Elasto-plastic Time History Analysis Of The Changde Airport Terminal Concrete Frame-steel Roof Structure

With China's reform and opening up,the whole national economic situation has been rapidly developed,people's living standards have also been significantly improved.In the choice of travel mode,people have more options,and travel by plane is one of the most efficient way.Today,the aviation market in the business travel,long-distance travel and other needs are driven by the vigorous development of the city's airport construction,the force performence researches on airport terminal buildings and other related buildings has become a important issue of structural research at present.Due to the interior space environment and the aesthetic needs of the building,the roof structure is frequently used in airports and high-speed rail stations and other large stations.The roof is not only the overall structure of the building envelope envelope,but also the main bearing structure part.The structure of the roof wirl greatly affect the force performance of the integral structure,and in the earthquake,the impact of the roof structure is particularly prominent,so as a important building structure with a large roof on upper part,the study of its seismic performance is very necessary and has a reference value.In this thesis,7 degree earthquake is applied on the reinforced concrete frame-steel roof mixed structure of Changde Airport Terminal station,and the synergistic effect of this mixed structure under the earthquake will be discussed,as follows:(1)Summarizes the development of seismic research in large-scale gymnasium of roof system,and briefly analyzes the application and force characteristics of the roof structure and mixed structure.(2)The theoretical basis and computing method of elastohydrodynamic time history analysis is introduced,.The dynamic balance equation and the related numerical algorithm are introduced.The principle and method of selecting the seismic wave according to the target response spectrum are introduced.(3)The elasto-plastic dynamic time history analysis of the steel structure of the Changde Airport Terminal has been carried out with 7 degree rare earthquakes.The results show that the maximum displacement value of the structure is smaller than the displacement limit of the specification.The number of structural plastic hinges is small,which is all P or M3 plastic hinge,and the whole plasticity degree is not high.The structure of the whole to meet the 7 earthquake rare earthquake requirements.(4)The modal analysis of the mixed structure of the steel roof was carried out.The dynamic characteristics of the mixed structure were explored by the deformation of the main mode and the periodic frequency.The distribution of the weak part and the whole structure Happening.(5)Takes the structure of the steel structure of the mixed system as an example,it explores its synergistic effect in the upper and lower parts,and simulates the 7 degree rare earthquakes of the model of the upper steel roof under different supporting conditions.The results show that the approximate response of the middle and lower reinforced concrete frames in the steel roof structure of the mixed system is discussed.