Method for excitation of planar body waves incident in any direction in numerical simulation of slope seismic response

Abstract

The present invention provides an incident plane body wave excitation method in either direction in slope seismic response value simulation, belonging to the geologic hazard analysis and control field. The method comprises six steps: slop modelling; time series analysis starting of each node on the slope bottom excitation boundary of the incident plane body wave excitation method in either direction; stress component time-history calculation generated at each node at the slope bottom through different seismic phase body wave excitation; superposition time-history calculation of different body wave seismic phase fluctuating stress component at the slope bottom excitation boundary nodes; slope bottom excitation boundary node body wave excitation input; and dynamic response result extraction of each node in the slope model. The incident plane body wave excitation method in either direction in the slope seismic response value simulation can solve the problem of the incident seismic wave input in either direction in the slope seismic response value simulation, realize the incidence of the seismic plane body wave in either direction including oblique incidence and vertical incidence, reveal the influence of the seismic plane body waves with different incident directions on the slope seismic dynamic response and the diversity of the seismic slope failure, and has great significance.

Description

technical field [0001] The invention relates to the field of slope seismic response and stability analysis, in particular to an incident plane body wave excitation method in any direction in numerical simulation of slope seismic response. Background technique [0002] my country is an earthquake-prone country, and the slope instability induced by earthquakes will directly threaten the safety of people's lives and properties. Therefore, the study of slope stability under earthquake is of great significance. However, there are great uncertainties in the slope instability induced by earthquakes. This uncertainty mainly comes from two aspects: the properties of the slope itself and the potential earthquake action. Including slope rock and soil structure, physical and mechanical properties and slope geometry; potential earthquake action is the inducing factor of slope instability. For a specific slope, it can be considered that the characteristics of the slope itself are relativ...

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Problems solved by technology

[0004] To sum up, in the current research on the seismic dynamic response of slopes, the input method of seismic load is single, and the problem of oblique incidence of seismic waves from different directions is rarely considered, and the effect of seismic waves of different seismic phases is rarely considered.

At the same time, the selection of the frequency and duration of the input seismic waves and the stacking processing of seismic waves with different seismic phases are not perfect enough

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