Study Of Parameter Optimization Algorithm On The Seismic Dynamic Response Analysis Of The Slope With A Weak Intercalation

A large number of landslides were found in the slopes with counter-tilt weak intercalation after “Wen Chuan” earthquake on May 12 th, 2008. Many results about the subject have been completely gotten through kinds of methods by the scholars, especially the numerical simulation. Studies have shown that rock parameters of slopes will be changed dynamically under dynamic excitation. In engineering,the static elasticity modulus would be selected an enlarged value for numerical simulation empirically, which is tough to be controlled scientifically. The computing results will not be consistent with the observations. After the dynamic variation of rock mechanic parameters could be detected directly and accurately, the reliability of numerical simulation could be improved significantly by choosing the accurate values of the mechanic parameters. Aimed at choosing the accurate parameters, in this paper, parameter optimization theory was promoted to select the better rock parameters of slopes in using of the goodness of fit. The proposed method was applied to analyze the dynamic response of rock slope with weak intercalation under seismic wave, Mainly work have been accomplished for the influence of the dynamic response of rock slope, including the varies of angles of weak intercalation, of which the varies of the thickness, the spatial location and the quantities.Some useful conclusions could be obtained as:1?In order to investigate the validity of the proposed optical algorithm, the finite difference software(FLAC-3D) was employed to compute the optimal numerical model. The numerical results were consistent with the experimental data. The proposed method can be employed to simulate various model accurately and analyze the variation of dynamic response of complicated rock slopes, based on some finite and necessary physical model tests.2?By virtue of the parameter optimization theory, the elasticity modulus of the upper rock mass would exponentially decrease during the vibration process. if the layers were divided by the weak intercalation, but the below's steady increase to approximate 10% to 30%.3?With the help of the optimization model,the results were again proved that the interface like a natural filtration barrier between the rock mass and the weak intercalation, which effectiveness depended on the difference of the rock mass, the impedance ratio, the thickness and the angles of the weak intercalation.4?The effective path of amplification coefficients of slope was firstly put forward to describe the dynamic response of rock slope, which would be influenced by the locations and the quantities of the weak intercalation, the effective path of amplification coefficients of slope surface was similarly equal to the sum of the verticality and the horizon. This research mainly focused on the simulation of the dynamic response variation of rock slopes with different inclination angles and thickness of a weak intercalation under the sine-wave excitations with different frequency and amplitude, the effect of the variation of the frequency and amplitude on the slope dynamic response is also investigated in this research...