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Falling beam bridge girder minimum length of lap preliminary study

Author: KongYiDa
Tutor: TangGuangWu
School: Chongqing Jiaotong University
Course: Structural Engineering
Keywords: Falling beam system Liang lap length Charpy Continuous beam Uniform Design Seismic conceptual design
CLC: U442.55
Type: Master's thesis
Year: 2010
Downloads: 105
Quote: 1
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Abstract


Girder bridge superstructure off the bridge one of the most serious forms of damage. Beam falling on the anti-seismic measures of economic construction and bridge seismic is facing an important issue. Previous earthquake damage has been caused by falling beams attention of experts at home and abroad, they are off the beam damage a lot of research, and achieved a lot. Lap length beam beam system as an anti-fall part of the re-amended writes, \But simply supported beam bridge and a continuous beam bridge lap length calculation methods are still many problems in this regard the lack of systematic research, the current norms also reference for relevant foreign research results. In this paper, a large number of simulation analysis to build bridges with the actual situation of our country to adapt beam bridge lap length practical simplified formula for research purposes. Mainly to complete the following work: ① This paper begins with the theoretical analysis start, uniform design method and parameters for calculating the overall planning program in order to calculate the sample through the least possible results of practical fitting precision simplified formula. Because the factors that affect a larger number of lap length (mainly consider this span, pier height and skew angle effect), select 10 for each factor level, if you do a comprehensive test or orthogonal test, the required number of tests will be very more. Using uniform design to be tested just to reach for multi-factor, multi-level test and relatively small number of trials purposes. ② According to the uniform design table, \According to \Calculated under earthquake in E2, Charpy bridge piers under earthquake longitudinal relative displacement of the beam. Using least squares regression analysis, fitting lap length formula. ③ In order to maintain the consistency of the formula in the simple beam calculations, based on the analysis by calculating the continuous beam bridge using the same formula time span and pier high value method. ④ through girder bridges calculations, further analysis of the adjacent bridge pier / associated cycle ratio, stiffness ratio LNTOOL impact on the calculation results are given beam bridge seismic concept design.

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CLC: > Transportation > Road transport > Bridges and Culverts > Investigation, design and calculation > Bridge Design > Damage Analysis and Seismic Design
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