Experimental study on temperature and stress of concrete filled steel tube with large temperature difference between day and night
LI Yanling;Xi'an Railway Vocational & Technical Institute;
In order to study the effect of debonding attracted by short-term temperature loads,the experiment places the CFST members and the concrete members in the artificial climate simulation box to study and to observe the effects of the CFST members and the concrete members in different temperature and to compare the influence of the two members suffered. The results show that if the CFST columns and concrete columns are placed in the largely different temperature,the core concrete of CFST to change in temperature than pure concrete temperature change to small,and the internal temperature of CFST and concrete column is always lagging behind the atmospheric temperature. And if the atmospheric temperature varies greatly,the strain and force of steel tube and concrete are changed obviously. The change of the strain and stress of the steel pipe are bigger than the core concrete. So the debonding between the steel tube and concrete is sticky,and the temperature difference is bigger,the debonding is higher.
【CateGory Index】： TU398.9