUS,Through the test of extracting 3 point stress finite element model is verified.Applying the El-centro seismic wave on tower crane,tower crane response in no-load and loading condition were calculated by non linear time-history analysis method,The results show that in the 7 degree earthquake wave,the stress and displacement of boom and tower body connection point increase with the lifting load,and the change trend is the same.When the lifting weight is 1.5 t,the crane break off duo to strength failure,but the stiffness is still enough.The analysis results provide the scientific guidance for safe use and reasonable design of the crane.

Key words: tower crane, modal analysis, seismic response, time-history analysis, failure