Analysis On Temperature Field And Its Effect Of Concrete Filled Steel Tubular Rib Section

In the past over twenty years,to be a new type of bridge, Concrete-Filled Steel Tube Arch (which is called CFST arch for short) get a rapid development in our country. As some aspects on theory, calculation and formulation are still lag behind, so many problems wait to be study deeply. The problem of temperature is one of important subjects in research. The key issue is the change and law of temperature pattern in time and space. This article is emphasis on the discussion the affection of section temperature pattern after CFST arch established under sunshine action.This paper uses finite element method to analyze temperature pattern of CFST arch. First of all, it makes a brief introduction on the basic theory of this method and talks at some length about simplification in calculation of sunshine boundary condition and solar radiation action. Next we did a test on section temperature pattern of CFST under sunshine action; research the temperature pattern and its affection according to the scene test. On this basis, we discussed to have a section diameter direction temperature-gradient mode which is accord with rib of CFST arch. Then we use finite element software which is called ANSYS to imitate temperature pattern and compared with its character and temperature-gradient which is mentioned to the experimental data to further validate the applicability of this temperature-gradient mode and the veracity of experiment data of temperature pattern. At last, use the software to work out the temperature stress of the component to get a primary analysis of the impact of temperature on concrete hollow and the affection of temperature on carrying capacity of CFST.The research of the experiment and theory about temperature pattern and its affection of CFST in this dissertation can provide some basis for theory and reference for technology to solve the problems of temperature pattern in CFST design for future in addition to offer certain reasonable opinion for the further consummate of correlative standard to accelerate the development of CFST arch on temperature affection theory.