Optimization Analysis Of Hanger Tensioning Process On Self-anchored Suspension Bridges

Over the past decade, China's self-anchored suspension bridge in a rapid stage of development and prosperity, because the structure of aesthetic form, topography and geological adaptable better economic performance, makes its rapid application and promotion. Through the hanger tension to achieve self-girder to the cable system from the stent conversion is self-anchored suspension bridge a key link in the construction process, how low the exhaustion of the number of repeated tension of the hanger so that full-bridge design to achieve a state of tension is the tension hanger the course of a problem that needs to be examined, the hanger tensionning of self-anchored suspension bridge has become the focus and difficulty of construction. Self-anchored suspension bridge for the construction of the key issues of the conversion system - tensioned girder from the hanger so that the complex nonlinear process support, to consider the carrying capacity of the structure and tension, such as equipment capacity constraints, self-anchored suspension bridge for the cranes cable tension analysis of the process.A combination of internal concrete self-anchored suspension bridge, its force structure and characteristics of non-linear combination of factors, cited space-analytical methods, in accordance with the length of the same components without the stress principle of self-anchored suspension bridge construction process of the controlling factors (cable-shaped, as well as the main cable and hanger material under non-stress length) are calculated, and the use of finite element software to verify the reliability of the numerical algorithm to determine a national of a concrete self-anchored suspension bridge in a reasonable state, for Research on the process of hanger tension provides the necessary foundation.A deep understanding of the process of hanger tension and displacement of the main cable hanger power control changes the construction of great significance. Through the analysis of finite element modeling methods were analyzed, the main cable to reveal the changes of displacement: displacement of tension tension displacement has been a "weak coherence"; hanger changes in the law of force is: between the hanger force strong coherence, strong coherence include "adjacent to uninstall" and "accumulation of non-adjacent" component of the two.At home and abroad in the comparison of self-anchored suspension bridge construction method hanger tension, based on the use of finite element software on a domestic self-anchored suspension bridge construction of the hanger tension calculated analysis program to determine hanger tension method and take advantage of this method were the most use of 4 sets of jacks and jack up to the use of 8-tensioning of the program, the program will be made with the original design of tension a comparative analysis of the program, this paper verified the reasonableness of the program . Most of the literature and put forward more than repeated rounds tension methods, this paper, the hanger tension in the vast majority of programs hanger tension only once, in order to effectively reduce the number of repeated tension and improve hanger Zhang La efficiency.