Information about confined masonry construction for earthquake resistant structures

2. Confined masonry construction consists of-Masonry walls
Horizontal and Vertical RC members i.e. Confining
members.
Vertical members- Tie columns .
Horizontal members- Tie beams.
Similar to RC frame members but far smaller in cross
section.

4.  Enhancing the stability and integrity of walls for in
plane and out plane EQ loads.
 Enhancing the resistance of walls- Lateral loads
 Reducing brittleness of masonry- improve the
performance.

5. Sr.
No.
Confined Masonry RC frame construction
01 Masonry walls- main load bearing
elements and resists both gravity
and lateral loads.
RC frames resist both gravity and
lateral loads.
Masonry infills are non load bearing
walls.
02 Strip footing beneath the wall and
the RC plinth band
Isolated footing beneath each
column
03 Sequence
Construction of masonry walls
Tie columns are cast in place
Tie beams are constructed on top of
the walls along with the slab
Sequence
Frame is constructed first
Masonry walls are constructed at a
later stage, which are not bonded
with columns.

6.  Guidelines for confined masonry construction
The building plan should be of a regular shape.

7.  The building should not be excessively long relative to
it’s width. ( Ideally the length to width ratio should not
exceed 4)

13. Acknowledgement:
 Svetlana Brzev, “ Earthquake-Resistant Confined Masonry
Construction”, National Information Centre of Earthquake
Engineering (NICEE) IIT, Kanpur.