Numerical Analysis Of Influencing Factors On Seismic Performance Of Self Re-centering Pier

As the vertical weighing and horizontal resistance component of bridge structure,pier plays an extremely important role in the stability and safety of the overall structure of the bridge.The damage caused by failure or even the whole bridge pier collapsed is the main form of bridge-disasters.Self re-centring pie is a new type of seismic pier,which considers the structural energy dissipation and effectively controls the post earthquake residual deformation of the bridge pier on the basis of assembled pie.A combination of prefabricated bridge piers component of high quality,high flexibility,low environmental impact,low field requirement,short time advantages,and can eliminate or reduce the earthquake intensity caused by traditional pier seismic based on the concept of “difficult to repair” or repair engineering problems high cost effectively,become the dominant direction of future development of the pier.Based on this background,the seismic performance of self re-centring pier is studied.The main research contents are as follows:(1)Briefly introduces the important role of the form and piers under earthquake earthquake disaster for the overall stability of the bridge,and cast-in-place piers,prefabricated bridge piers and self re-centring pier differences in overall stability,lateral resistance,Energy dissipation capacity,and three kinds of types of pier seismic design principle the analysis of the comparison.(2)The design of the structure and composition of the Self re-centring pier components are analyzed and introduced,and the mechanics of pier are studied,analysis of the mechanical balance re-centring the hysteretic mechanism and displacement in the loading stage two.(3)In the pier structure and longitudinal reinforcement and stirrup set under the same conditions,established the finite element and integral cast-in-situ pier model reduction using ABAQUS software,analyzed two types of pier hysteretic energy dissipation capacity,displacement-load characteristics of the skeleton curve and the relevant value the seismic performance of bridge pier are analyzed related.(4)The structure model and loading the same using the same evaluation index,change the energy components set,to explore the impact of energy components on the pier seismic performance,the author explores the reinforcement of reinforced energy dissipating components position and influence of the earthquake to the pier.(5)The form of reinforcement and the structural style remain unchanged,and the slenderness ratio of self re-centring pier is changed.The same loading mode and evaluation index are used to explore the influence of pier slenderness ratio on the seismic performance of Self re-centring pier.