The Study Of Seamless Super Long Structure Technology

With regard to the earthquake effect, the method of building structure design always gives first place to anti-seismic design, which has been given out regulation in various norm and guide on the basis of the building basic law. On the other hand, the approach of "isolation" or "vibration" which inhibiting the role of the earthquake, making the earthquake did not transfer energy to the building has entered the field of structural design, and there have been a lot of practical applications in recent years.In recent years, large-scale public building construction has been booming in China, the demand of architect to the length of seamless concrete structure become higher and higher, also there are more super-long, super-large buildings, most of the structure using partly pre-stressed concrete framework structure, with no or few seams. But the thermal stress is an important factor to be considered when designing this kind of seamless super-long structure, so it is particularly important to carry out the study of structural deformation and thermal stress control under temperature field affect.This article summed up the application of base isolation system at this stage, and discussed the application problems on the basis of isolation technology, on this basis, the structure and performance of the isolation unit, as well as the realization of in ANSYS have been studied; in the same time, introduced the current application situation of super-long structure, and made a new method of thermal stress control in the super-long structure.Based on the "release" principle, solved the thermal stress problems of super-long seamless structure through rational layout base isolation devices.Combined with the Kunming new airport terminal actual works, analyzed three different isolated programs from the point view of effective control of thermal stress, effective control of isolated structure reversion and isolation effects, integrated considering two aspects of thermal stress and isolation effects. Analyzed and contrasted the internal thermal effect stress situation and deformation situation of upper structure, and evaluated the effects of isolation.The results showed that, from the effective thermal stress control aspect to layout rubber isolattion, thermal stress can get a better release, but can not control the reverse of upper part structure, when reverse happened, the displacement of peripheral components became much larger than central elements, causing the components under large force to be destroyed when the other major component have not give full play in the case; from the effective control of reverse to the structure aspect to the layout rubber isolation, the reverse can be effectively controlled, but isolated result was not satisfactory, did not achieve the expected shock absorption effect; the third program combined the advantages of the two above programs, got further optimization,and made both the thermal stress control and isolation effects achieve better results.