The Dynamic Model And Seismic Response Analysis Of The Elevated Curved Bridge

With the rapid development of China’s transport undertakings, curved bridge iswidely used due to its closing line limit, linear smooth advantages. In recent decades,the occurrence of earthquake disasters is very frequently, more and more people payattention to the the elevated curved bridge’s seismic.This article analysis the history and current situation of the domestic and foreignelevated curved bridge; bridge structure in the earthquake damage characteristics andfailure modes; explore some of the lessons available for the the elevated curved bridgeseismic design reference.This paper analysis the composition and characteristics of the elevated curvebridge, the curved bridge’s dynamic model (stiffness simulation, mass distribution,material constitutive) to explore the several supports simulation method and itshorizontal stiffness and vertical stiffness formula. Elevated curved bridge calculationtheory and the theory of the state space in the modern control theory is introduced intothe elevated curve analysis of the bridge, the draw the elevated curved bridges thestate-space equations.This article takes Wanglong Interchange D Ramp Bridge as research background,taking the concrete linear servo model Kinh, establishes the finite element model of thecurved bridge using ANSYS, calculates the dynamic characteristics, calculates thebearing horizontal stiffness, vertical stiffness, pier height and radius of curvature andother parameters, calculates the degree of influence on the dynamic time historyresponse of the curved bridge, and lessons are drawn from some variation.Using the response spectrum method and dynamic time history analysis method thisarticle analysis the seismic response of this structure, calculates the maximum displacement of the structure in the mid-span of the different conditions, analysis of thestructure distribution of Internal Forces and Displacement, explores the history andcurrent situation of the domestic and foreign elevated curved bridge. Explore the prosand cons of the two methods by comparing the Pier Top magnitude of the displacementof each span in the size of the internal forces and displacements; using the responsespectrum method the elevated curved bridge seismic reliability. Pier, radius of curvatureand bearing horizontal stiffness parameters on the dynamic response of the elevatedcurved bridge and the law, made a number of seismic design recommendations.This article describes the non-linear model of lead rubber bearings, calculatesmaximum displacement of the structure in the mid-span of the different conditions andPier Top and internal forces using the dynamic time history analysis method.This articlecontrasts the results of setting the lead rubber bearings and the laminated rubberbearings and obtaines the isolation effect of the lead rubber bearing.