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Single tower cable-stayed bridge in Prestressed Concrete Cable Force Optimization

Author: WangGuanLei
Tutor: HuoKaiChengï¼›RenZhiGang
School: Wuhan University of Technology
Course: Structural Engineering
Keywords: Prestressed concrete Cable-stayed bridge A bridge cable force Construction Force Cable Force Optimization
CLC: U448.27
Type: Master's thesis
Year: 2010
Downloads: 109
Quote: 2
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Abstract


In this paper, Shayinghe Bridge as an engineering background , consider using the full framing girder segmental construction method cast features discussed prestressed concrete cable-stayed bridge construction control cable force optimization problems. In this paper, forward iteration method to control the main beam of the cross-section of the upper and lower edge of the maximum and minimum stress as the objective function for the optimization variables with cable force was established to bridge the state of rational calculation of cable force adjustment model . In order to get into the ideal bridge cable force , the need to consider the main beam uniformity moment , the main tower pier bending force and the auxiliary bearing reaction force , etc., using the influence matrix method for solving optimization problems, determine Shayinghe Bridge reasonable to bridge cable force . Calculated as the use of reasonable force for the initial iteration cable bridge cable force , the use of Unknown Load Factor function forward iteration method to calculate an integral bridge state. Then the composition and design of the bridge state value, meets the specified constraints in the objective function , through the cable force optimization model to get new tension control parameters , and then go to the next one being installed calculated until the completed bridge and ideals into bridges in good condition , in order to determine the initial construction of the bridge Shayinghe cable force . According to the characteristics of Shayinghe bridge construction - Full Support segmental cast construction, the construction of the local conditions of the proposed cable-stayed \locally are pulled , resulting in excessive local stresses and unreasonable force . Secondary tensioning cable-stayed achieve the design requirements, to eliminate the adverse forces within the main beam , while ensuring the safety of the structure during construction . And no need to increase the secondary tensioning tensioning device , the operation is relatively simple.

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CLC: > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridge: Structure > Cable-stayed bridge
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