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Research on the Longitudinal Horizontal Stiffness Limited Value of Common Continuous Grider Bridge Pier’s Top

Author: ZhangXun
Tutor: LiXiaoZhen
School: Southwest Jiaotong University
Course: Bridge and Tunnel Engineering
Keywords: Continuous beam bridge CWR Liang track interaction Additional Longitudinal Forces Bridge pier Vertical line stiffness
CLC: U441
Type: Master's thesis
Year: 2008
Downloads: 171
Quote: 1
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Abstract


CWR is a major change in the structure of the track , is one of the main symbol of the modernization of railways . Beam , rail interaction force between the bridge and rail bridge laying CWR caused the bridge load . Longitudinal Stiffness of Piers key technical parameters , bridges and seamless line design Welded Rails and Pier longitudinal force distribution and the size of the beams, rails displacement depends largely on the Longitudinal Stiffness of Piers . The subject pier top longitudinal horizontal stiffness control conditions , 32 48 32m, 40 64 40m and 48 80 48m three commonly span continuous beam bridge pier top longitudinal horizontal stiffness limits of the analysis and calculation . This article system and summarized the current domestic and international bridge CWR additional longitudinal force in the design concept , the parameter selection , calculation models and other aspects of the distinction . For the lack of previous studies on the basis of absorbing domestic and foreign research to establish the line - Bridge - Pier - the basis of integration of CWR on bridge additional longitudinal force calculation model , using large general-purpose finite element program ANSYS Parametric Design language (Ansys Parameter Design Language, APDL) for the second development , the preparation of the CWR on bridge longitudinal additional force the program ALFCWR ( Additional of pulmonary function forces of Continuous Welded Rail ) , and analyzed by comparing the number of large domestic and Design Institute CWR on bridge additional longitudinal force the calculation software BCWR calculation results verify the reliability of the program . Of the three commonly used span continuous girder bridge as the research object , CWR on bridge longitudinal additional force use ALFCWR program , CWR on bridge vertical additional force investigated the pier top longitudinal horizontal stiffness to apply to these three span continuous beam bridge pier top longitudinal horizontal stiffness limits for commonly span continuous beam bridge CWR design reference . Reference to the German railway bridge design specifications the DS804 (B6 Edition) use ALFCWR program pier temperature difference load caused continuous beam bridge CWR additional longitudinal force to discuss and analyze the pier height , pier the stiffness , bridge span length , fixed support seat position , the bridge linking load on piers temperature difference caused CWR additional longitudinal force investigated and obtained some useful conclusions .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics
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