Input seismic motion estimation method, input seismic motion estimation system

摘要

PROBLEM TO BE SOLVED: To reduce the construction cost of a structure by suppressing excessively increasing seismic performance required for the structure. SOLUTION: This is a method for estimating an input seismic motion used as a design load of a structure, in which a plurality of fault models are generated by a probabilistic method with each of a plurality of parameters related to the fault as a stochastic variable, and a plurality of fault models are generated. For each, the ground motion is estimated based on the propagation characteristics of the ground motion from the source to the ground surface of the construction site of the structure, and multiple ground motions are generated from multiple fault models. The response spectrum of is calculated, the average value and standard deviation value of multiple response spectra are calculated, and the required response that satisfies the required performance of the structure is based on the sum of the average value and the value based on the standard deviation value. Calculate the spectrum and estimate the input seismic motion that matches the required response spectrum. [Selection diagram] Fig. 2