Thermal Stress Analysis and Structural Optimization of High-Rise Buildings under Stack Effect

Abstract

Thermal stress and thermal strain are the major causes of wall cracking of high-rise buildings. The key to wall cracking control lies in regulating thermal stress, and reducing the uncoordinated deformation probability of structural members. However, the existing studies have not considered the common stack effect of high-rise buildings. To fill up the gap, this paper analyzes the thermal stress and optimizes the structure of high-rise buildings under stack effect. Firstly, the cracking mechanism of structural members in high-rise buildings was expounded under stack effect, and the thermal stress of these buildings was analyzed in the light of that effect. Next, finite-element calculation was performed on the instantaneous stress field of high-rise buildings. After that, the thermal stress of high-rise buildings was fully analyzed. Several suggestions were provided for the structural design and optimization of high-rise buildings.