Research on Crack Formation in Gypsum Partitions with Doorway by Means of FEM and Fracture Mechanics

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Kania, Tomasz^1 ; Stawiski, Bohdan^2

Wroclaw University of Technology, Faculty of Civil Engineering, Grunwaldzki Square 11, Wroclaw

50-377, Poland^1

University of Zielona Gora, Faculty of Civil Engineering, Architecture and Environmental Engineering, Licealna 9, Zielona Gora

65-417, Poland^2

关键词: Cracking damage;    Floor slabs;    Internal partitions;    Load-bearing;    Masonry walls;    Material modeling;    Partition walls;    Smeared crackings;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/4/042021/pdf
DOI  :  10.1088/1757-899X/245/4/042021

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Cracking damage in non-loadbearing internal partition walls is a serious problem that frequently occurs in new buildings within the short term after putting them into service or even before completion of construction. Damage in partition walls is sometimes so great that they cannot be accepted by their occupiers. This problem was illustrated by the example of damage in a gypsum partition wall with doorway attributed to deflection of the slabs beneath and above it. In searching for the deflection which causes damage in masonry walls, fracture mechanics applied to the Finite Element Method (FEM) have been used. For a description of gypsum behaviour, the smeared cracking material model has been selected, where stresses are transferred across the narrowly opened crack until its width reaches the ultimate value. Cracks in the Finite Element models overlapped the real damage observed in the buildings. In order to avoid cracks under the deflection of large floor slabs, the model of a wall with reinforcement in the doorstep zone and a 40 mm thick elastic junction between the partition and ceiling has been analysed.