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Predictions of Static Load Test and Dynamic Characteristics of a Self-anchored Suspension Bridge

Author: SunChangLong
Tutor: LiuTieLin
School: Shenyang University of construction
Course: Structural Engineering
Keywords: Self-anchored suspension Structure detection Finite Element Static load test prediction Self - vibration characteristics Earthquake response
CLC: U441.3
Type: Master's thesis
Year: 2011
Downloads: 50
Quote: 0
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Abstract


The self-anchored suspension main cable anchor to withstand a lot of axial force in the stiffening beams stiffening girder , to cancel a large anchorage . Poor geological conditions , inconvenient construction anchorage to provide a solution to the way the construction of suspension bridges . Due to its novel structure , a simple calculation , has become widely accepted in the city 's small and medium-sized bridge construction . In this paper, a self - anchored suspension bridge as the research background , using finite element analysis software modeling and analysis in the case of structural weight , and the prediction of static load test , vibration and seismic response analysis . Were used plate unit model , finite element analysis model only consider bending beam model and considering shear effects and only consider the beam bending effects model stiffened steel box Liang Jianli , in the case of its own weight , the backplane stress compared with the measured data contrast the roof of the three models stress and boom stress value of plate element model simulation stiffening girder steel box more in line with reality. Influence line analysis to determine the most unfavorable position of the boom at No. 6 , Office of the boom of the 7th and 11 boom at the most unfavorable position of the three models vehicle cloth overload, overloaded case backplane the roof stress boom stress and the deck with the boom connection point at the settlement amount . The calculation results meet the current regulatory requirements , has a guiding significance for the field test of the bridge . Plate unit model is given first six modes and frequency , since the vibration frequency range 0.93Hz to 1.68Hz rope surface vibration , vertical vibration of the bridge deck system for this bridge vibration , bending of the tower , the main several forms of vibration of the torsion beam . , Respectively, with four strong motion records along the bridge and Transverse to the input , to the top of the main tower along the bridge from the anchored suspension bridge to the displacement drive and 6 suspender No. 11 boom at the middle of the web of cross-bridge to the displacement curves . The maximum displacement value of the main overhead Shunqiao to 6.4mm. Transverse to enter the self- anchored suspension bridge , No. 6 in the boom at the web of cross-bridge to the maximum displacement of 3.3mm; No. 11 in the boom at the web the maximum displacement of 5.7mm . Can provide the basis for the seismic design and analysis of the bridge .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Bridge vibration and damping device
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