T

Figure 2.14 Shear wall structure

2.8.2 Loading at foundation level

Dead load from first to third floors and roof

= 0.5 (3 x 23.5 + 28.5) = 49.5 kN/m Self-weight = 0.175 x 24 x 15.5 = 65.1 kN/m Characteristic dead load = 49.5 + 65.1 = 114.6 kN/m Characteristic imposed load from slabs

= 2.5 (1.5 + 3 x 4) x 0.7 = 23.6 kN/m Wind loading is taken as 90% of value obtained from CP3: Ch V: Part 2(11). NAD 4(c) Total wind load on building in N-S direction = 0.9 x 449 = 404 kN Wind load on wall = 404/2 = 202 kN Moment in plane of wall = 202 x 8 = 1616 kNm

Hence

Maximum force per unit length due to wind moment

1616 x 6 14.22

2.8.3 Vertical design load intensities at ultimate limit state

Dead load + imposed load

Dead load + wind load

1.35 x 114.6 + 1.5 x 47.4 = 225.8 kN/m; or 1.0 x 114.6 - 1.5 x 47.4 = 43.5 kN/m

Dead load + wind load + imposed load

= 1.35 x 114.6 + 1.35 x 23.6 + 1.35 x 47.4 Eqn 2.8(b)

Therefore maximum design load = 250.6 kN/m

From analysis of slab (not presented), maximum moment perpendicular to plane of wall = 11.65 kNm/m

2.8.4 Slenderness ratio

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