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Ramp Bridge shear lag and its influencing factors

Author: LiChen
Tutor: XiaYiMing
School: Nanjing University of Aeronautics and Astronautics
Course: Bridge and tunnel engineering
Keywords: Ramp Bridge Shear Lag Bending radius Longitudinal Cross slope Types of Support FEM
CLC: U441.5
Type: Master's thesis
Year: 2010
Downloads: 42
Quote: 0
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Abstract


In this paper, the Nanjing Yangtze River Bridge days after the village interoperability C Ramp Bridge as the research object , using the finite element software ANSYS one-dimensional beam elements were drawn out of its vertical forces and units in the unit of torque moment influence line , and the use of three-dimensional solid elements analysis of its dead load , the design and the design temperature load lane highway grade Ⅰ loads of shear lag effect . In addition, for bending , longitudinal , transverse slope and analysis of such factors as bearing type single-box dual-chamber three-span concrete continuous curved box girder bridge shear lag effect , changes of different factors come under the junction of the roof webs Shear Lag vertical distribution coefficients , as well as controlling the transverse cross-sectional distribution of shear lag coefficient . The results show that : 1. Temperature loads on shear lag effect significantly ; compared to lane load , the control section shear lag effect depends on constant load ; radius ramp bridge longitudinal bending moment changes can influence line refer straight bridge . (2) has a cross slope, longitudinal continuous curved bridge structure at the outer edge of the web shear lag coefficient greater than the inside edge of the web is mainly caused by bending and cross slope , longitudinal slope has little effect on the shear lag ; point hinge bearing eccentricity no significant effect on the shear lag , torsional hinge bearing bearing points compared with the inner bearing shear lag at the obvious differences . For the above conclusion , summed up the corresponding design method as a reference design .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Stress analysis, thermal stress
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