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Study on Wind-Resistant Performance of Riding-Cable Crane in Long Span Suspension Bridge

Author: WangLingPeng
Tutor: LiaoHaiLi
School: Southwest Jiaotong University
Course: Bridge and Tunnel Engineering
Keywords: Cable load crane Rigid model wind tunnel test Equivalent static wind load Time history analysis Structural wind resistance checking
CLC: U445.3
Type: Master's thesis
Year: 2011
Downloads: 38
Quote: 0
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Abstract


The cable load crane as stiffening girder erection efficient equipment has a very important role in the construction of large-span suspension bridge construction. Cable load crane in a much higher altitude than the deck wind often encountered strong winds, wind resistant design parameters to be significantly greater than the value of the primary beam. View of the cable load crane security is directly related to the progress of the construction of the bridge and construction safety inspection and assessment of its wind resistance by wind tunnel tests and computational analysis is necessary. West of this thesis Baihe Gate Bridge engineering background, wind tunnel tests and computational analysis to assess the wind resistance of the cable load crane in strong wind conditions. Mainly the following aspects: (1) based on the rigid model of the cable board crane, four points leveraged balance synchronization dynamometer by wind tunnel tests for different combinations of conditions (different wind angles and wind attack angle) under the crane machine three directions along the bridge (of Lateral and vertical) wind load and translated shape coefficient crane suffered wind load wind angle and wind angle of attack changes the law, clear The crane is the most unfavorable wind load cases. The Turbulent Wind (2) application of harmonic synthesis programming on cable load crane design wind speed analog, Davenport-based quasi-steady assumption to establish a dynamic wind loads on the model of the crane. Finite element analysis program, its history analysis in the most unfavorable load combination of dynamic wind loads. (3), in accordance with the wind-resistant design specification of highway bridges \static gust load response analysis, the calculated results were compared with the calculated results and the time history analysis. (4) based on the concept of equivalent static wind load, linear elastic structure equivalent static wind load utility. Use this method, the the equivalent target response peak either the structure of the frequency domain analysis can also be a method of time-domain analysis results. Practical methods and gust factor method were used to calculate the the crane design wind speed equivalent static wind load. (5) both structural strength and overturning stability the wind resistance designcheck, Crane made a comprehensive analysis of the crane with good wind resistance and sufficient security in the strong wind conditions.

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridge Construction > Construction machinery and equipment
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