Simulate The Seismic Wave And Analysis Dynamic Response Of Engineering Structures

The world’s earthquake disaster often occurs in China. Almost all the larger andmajor cities are located in the region of seismic fortification. The earthquake disasterhas become a crucial factor which restricts the social and national economicdevelopment. The Seismic time-history response analysis method is applied to studythe structural dynamic response of major bridge structures, building structures andother special structures and the earthquake acceleration or forced vibration caused bythe earthquake excitation is usually directly input. When we research the structuraldynamic response process in the application of seismic response analysis method anddesign the seismic of structure according to the actual, if the ground motion isunreasonably input due to the complexity vibration and the limited number of strongmotion records, the result of seismic response analysis is obvious difference.Therefore, the research work and the structure design cannot meet variousrequirements. To sum up, a reasonable appropriate choice of seismic waves is crucialfor the time history analysis of the structure.This paper researches the ground motions, the long-span cable-bridge structureand the building structure and uses MATLAB and general-purpose finite elementsoftware ANSYS and writes the APDL language. The ground motions were simulatedand the dynamic response of engineering structures was analyzed to study in thispaper. The main contents are as follows:1. The paper summarizes the engineering properties and description of theground motion, combined with the seismic design of structures, and indicates thathow to select, input and adjust the ground motions in the research and design.2. The paper applies the classic and basic method to be easily generated thesynthetic seismic waves which meet the design requirements according to the seismiccode-Seismic Design of Buildings GB50011-2010and Highway Engineering SeismicDesign JTJ-044-1989and the specific circumstances of the project sites. It provides auseful reference for the seismic design. 3.For comparing the seismic response of numerical methods-Duhamelintegral,the linear acceleration method,Newmark-βmethod,Wilson-θ,Nigam methodand Laplace transform method,MATLAB is used to be programmed,and to analyzethe errors in the time domain analysis and the frequency domain analysis.It seeks amore accurate solution.4.The software ANSYS is used to establish the200m+400m+200m ofthree-span and the twin towers and double cable planes prestressed concrete cable-bridge which is semi-floating system and used the isolation bearings connectionbetween its the pier beams,and L-type high reinforced concrete frame-tube structureaccording to practical engineering structures. This paper rationally selects two seismicwaves and the synthetic seismic waves to analysis the seismic response.It ensures thereliability of the calculated results which can be provided to design and study.