الفهرس 
MASONRY MATERIALS AND CONSTRUCTIONOnly 14 pages are availabe for public view
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Abstract
Concrete block masonry structure may be economical in construction cost and time
compared with other types of structure. Recently. grouted and reinforced masonry bas been
introduced to provide structures with sufficient ductility and strength necessary to resist
vertical and lateral loads. also leads to an economical system by using slender sections.
The present study focuses Oil the efTect of varying height to width (h/w) ratio. and
the effect of grouting the top courses of the panels or adding a reinforced masonry bond beam
at the top of the panels on the cracking loads. failure loads, strains. and displacment under inplane
concentrated load. The present experimental-theoretical study contains the results of
twelve medium scale panels devidcd into three groups with different (h/w) ratio. Each group
consisted of four panels. the first panel did not include Any grout or reinforcement and was
considered as reference panel for comparison. The second and third panels were used to study
the effect of grouting the top courses. The fourth was used to study the effect of adding a
reinforced bond beam at the top of the panel. The results including displacements, strains,
cracking and failure loads. are presented. discussed and compared.(the used F. E. program
has been modified and improved by Ewing & Associations).
The results of the present experimental-theoretical study can be summarized as :1-
By increasing h/w ratio from 2/3 to 4/3 . the failure load decreases by about 10% for
plain panels, 17% for grouted panels and 23% for panels with bond beam, and The
vertical displacement of the point just under the concentrated load increased.
2- Grouting the very top course and the two top courses of the panel caused 18% and 40%
increase ill the values of failure loads respectively, compared with the plain wall panel.
3- Adding a bond beam on the top of the wall panel had a significant effect on the general
deformational behaviour of the panel. and caused 50 and 90% increase in the values of
cracking and failure load respectively. Also it decreases the strain concentration at
middle of the panel by about 35 to 50%. Adding grout or bond beam also decreases the
vertical displacement under the concentrated 10<1dsby about 25% • 40% respectively.
4- The results of the finite element analysis showed a good agreement with the results of
the tested wall panels. TIle failure loads obtained form the F.E.A. were higher than the
values obtained experimentally by about 5-10°-;’.
This study clearly demonstrated the adequacy of partially grouted masonry as an
alternative building system.