Study On Seismic Isolation And Reinforcement Technology Of Archaize Hall

As a bridge to communicate the history and reality of diversified society,archaize architecture,based on the accumulation of practice,imitates the appearance of ancient buildings and brings forth the new by solidifying the form of artistic expression,It is widely used in large temple tourist attractions and scenic courtyards all over the country.However,due to the imperfection of related codes and with the improvement of seismic design level and the further development of seismic identification requirements in China,especially the fifth generation ground motion parameter zoning map was issued and implemented in 2016,and the fortification intensity of many areas has been improved,Therefore,according to the new fortification requirements,the existing buildings in the intensity enhancement zone should be strengthened and transformed,which is different from the ordinary ones.Particularly,the research on how to apply the seismic isolation technology with innovative significance and excellent seismic performance to the existing antique buildings with the significance of preserving and carrying forward the national traditional culture is still in the blank stage.In order to solve the complicated construction difficulty of the superstructure support system of the archaize building,this paper presents a technical problem of strengthening with high decoration cost and high construction difficulty,Firstly,the structural characteristics of the reinforced concrete archaize hall are analyzed and summarized through reading literature and field investigation.The main research contents and results are listed as follows:(1)On this basis,the idea of using seismic isolation technology to reinforce the hall is put forward from the perspective of overall reinforcement.And based on the finite element simulation method based on Midas Gen archaize halls isolation before the full three-dimensional integral space finite element model,through the comparative study on the modal analysis and dynamic time history analysis of the original structure and the natural vibration characteristics and dynamic response of the structure.It has been shown that: When reasonably designed,the basic isolation technology can effectively reduce the dynamic response of the superstructure under the action of earthquake,and ensure that the original function of the building will not be interrupted,the original style will not change,with good economic and social benefits.(2)Then,in order to further understand the isolation performance of the archaist-style buildings,the effects of different flexion ratio and equivalent stiffness on the top floor acceleration and the displacement of the seismic isolation layer of the archaist-style buildings are compared.Research shows that: The flexion weight ratio of the isolation layer has a significant effect on the damping performance of the isolation structure,and show a certain regularity: the horizontal damping coefficient and the top acceleration decrease first and then increase with the increase of flexion weight ratio,and the displacement of the isolation layer decreases with the increase of the flexural ratio.When the yield ratio is between 0.015 and 0.055,it can not only enhance the damping effect of the superstructure,but also reasonably control the displacement of the isolation layer.It is recommended to select 0.035;The horizontal equivalent stiffness and top acceleration increase with the increase of the horizontal equivalent stiffness,and the displacement of the seismic isolation layer gradually decreases with the increase of the horizontal equivalent stiffness.Taking the reduction of one-and-a-half earthquake action as the isolation target under the action of fortification earthquake,the optimal equivalent stiffness can be adjusted to be controlled at0.7-1.2 times of the actual isolation layer stiffness.(3)Finally,combining with the actual engineering needs,the optimal design method of support based on MATLAB programming can complete the selection of isolation support with high efficiency and high quality,which can greatly reduce the project cost while ensuring the damping efficiency.