The Safety Assessment Of The Oil Derrick And Foundation With Micro Damage Suffered By Earthquake Loaded

As a complex large space steel structure,the oil derrick and the base steel structure are directly related to the safe operation of the whole system.And received a degree in oil derrick and substructure of micro damage,the overall structure of the safety performance and carrying capacity decreases,its under earthquake load will form a safety hazard.In this paper,the seismic response analysis of oil rig is analyzed by the method of quasi-static force,reaction spectrum and time-range reaction analysis,and the response rule is obtained.In this paper,the sensitivity of the oil rig under seismic load is analyzed and its influence is obtained.For the first time,the seismic safety evaluation of micro damage oil derrick and base was carried out based on stochastic reliability.By pseudo-static analysis of oil derrick and substructure,based on the decomposition of two quasi static analysis theory to study the structure seismic static response,preliminary get oil derrick and substructure in the change of stress and displacement under earthquake excitation.Using seismic response spectrum analysis and the seismic time history response analysis,concluded that the seismic dynamic response rules of oil derrick and substructure,the damage of oil derrick and substructure is studied under seismic load of security.This paper analyzes several forms and corresponding damage equivalent transformation of oil derrick and base structure micro damage.Used the theory of structure relative sensitivity has been obtained for the first time the micro damage forms of oil derrick and the base displacement response and stress response of the earthquake,the influence of dynamic response,it is concluded that the greatest influence on seismic performance of the micro damage forms.By ZJ70 type oil derrick and substructure laboratory model,for example,given the damage degree and the location of a micro damage form,containing micro damage oil derrick and substructure in the seismic security analysis,based on the random reliability through reliability evaluation index,evaluation of the seismic safety of oil derrick and substructure.