Research On Low-cost Simple Seismic Isolation Support Suitable For Rural Buildings System

The natural disasters of earthquakes are serious,and they have brought huge economic losses and casualties to people,especially in rural and urban areas.A large number of existing buildings in rural can no longer suitable for the design requirements of the existing specifications,especially a weak layer is easily formed at the connection between the building foundation and the superstructure after the earthquake,and causing the structure to undergo integral damage and continuous collapse.However,the rise of earthquake prevention and disaster mitigation technology can well improve the damage caused by this kind of earthquake.It is to install a seismic isolation support between the building foundation and the superstructure,and relying on the deformation generated by the support to consume or isolate the seismic energy,thereby protecting the safety of the main structure.However,the construction technology of traditional seismic isolation bearings is complicated and the cost is high,which is not conducive to the popularization of large-scale use in rural buildings.Therefore,it is urgent to find a seismic isolation bearing suitable for rural buildings.So,this paper designs a new type of simple isolation bearing with reinforced engineering slabs and rubber as raw materials,and an in-depth analysis is carried out on it using technical means of experiment and numerical simulation.The main research contents are as follows:（1）Introducing various strain energy function models that characterize the constitutive relationship of super elastic rubber materials.According to the known uniaxial tensile and plane tensile test data that finite element analysis was performed on two rubber materials of 55 HA and 90 HA which using ABAQUS.Fitting the strain energy function model of rubber.（2）Glass fiber and steel wire mesh are selected as the reinforcing materials,and epoxy resin is selected as the base material to make reinforced engineering slabs,which are subjected to basic mechanical performance tests of uniaxial tension and three-point bending.The calculation formula of the engineering constants of the reinforced engineering slabs is derived from the classical laminated board theory of composite materials,and the three-dimensional engineering constants of the reinforced engineering slabs are obtained with the test data.（3）The finite element analysis model of the reinforced engineering slabs is established by using the finite element software ABAQUS,and the uniaxial tensile and three-point bending tests of the reinforced engineering slabs are simulated,and the analysis results were compared with the test results to verify the validity of the finite element analysis.（4）Different types of AB glue were selected to make the reinforced engineering slabs and rubber laminated bearing products by cold bonding forming process.The basic mechanical properties of the bearing were studied systematically in vertical and horizontal directions.（5）The finite element analysis model of isolation bearing was established by using the finite element software ABAQUS.By simulating the vertical compression test and the horizontal shear test,the simulation results were compared with the test results to analyze the basic mechanical properties and isolation performance of the bearing.