Research On Earthquake-resistance Model And Parameter Influence Of Irregular Viaduct

With our economy developing and urbanization process strengthening, various cities and throughways among them by viaduct and flyover as main body and nodal point are being built. In order to meet the demands of bridge design and structure optimization, construction aesthetic in building and etc., many viaducts which have characteristics with curve or fold line as circuit arc and backspin in its flat surface, fluctuation curve in its facade and inhomogeneous height change of bridge pier or large height difference turned up, these are called irregular viaduct, to straight bridge and inclined bridge.From the view of recent several earthquakes conclusion, modern municipal bridge, especially, earthquake-resistance theory and concerning technology of irregular viaduct do not come to maturity. It is expected that deep research about Earthquake-resistance model of irregular bridge, analytical way and parameter changes (of structure, component, bearing, connection) which to influence structure earthquake-resistance performance. Such, this article include following points;(1) Systematically conclusion about common forms of different structure and construction member in our irregular viaduct, meanwhile, according to rubber bearing (reducing shock isolation component), application and developing of reducing shock isolation technology are discussed.(2) Summarizing and Talking about simple calculation of bridge structure and calculation theory of curve bridge structure.(3) Dynamic characteristics of irregular viaduct and damages form, cause and lesson of bridge structure in earthquake are Analyzed.(4) Analyzing and choosing different construction member of irregular bridge structure, determining calculation model of component and whole structure fitting for practice.(5) Using SAP2000 finite element analysis software to analyze model dynamic characteristics, parameter changes (of structure style, bridge pier height and bearing) to influence structure dynamic bridge are Discussed, then its regularity and conclusion are analyzed and obtained so as to support reference for design.(6) Expending concept of shock isolation and researching it in different structure styles and structure style, parameter change of construction member to influence shock isolation. Analyzing main elements of shock isolation affected and putting forward existing problems in application and shock isolation ways to improve.(7) From theory explaining relationship between bending resistance rigidity of bridge pier and rubber bearing horizon shearing rigidity. Putting forward relationship establishing intensity and distortion between them in hope of displaying each construction member performance and optimize structure design.(8) Discussing characteristics of different value integral way and mode assembly way in time history analysis, choosing proper integral and mode assembly way. Representing amortization reference set-up, earthquake wave access and earthquake motion input as well.(9) Going to analyze structure dynamic time history analysis. Researching size and change of structure bridge pier bottom shear, bearing shear distortion and whole structure moving in earthquake action. Discussing whole response of structure in earthquake and presenting lots of conclusions and suggestions about improving structure design and optimizing structure performance as well.