Research On Composite Base Isolating Earthquake System

Buildings are major places in which people live and produce normally,Buildings that are safe,useful and with perfect function are basic requirement for living and production. However,earthquake may impair building's safety directly.It can cause heavy disaster for social economy,people's life and property.Quake-proof technology has become important content.Isolating-earquake technology has is important subject of quake-proof technology. Even though researching of isolating-earquake has developed for many years,moreover many experimental buildings have been built up in globe,existing isolating-earquake systems still have various faults undoubtedly,which make them meet with great restrictions in process of putting into real use.Up to now,they have not been approved widely and used considerably.Existing isolating-earquake system's limitations are mainly list as follows.First,a great number of existing isolating-earquake systems may bring forth displacement only,but can't bear overturning moment with earthquake.Second,most of existing isolating-earquake equipments can provide displacement,however they can't restore effectively displacement of earthquake.Third,traditional isolating-earquake systems usually are single-handed systems. Once they meet with damage,their isolating-earquake functions will be lost immediately. Fourth,although common soft-bottom-floor isolating-earquake system can isolate earthquake theoretically,actually because of it's smaller rigidness and lower beating capability,It is more liable to fall.Therefore,it can't normally isolate earthquake finally.Fifth,present rubber isolating-earquake pad is used universally.However,it is apt to turn old and lose elasticity quickly,these faults will result to end its isolating-earquake function early.Moreover,it is not easy to repair.On the basis of background,this paper work hard to make best use of the advantages and bypass the disadvantages,bring up a set of new-type isolating-earquake system----"Composite Base Isolating-earquake System".In accordance with the new-type system,the paper has researched in detail concept of isolating-earquake,constitution of the systems,isolating-earquake principle,designing method,configuration measures, construction technology etc.First of all,form isolating-earquake idea,the article take hold of thought of whole designing for following concepts,such as bearing loads,isolating-earquake,return to original position,resisting over-turning superfluous isolating-quake and so on.It makes the system to be of evident features in beginning which are isolating-earquake,bearing loads,returning position,resisting overturning,having superfluous isolating-earquake function.Next,from configuration and constitution,the paper mainly divide the whole new-system into five-piece-systems which are swaying system,sliding system,buffer system, wasting energy system,returning position system automatically.Therefore,"composite Base Isolating-earquake system"is a new-type,multi-function,integrated system.Subsequently,from designing method,on the basis of researching result of predecessor, this paper raise a simplifying calculation pedigree method----"double-mass vibration-type decomposing reaction pedigree method"to new-system.On grounds of it,the part also put forward applied field about calculating earthquake reaction with bottom shearing force method.Besides,the paper still more quote two parameters which are ratio of period r and ratio of massη.From here,the part derives simplified calculation formula,chart of period, vibration-type,and participation-in coefficient of vibration-type and earthquake action.In view of earthquake reaction of isolation--earquake,the paper give a systems study for controlling of earthquake reaction,especially relative displacement.In addition,the paper takes fixed quantity study for restoring-force-model,isolating-earquake rigid of isolating-earquake floor,and sum up complete designing method.Then,by some calculation examples,using deferent method,the paper compare isolation-earquake structures with non-isolating-quake structures,and gives related conclusion.Final,to"Composite Base isolating-earquake system",the paper make planning and explaining,construction craft etc.The part set forth integration designing important principle of architecture,structure,isolating-quake,configuration,construction.Theoretical study shoe that this new-type system not only can efficiently isolate earthquake,but also can efficiently bear loads,resist overturning,restore position automatically,yet be with superfluous isolating-earquake function.Owing to the reason,the system really becomes a new-type isolating system with features of integration system, composite function,economy efficiency,property reliably.The new system is looked forward to playing a part in future structure isolating-earquake.