... brickwork and the other in blockwork.
4.2 .3 Sections 3 and 4: design
Sections 3 and 4 contain the main design information, starting with a
statement of the basis of design. Unlike its predecessor, CP111, ... application of the code provisions to a typical design is given in
Chapter 10.
4 .3 BS 5628: PART 2—REINFORCED AND PRESTRESSED MASONRY
Part 2 of BS 5628 is bas...
... steel
3 Masonry properties
3. 1 General
3. 2 Compressive strength
3. 3 Strength of masonry in combined compression
and shear
3. 4 The tensile strength of masonry
3. 5 Stress-strain properties of masonry
3. 6 ... typical design calculation
for interior-span solid slab
13 Movements in masonry buildings
13. 1 General
13. 2 Causes of movement in buildings
13. 3 Ho...
... a
height-to-length ratio of 1.0 or more and the strength of a wall is
calculated on the plan area of the wall in the plane of the shear force.
Fig. 3. 3 Typical relationship between shear strength of brickwork ... mortar and masonry strengths. Such
relationships are illustrated in Fig. 3. 1 and are incorporated in codes of
practice, as set out in Chapter 4 for BS 5628 and Euro...
... determination of the value of the characteristic compressive strength
of the masonry (f
k
) and the thickness of the unit required to support the
design loads. Once f
k
is calculated, suitable types of masonry/ mortar
combinations ... value
of the characteristic compressive strength of the masonry f
k
. Typically the
equation takes the form
(5.11)
Generally the calcu...
... 5.18)
Load from above=1 .35 ×21.1+1.5×2.2 =31 .785kN/m
Self-weight of wall=1 .35 ×17=22.95kN/m
Total vertical design load W
1
=54. 735 kN/m
Load from slab W
2
=1 .35 ×4.1+1.5×2.2=8. 835 kN/m
Eccentricity
Equation ... (a).
Design vertical load resistance
In this section the value of Φ
i
=0.90 must replace the value of ß=0.78 used
in section (a) and
␥
m
=3. 0, resulting in a va...
... strength of panel=10N/mm
2
• Partial safety factor for masonry= 3. 1
• Section modulus for each column=600 cm
3
• Section modulus for each beam=800 cm
3
• Yield stress of steel=250N/mm
2
• Partial ... capable of carrying a triangular load of
masonry in which the span of the beam represented the base of an
equilateral triangle. The method allowed for a proportion of the s...
... in Fig. 10.6 is below the cut-off line for shear, the design
will be safe in shear.
10 .3 SHEAR STRENGTH OF REINFORCED MASONRY
10 .3. 1 Shear strength of reinforced masonry beams
As in reinforced ... characteristic strength of the masonry has
limited influence on the design.
10.2.5 Example
Design a simply supported brickwork beam of span 4 m and of section
215mm 36 5mm...
... weight of
masonry is 21kN/m
3
. Design the beam for serviceability condition
(
␥
f
=1).
Solution
(clause 29.1, BS 5628: Part 2)
(clause 29.2, BS 5628: Part 2)
Assume M
i
is 30 % of ... 4
The beam of example 3 is to be used as simply supported on a 6 m span.
It carries a characteristic superimposed dead load of 2kN/m
2
and live
load of 3. 0 kN/m
2
; 50%...
... detailing as in Fig. 13. 3(b).
Fig. 13. 3 (a) Bowing of infill wall and detachment of brick slips as a result of
frame shrinkage, (b) Detail of horizontal movement joint to avoid damage of the
kind shown ... infill and steel
␥
mm
partial safety factor for compressive strength of masonry
␥
ms
partial safety factor for strength of steel
␥
mv
partial safety factor for shear stren...