3 results about "Seismic hazard" patented technology

The application discloses a strong ground motion risk assessment method and system fusing multi-source data, relates to the technical field of multi-source data fusion, and calculates the time offset relationship of a satellite positioning sequence Gns and a radar deformation sequence Ins relative to a unified time reference Tref by using the unified time reference Tref, and performs time correction processing on a multi-source original set Dor by constructing a time offset matrix Tmx, so that a corrected data set Dsc with a unified time structure is formed. Fusion analysis is performed on the corrected data set Dsc to form a fusion feature set Fus, and the vibration propagation relationship is calculated based on the fusion feature set Fus to obtain a propagation path Pth, and finally, a risk result Rsk and a corresponding risk level Lev are output. The problem of misjudgment of the vibration propagation order caused by the time record difference of different observation systems can be avoided, and more reliable data basis is provided for earthquake disaster warning and emergency decision-making.

The application discloses a structural seismic optimization design method, belonging to the field of civil engineering and seismic design, and comprising the following steps: step 1, selecting a representative seismic intensity based on a site seismic hazard curve; step 2, obtaining layer stiffness and layer shear strength of an initial building; step 3, establishing a multi-degree-of-freedom layer model by using OpenSees software; step 4, evaluating component damage and economic loss by using a HAZUS database; step 5, constructing a cost constraint model and an equivalent implementation; step 6, jointly optimizing the shear strength and stiffness of each layer of the structure by using a particle swarm optimization algorithm; and step 7, outputting the optimization result: outputting optimal layer shear strength and stiffness distribution. The application realizes the reduction of economic loss under the premise of ensuring that the construction cost is unchanged by combining site hazard, component damage and loss evaluation and a swarm intelligent algorithm.

A method for assessing the economic losses of buildings due to earthquakes, considering the interaction between structure and nonstructure, belongs to the fields of earthquake engineering and structural seismic analysis. The method includes the following steps: Step S1, establishing a building performance model; Step S2, determining the seismic hazard level: selecting the ground motion intensity index IM, and determining three intensity levels—minor, moderate, and major—as target hazard levels based on the seismic fortification intensity of the site; Step S3, establishing a three-dimensional structure-nonstructure coupled finite element model; Step S4, performing nonlinear time history analysis and obtaining engineering requirement parameters; Step S5, establishing a building collapse vulnerability function; Step S6, calculating residual displacement and determining whether the damage is repairable or not; Step S7, calculating economic losses based on the theory of total probability; Step S8, interaction contribution coefficients and modeling decisions. This invention improves the accuracy of earthquake economic loss assessment results.