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Cable Force Optimization for Cable-Stayed Bridge Based on Whole Process

Author: WangCong
Tutor: FangZhi
School: Hunan University
Course: Bridge and Tunnel Engineering
Keywords: Cable-stayed bridge Cable Force Optimization The method of least squares Multi-objective optimization The whole process of
CLC: U448.27
Type: Master's thesis
Year: 2007
Downloads: 364
Quote: 7
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Abstract


Cable-stayed bridge with its sleek , spanning capacity favored by engineers , concrete cable-stayed bridge has been widely used in the country because of their lower cost . Cable tension adjustability makes the structural design for greater flexibility , there are also cable force optimization problem . The cable-stayed concrete cable-stayed prestressing tendons in the body should be regarded as prestressed optimization must consider cable force and prestressed . Cable-stayed bridge cable force optimization not only to meet the reasonable force into a bridge , but also to ensure the safety of the construction process and the operational phase , and the ultimate bearing capacity of the structure . Above , completed the following work : (1) domestic and international cable optimized research and analysis of the existing cable force optimization only for Bridge local optimization based on proposed thinking based on the whole process of construction , bridge operators and bearing capacity limit state optimization . (2 ) based on the influence of matrix thinking CABLE INSTALLATION initial tension as design variables , to select reasonable Bridge internal forces as the objective function , constraints to the construction stage safety cable force uniform , the least squares cable force optimization method . The method can be synchronized to optimize construction and bridge stage internal forces , and by iteratively solve various geometric nonlinear problems . Numerical example , the method is feasible , a good application . (3 ) optimization method based on least squares to initial tension cable construction and prestressing tendons tension is common as a design variable in order to become the bridge internal force reasonable amount of prestressing tendons minimum of the objective function , to the construction stage safety cable constraints force uniform , the cable-stayed bridge multi-objective optimization methods . The method can also optimize the cable and prestressed simultaneous optimization of the internal forces of construction and bridge stage . For a concrete cable-stayed bridge on the optimization process of cable force uniform constraint , the objective function selection parameters , and come to a final optimization results . ( 4) Introduction of a cable-stayed bridge materials , geometric nonlinear analysis method and program ideas has dual nonlinear program cable-stayed bridge capacity analysis , compare different optimization methods for the structural limit state may the appropriate conclusions .

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