Page 76 - Jabalpur_EQ

Chapter 3 Brick Masonry & Relntorced Concrete Bullding

Parapet

P1

P3 P2

0.25 0.2
0.75 0.80 1.40 1.60 1.60
H 1.40 0.80 10.7514

Dimensions in m

Figure 3A-1. Front elevation of two units of Chandrika Homes, Amanapura.

two housing unit block is shown in Fig. 3A-1. In plan, the block measures 8 m by
7.5 m. A stress analysis of masonry piers performed taking seismic forces spec-
is
ified in IS:1893-1984. The calculations are summarized in Table 3A-1.

TABLE 3A-1. Elastic Stress Analysis of Piers

of
Basic Data and Computation Design Lateral Loads (IS:1893-1984)
Seismic Coefficient 0.04 (Zone Ill) Base Shear 91 kN (K=1.6)
=
Seismic weight Lateral Load:
Roof level = 524 kN Roof level = 64 kN
First Floor = 903 kN First Floor = 17 kN

Elastic Stress Analysis of Masonry Piers

Pier Relative Compressive Bending Max. Total Stress
Stiffness Gravity Stress due Overturning (Worst
(kN/m) Stress to Shear Stress (kPa) combination)
(kPa) (kPa) (kPa)
P1 0.0043 197 t 19 t 149 29
P2 0.0358 197 194 t 112 109
P3 0.1125 197 t 152 30 15

Jabalpur Earthquake of May 22, 1997 66