Thermodynamic analysis of temperature shrinkage effect of wall filled frame structure

Abstract

The existence of temperature cracks seriously affects the use of infilled walls. This paper reports on the analysis of finite element numerical simulation about this. The calculation method of wall temperature stress had been discussed, and found the determining method for location of temperature crack. And on this basis, it studied on the wall crack design theory based on temperature effect. Though the real-time substructure test, research the main factors of temperature shrinkage that affect wall cracking. It was found that the temperature contraction developed rapidly in the early stage, and then slowed down gradually, after 28 days, the shrinkage of each specimen was almost stable. Compared with the standard curing condition, the temperature shrinkage was more obvious under natural curing condition. Also the cement mortar shrinkage effect is better than that of mixed mortar in reducing temperature shrinkage. These conclusions provide a reference for controlling the cracking of wall.