Analysis On Seismic Damage Of Construction Elevator Of Super High-Rise Building In Attached State

In the construction stage,because of natural disasters or human factors,construction machines are vulnerable and threat the safety of constructed workers.As the usual construction machine,and for the own features,construction elevator is very sensitive to earthquake.Including the construction elevator,Ludian earthquake caused in a certain degree of impact to the whole construction system of Wanda Twin Towers in Xishan district of Kunming.If the earthquake magnitude surpassed Ludian earthquake,or the main structure was constructing for the higher height,the construction elevator is likely to be affected by the earthquake to damage,even the construction accident.Therefore construction elevator of super high-rise building in attached state should be studied in detail under the action of earthquake.In this paper,Ludian earthquake was regard as research background,and S AP2000 was used to analyze the seismic response characteristics of Wanda Twin Towers in Xishan district of Kunming,and the following summarizes the main achievements made throughout this study.(1)According to the different work of the elevator,the finite element model in attached stage was set up.By Ritz vector modal analysis method,characteristics of main modes of elevator in attached state was obtained,including bending deformation and torsional deformation,providing the basis for the research on the dynamic characteristics of the construction elevator under the action of the subsequent earthquake.(2)According to elastic time history analysis method,the internal force of the elevator bar was computed under frequent earthquake,and the strength was checked.The results show that the bar's internal force was influenced by load,height of cage and direction of earthquake and other factors,that the requirements was meet by the bar's strength,and that the damage propagation was provided under frequent earthquake.(3)According to elastic-plastic time history analysis method,the overall deformation of the elevator structure was computed under design earthquake and rare earthquake.The results show that the different height and different parts of the elevator bars have different plastic hinge state,that the whole structure was influenced by the height of elevator and cage,that the elevator has been in danger or collapse state,and that the damage propagation of elevator was provided under extreme earthquakes.