Design And Economic Analysis Of Isolation And Shock Absorption Of Frame Structure In High Intensity Area

The four-story frame structure under the seismic fortification intensity of 9 degrees and 0.4g is taken as the research object.By comparing and analyzing the seismic performance and economic indicators of the two,the following conclusions are drawn:(1)Designed with energy dissipation and shock absorption technology.The frame structure under frequent earthquakes is analyzed for elastic calculation,and the static elastoplasticity of the frame structure under rare earthquakes is analyzed.The results show that the maximum displacement angle between elastoplastic layers is 1/575、The maximum value of the displacement angle between layers under rare earthquakes is 1/81;the maximum structural shear force is 14634 kN;the floor bearing capacity is greater than 80% of the adjacent floor,and there is no weak layer.Meet the design requirements.(2)The seismic isolation structure is designed,and the isolation layer with two isolation bearings LNR700-Ⅱ and LRB700-Ⅱ is used.The analysis and calculation results show that the period of the isolation structure is significantly prolonged,and the displacement between the elastic-plastic isolation layers and the isolation layer support The maximum values of the parameters such as the shear force of the seat and the maximum compressive stress of the support are 307 mm,457kN and 4252 kN,which can meet the design requirements.(3)For the 4-story frame structure in this example,the total cost of energy dissipation and vibration reduction technology is 7.98% lower than that of seismic isolation technology.The initial cost of the energy dissipation and vibration reduction design is 9.29% lower than that of the seismic isolation design,of which the concrete engineering cost of the energy dissipation and vibration reduction design is 62.03% lower than that of the seismic isolation design,and the cost of the reinforced energy dissipation design is 16.66% lower than that of the seismic isolation design.The inspection and maintenance cost of the energy dissipation and vibration reduction design is 6.65% lower than that of the isolation design;the economic loss of failure of the energy dissipation and vibration reduction design is 25.29% higher than that of the isolation design.Figure 49;Table 55;Reference 47...