Confined Masonry Atop Lego

Chief Engineer (SID&P)PWD, AP

What is Confined Masonry

Confined masonry construction consists of masonry wall and horizontal and vertical RC confining members built on four side of masonry wall.

Vertical members called as tie column or practical column resemble to RC frame construction.

Horizontal element are called as tie beam resemble to beam in RC frame construction.

Typical Confined Masonry Building

Typical Confined Masonry Building

Confined Masonry Building are adopted worldwide

Confined Masonry Building are adopted worldwide

Confined Masonry Building are adopted worldwide

Response of wall to seismic force

Response of wall to seismic force

What will happen in an Earthquake if it is not confined

How Confined Masonry Resist Earth quake

Under earthquake quake shaking, the masonry acts as compressive diagonal struts and the RCC confining element act as tension and compression member.

The RCC element grip the whole width of the wall at the door and window opening and prevent damage of wall.

Performance of Confined Masonry Building in Past Earthquake

Low rise ( one to two) storey confined masonry Building have performing very well in Latin America in recent earthquakes.

Confined masonry performed well in EL Salvador Earthquake of January 13 and February 13,2001 (Magnitude 7.7 and 6.6). 90% of the building constructed with confined masonry did not collapse.

Performance of Confined Masonry Building in Past Earthquake Performance of confined

masonry building in August 2007, Pisco Peru Earthquake.

a). Six story confined masonry building remained undamaged.

b). Collapse of a confined masonry building due to soft story effect

Construction of confined Masonry Buildings

Construction of confined Masonry Buildings

Construction of confined Masonry Buildings

Construction of confined Masonry Buildings

Construction of confined Masonry Buildings

Construction of confined Masonry Buildings

Construction of confined Masonry Buildings

Construction of confined Masonry Buildings

Construction of confined Masonry Buildings

Construction of confined Masonry Buildings

Construction upto sill level

Construction of confined Masonry Buildings

Construction upto lintel level

Construction of confined Masonry Buildings

Construction upto Roof level

Measurement of Materials

Measurement of Materials

Isolated stone masonry Building Proposal

1. “Build a Safe House with CONFINED MASONRY” by Kamu Iyer, C.V.R. Murty, Shibani M. Kulkarni, Rupesh Goswami, Shantanu Subramaniam and A.R. Vijayanarayanan. (Gujarat State Disaster Management Authority, Government of Gujarat)

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