Page 183 - Advanced Design Examples of Seismic Retrofit of Structures

Example of an RC Building Retrofitted by RC Shear Walls Chapter 3 175

FIG. 3.36 Shear forces in the shear wall W2 ( 10 1 kN/m).

aim of these controls is determination of the capacity adequacy of the soil and
foundation.

Loads Combinations For controlling the soil pressure and settlement, the load
combination D+L is used. The load combination 1.2D+1.6L is utilized for con-
trolling the foundation capacity. ACI 318 [5] is used in this part.

Controlling the Soil Pressure Under Foundation Based on the geotechnical
consultant recommendation, the modulus of soil reaction in vertical direction
7
3
(K s ) is assumed as 2.2 10 N/m . The results of Fig. 3.37 indicate the soil pres-
sure in the majority of locations is smaller than the allowable soil stress
q a ¼0.35MPa. It is noteworthy that the equipment load is assumed to be 4kPa.
Controlling the Soil Settlement The results of Fig. 3.38 show the soil settle-
ment in the southern and the northern parts are 1.5cm and 1.0cm, respectively,
which are smaller than the allowable settlement of 5.0cm.