Study On The Quakeproof Performance Of The Museum Structure And Cultural Relics Display System

Recent years,with the development of museums and the needs of the people's cultural life,there are a lot of large and complex museums to be built and the number of cultural relics in them becomes bigger and bigger.These enormous changes make the building system of a museum becomes new,multifunctional,higher and long-span,isolation damper and there are also some problems coming correspondingly.For example,the new building system will make the mass and stiffness of the structure asymmetrical.At the same time,more and more cultural relics will also make the cultural relics display system become higher and let its seismic performance weaker.The emergence of such new problems will have a great influence on anti-shock performance of museum.At present,the study of the earthquake-resistant properties of museums often separates the earthquake-resistant structures of buildings and the earthquake-resistant of cultural relics,the uniform design concept is lack,which makes the museum is more difficult to effectively to ensure the safety of flame cultural relics under the action of earthquake.Therefore,this article in the museum structure and its cultural relics of the characteristics of earthquake damage on the basis of research to the antiquity of cultural relics as the focus of research.From the museum structure,cultural relics,structure,system three sides in the face of it,to study the seismic mechanism,shock design methods and shock resistance performance by means of experiments,theoretical derivation and finite element modeling and calculation.In this paper,the influence rules for the combination of four factors,such as the type of seismic wave,the intensity of input,the height of the gravity center of the display cabinet and the cultura l relics on the quakeproof performance of the system are analyzed;the main control indexes and the basis for the design of quakeproof of cultural relics are put forward;the suspension damping system is developed and the calculat ion model is established;This paper analyzes the destruction mechanism of cultural relics,and puts forward the corresponding discriminant.This paper analyzes the destruction mechanism of cultural relics,and puts forward the corresponding discriminant.The structural system of quakeproof design of museum is optimized.At the same time,this paper proposes the finite element method should be the priority for modeling calculat ion,the split and integral calculation methods are studied by the examples.The quakeproof safety system of museum structure-cultural relics are analyzed.Combining with the test and theoretical analys is,This paper studies the shock control method,gives the anti-shock performance level,and put forward the failure criterion.Then the acceleration control acceleration roadmap and road map of the museum system are also given.The specific research work is as follows:(1)At present,the quakeproof performance of the cultural relics for many museums is usually based on experience.It does not carry out scientific and rigorous seismic hazard analysis,test and theoretical calculation,so its actual earthquake effect is lack of reasonable basis.To this end,a two-story frame structure model is made for the prototype of the ceramic cultural relics display system.The shaking table test on the floated cultural relics,fixed cultural relics with nylon thread and cultural relics with suspension damping device is carried out about quakeproof performance.In the test,the influence of various factors on the seismic performance of cultural relic system is discussed,such as different types of seismic waves,different seismic intensity,the height of the center of gravity of different display cabinet,the different of display cabinet gravity center,the different height of cultural relics gravity center,different measures of earthquake.(2)Aiming at the problem that the measurement index of seismic performance is not clear,through comparing with the magnifying coefficient of the displacement and acceleration,it is pointed out that the acceleration index should be taken as the control index for the seismic design of cultural relics.In order to effectively improve the cultural relics of the anti-shock performance of the system,the suspension damping system is developed.By the comparison of the cultural relics' quakeproof performance for suspension damping system and the conventional nylon thread Rachel fixed,When the seismic input is small(PGA <0.20g),the damping effect of suspension structure is not obvious.When the seismic input increases(PGA> 0.20g),the isolation system exhibits a better shock absorption effect and its shock absorption effect increases with the input of seismic waves.(3)The anti-seismic performance of the cultural relics using traditional anti-seismic measures is compared and,and the main failure modes of ceramic relics are sliding and overturning.The fixed degree of display cabinet and cultural relics on the anti-seismic properties has a greater impact.According to the cabinet is fixed on the ground or floor,cultural relics are fixed on the display cabinet or not,the seismic calculation model of the movable cultural relics display system is divided into four types: I,II,III,IV.The four kinds of models were analyzed from slipping,shaking and the coupling of sliding and shaking.The mechanism of the earthquake is studied,and the corresponding discriminant is put forward.Analyzing the seismic effect of cultural relics which are fixed with nylon thread on the four corners in shaking table tests,the expression of the maximum allowable seismic input value is derived.O n cultural relic test pieces as an example,consider horizontal-vertical seismic action and only the level of seismic action to calculate the seismic response of t he specimen;the results show that the influence of vertical seismic effects on cultural relics cannot be ignored.(5)By comparing the quakeproof performance of common museum structures,it is proposed that the reinforced concrete frame and frame shear s tructure are suitable for the seismic design of the museum.The equivalent shear model and the flexural shear model tend to plane analysis,it can not accurately reflect the seismic response of complex structures under seismic action.Stereo analysis method needs to consider the influence of many factors,such as mass,stiffness,eccentricity and moment of inertia,the calculation process is complex and the accuracy is not high.So it is suggested to use finite element modeling method.Taking the 8 story reinforced concrete frame structure and frame shear structure as the examples,the seismic response of the same structure and different nodes on the same floor under different conditions are studied.The results show that the seismic response of the same nod e in the same structure and different nodes on the same floor is different;the vertical component of seismic action has a great influence on the seismic response of cultural relics.(6)As an example with the eight layer frame shear structure of symmetric and asymmetric museum building,the split and integral finite element analysis model of the overall museum system is studied.The results show that the power transmission path of split type modeling is clear;it is suitable to the study on the display system of a single cultural relic.For the system of different cultural relics on each floor,the split type modeling should be calculated separately,taking time and effort.The seismic response of cultural relics is obtained through seismic analysis directly in the integrated modeling,reducing the transmission loss of seismic energy.So the integrated modeling is suitable to the whole study of the multi-cultural relics displaying system.Its disadvantage is that the seismic response of the cultural relics system is not obvious,so the analysis results have some deviation.(7)The seismic isolation and damping control method is analyzed in the museum building structure-cultural relic system.The rigid model,multi-mass system translation model,multi-mass system translation-swing analysis model between foundation and main structure are discussed.In order to reduce the effect of earthquake on the damage of building structural members,a design method of cultural relic display frame shock-absorbing beam is proposed.The quakeproof performance level of the museum building structure-cultural relic system is proposed.The main goal of the quakeproof safety control of the whole museum system is how to effectively reduce the damage to the whole system.The acceleration failure criterion is proposed by using the vibration control of the cultural relic system as the starting point.The acceleration control road map of the whole museum system is given.The isolation lead core rubber support(LRB)and Magneto-rheological Damper(MRD)isolation and damping mixing control system based on the quakeproof safety of whole museum systems is analyzed and optimized.