Dissertation > Excellent graduate degree dissertation topics show

Seismic Response Analysis of Irregular Structure in Urban Grade Separation

Author: WangLongChen
Tutor: ChenXingChong
School: Lanzhou Jiaotong University
Course: Bridge and Tunnel Engineering
Keywords: Interchange project Irregular bridge Dynamic characteristics Seismicresponse Nonlinear time history analysis
CLC: U441.3
Type: Master's thesis
Year: 2013
Downloads: 1
Quote: 0
Read: Download Dissertation

Abstract


Limited by the road alignment and the pursuit of beautification of the structure, theprofiled wider multi-room box structure are often used in the bifurcation junction by whichthe main bridge leading to the ramp in the viaduct project and interchange projectconstruction in the city. These irregular bridges are generally constructed of straight bridgeand curved bridge, which are combined in various ways based on the route trend. In terms ofprevious earthquake damage, the curve bridge suffers more, compared with the curve bridge,the irregular bridge is more complex in structure and character of external force, thus,anti-seismic research of it is of great significance.This paper carried out the analysis of urban interchange profiled bridge dynamiccharacteristics, response spectrum and nonlinear time history based on the engineeringbackground of an irregular bridge of Shenan Bridge in Lanzhou City. Focus on the impact onthe dynamic characteristics and seismic response of the bridge caused by different modelcategory and the boundary condition of ramp bridge. The paper suggests the principle ofselecting local model for seismic calculation of irregular bridges commonly used in theinterchange projects.The main research contents are as follows:(1) Briefly described the overview of the development of the urban interchange arbitrarybridge and damage characteristics, concluded the current status and problems of the seismicstudy of the urban interchange profiled bridge.(2)Based on the engineering background, the paper established the finite elementanalysis model of single beam and grillage of the upper structure,discussed the influence ofdifferent model categories, as well as the boundary conditions of ramp bridge in the the urbaninterchange arbitrary bridge on the dynamic characteristics.(3)Carried out the response spectrum analysis of single beam model and grillage modelrespectively, analysised the difference of two models under the elastic seismic response.Reasonable aseismatic analysis model of irregular structure in urban grade separation is putforward. The shortcoming of single beam model was pointed out.(4)Carried out response spectrum analysis of grillage model that connects different unionnumber of ramp bridges, and the influence on the seismic response of the mainline bridgecaused by union number of ramp bridges are analyzed. According to the analysis results,andcombined the different orientation of ramp bridge constraints, a reasonable calculation modelwas determined eventually.(5)Using the0┬░~180┬░rotating input method, carried out the response spectrumunidirectional drive analysis of the reasonable calculation model determined in the former sections, discussed the most unfavorable earthquake input direction of irregular structure inurban grade separation.(6) As for the practical background engineer of this paper, a lead rubber bearing modelwas set up, non-linear time history analysis was carried out, and compared with ball shapedsteel bearing in the design. Shock absorbing effect of lead core rubber support model toirregular structure in urban grade separation was studied.

Related Dissertations

  1. Analysis on Static-dynamic and Fatigue Characteristics of Metallurgical Overhead Traveling Crane,TH215
  2. The Research on the Experimentand Dynamic Characteristics of the Pilot Switch Valve Used on One Spacecraft,V432
  3. Research on Reentry Dynamics and Guidance of Manned Deep Space Exploration,V448.2
  4. Numerical Simulation on Dynamic Characteristics of Orbit Maneuvers Propulsion System,V412.1
  5. Study on LRB Design Parameters Influence of Seismic Isolation and Pounding Effects for LRB Isolated Simple Supported Beam Bridges,U443.36
  6. Research on the Virtual Prototype and Dynamics Simulation of Bridge Crane,TP391.9
  7. The Fluid Dynamics Characteristics for Suppression of Vortex-induced Vibration on Marine Riser by Affiliated Risers,O353.1
  8. Modeling and Simulation Research of Full Hydraulic Steering System for Wheeled Machinery,TH137
  9. The Type Selection and Optimization Research on Aluminum Alloy Transmission Towers,TU395
  10. Analysis of Dynamic Characteristics for AC Servo System and Study on Parameters-Tuning,TG659
  11. Research on 100MW Solar Chimney Generation System,TK514
  12. Dynamic Characteristics of Combustion of Circulating Fluidized Bed Boiler and Its Control Simulation,TK224.11
  13. Hydraulic Support with Double-unload Protection Safety Valve Characteristic Simulation and Experimental Research on the System,TH137.52
  14. Research and Application for the Seismic Performance of Long-Span Steel-Arch Structure,TU352.11
  15. The Research of Static and Dynamiccharacteristics of Double Buffering Load Sensor Large-flow Amplification Hydraulic Steering System,TH137
  16. Characteristics of the Force Structure and Load Test Evaluation for the Long Span Beam-arch-frame Composite Bridge of V-shaped Pier,U441
  17. Dynamic Characteristics and Seismic Response of Cantilever Piers Surrounded by Water,U441.3
  18. Research on the Dynamic Performance of the Long Span Self-Anchored Suspension Bridge with Composite Girder,U448.25
  19. Effect of the Direction of Ground Motion on Long Span Cable-Stayed Bridges,U441.3
  20. Seismic Response Analysis of the Continuous Rigid Frame Bridges,U441.3
  21. Response and Damage Analysis of Ship/offshore Platform Collision,U661.4

CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Bridge vibration and damping device
© 2012 www.DissertationTopic.Net  Mobile