Research of Influence of the Shape of Unreinforced Masonry Shear Walls Made of Calcium Silicate Masonry Units

3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium

土木建筑工程;文学

Jasinski, Radoslaw^1

Department of Building Structures, Silesian University of Technology, Akademicka 5, Gliwice

44-100, Poland^1

关键词: Failure mechanism;    Failure stress;    Head joints;    Masonry units;    Sigma-c;    Test elements;    Thin layer mortars;    Unreinforced masonry;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/2/022009/pdf
DOI  :  10.1088/1757-899X/471/2/022009

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

We performed tests on 6 calcium silicate masonry units which were laid in thin layer mortar with uneven head joints. Walls were divided into two series and denoted by convention as HOS (Jasiski 2016) and HOS-H. Those two series differed in overall dimensions of test elements. Three walls from HOS series had identical external dimensions: l = 4.50 m, h = 2.45 m (h/l = 2.45m/4.50m), and thickness t = 180 mm. The walls were tested at different values of initial compressive stress σc = 0; 0.1; 1.0 and 1.5 N/mm2. The HOS-H elements were prepared as unreinforced test elements with the length l = 2.25 m height h = 2.45 m (h/l = 2.45m/2.25 m) and thickness t=0.18 m, and tested at initial compressive stress equal to σc = 0.1; 0.75; 1.5 N/mm2. The tests showed that the wall shape had a negligible effect on the morphology of cracks and the failure mechanism. An increase in wall length caused a roughly proportional increase in values of cracking and failure stresses. Shorter walls were under considerably greater cracking and failure stresses. An increase in wall length led to a significant decrease in values of shear strain angle regardless of initial compressive stress. The reverse situation occurred at the moment of destruction. Values of shear strain then increased with an increasing length of the wall.