Abstract
Loading of masonry with concentrated load is a sufficiently common case of loading which occurs due to structures of various purposes and sizes which lean against masonry wall, column or partition wall. Reinforced concrete or metal beams, reinforced beams, wooden structures of roof or span are leaned against masonry structures most usually. Investigations show that masonry structures under concentrated load withstand higher loads than structures of which the whole surface area is compressed. In most cases traditional bricks’ masonry under concentrated load was investigated. Its head joints are filled with mortar. This paper describes the experimental and numerical modeling results of investigation of calcium silicate hollow blocks masonry with thin layered mortar and unfilled head joints compressed by concentrated load. The more dangerous case when the edge of masonry unit (wall) is affected by concentrated load was chosen for analysis. Preliminary investigations have shown that the bed joints transmiss horizontal stresses. The stress distribution angle is close to 60°, i.e. close to stress distribution in masonry with filled head joints.
Highlights
In order to analyse masonry according to the area of surface under load two cases of compressive load may be distinguished
This paper describes the experimental and numerical modeling results of investigation of calcium silicate hollow blocks masonry with thin layered mortar and unfilled head joints compressed by concentrated load
The first one, when whole masonry surface area is affected by uniform compressive load, and the second one, when masonry is affected by concentrated compressive load
Summary
In order to analyse masonry according to the area of surface under load two cases of compressive load may be distinguished. Masonry structures under concentrated load withstand higher loads than structures of which the whole surface area is compressed This increase in structural strength after experiments was first identified and described by German scientist Johan Bauschinger (Onischick, 1939). The results of research on such masonry loaded with concentrated load are few in the literature In this case, the question arises as to whether the same assumptions as for traditional brick masonry with filled head joints can be applied in determining the strength of such a masonry subjected to the concentrated load. The aim of this research – to analyze behaviour of calcium silicate hollow blocks masonry with thin layered mortar and unfilled head joints while compressing it with concentrated load. The most dangerous case was chosen for analysis, when the edge of masonry unit (wall) is subjected to the concentrated load
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