Seismic Response Analysis Of Continuous Frame Bridge With V Piers

In recent years,with the development of the city and landscape needs, continuous rigid frame with V piers in the modern city is more and more popular, but the earthquake response is more complex, the corresponding aseismic analysis design, and evaluation is more difficult, therefore developping seismic response analysis of continuous rigid frame bridges with V piers is of important theoretical and practical significance.Taking No.4 bridge Ningbo city Fuqing road for example do research of seismic response of continuous rigid frame bridges witb V piers.We set up a finite element analysis model,and consider pile-soil common role of deep pile foundation in soft soil. First,we make dynamic characteristics analysis of structure, based on which make spectrum analysis, and consider the influence of high order modes, draw on the flexible piles between edge across and next across occur the influence to the earthquake response of the structure Second,we make time history analysis of the structure, it is concluded that displacement and internal force time-history curves of the key sections under different seismic input, and compare the diffrences of displacement and internal force of the peak of key sections of model one and model two under different seismic wave combination, it is concluded that the influence of adoption of flexible piles on the seismic response of structures, then compare the results to the results of spectrum analysis,at the same time of spectrum analysis and time history analysis of the structure, analysis how horizontally vibration influence vertical earthquake effects and vertical vibration influence horizontally earthquake effects.