Iterative calculation analysis of seismic isolation bridges based on multi array response spectrum method
Seismic analysis of vibration-damped bridges can be performed by the multi array response spectrum method.Due to the nonlinear characteristics of seismic isolation devices,the displacement response of the structure during initial analysis is unknown,so iterative calculations are required.Taking a 4-span continuous cast-in-place box girder on a certain project as an example,based on the multi array response spectrum method,midas Civil is used to iteratively calculate and analyze the seismic isolation bridge,The number of iterations that meet the requirements of the specifications is given,and the effectiveness of the seismic isolation device is tested by comparing and analyzing it with non seismic isolation bridges.
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