PSI - Issue 46

Ashikur Rahman Simon et al. / Procedia Structural Integrity 46 (2023) 162–168 Simon A. R. et al./ Structural Integrity Procedia 00 (2019) 000–000

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3. Results and discussion 3.1. Storey shear

Storey shear of all models is summarized in Table 2. As expected, storey shear is gradually decreased in the upper floors of the models. It is observed from the following table that storey shear has been decreased by about 85% from ground floor to the roof. This is because the earthquake waves are generated from the ground and the storey which is very near to the ground will be affected by a greater force. The effect of the earthquake thus gradually goes on decreasing to the top stories. Comparing the results of the different models, it is observed that storey shear is slightly reduced when shear walls are placed at periphery. Other than that, no significant variation in storey shear at a particular level of the building is found. Table 2. Storey shear (kip) Storey Storey shear, kip Model 1 Model 2 Model 3 Model 4 Model 5 Model 6 Roof 59.90 64.18 67.14 64.14 64.08 63.57 Storey9 127.40 132.70 135.00 129.22 129.11 130.70 Storey8 188.02 194.23 195.94 187.65 187.51 190.99 Storey7 241.75 248.76 249.95 239.44 239.27 244.42 Storey6 288.59 296.30 297.03 284.60 284.39 291.00 Storey5 328.54 336.85 337.19 323.11 322.88 330.73 Storey4 361.60 370.41 370.43 354.98 354.73 363.62 Storey3 387.77 396.98 396.74 380.22 379.95 389.65 Storey2 407.06 416.56 416.13 398.81 398.53 408.83 Storey1 419.46 429.14 428.60 410.76 410.48 421.16 GF 422.71 432.42 431.76 413.67 413.38 424.31 3.2. Storey drift Storey drift in X and Y directions of all models are summarized in Figure 2 and Table 3. Structural model with no shear wall shows maximum storey drift among all models in both X and Y directions as shown in Figure 2. It indicates that by implementing shear walls it is possible to reduce storey drift significantly. Similar conclusion was also drawn in a different study conducted on the location of shear wall in RC structure (Ganesh.A et al., 2016). After implementing the shear wall, drift values become within the permissible value of 0.004 as per BNBC 2020. It is observed from Table 3 that storey drift is dependent upon the location of the shear wall. In this study, shear walls at the periphery model shows about 95% less drift at the ground floor than no shear wall model in X-direction. On the contrary, the model with shear walls at sides and inner walls shows about 97% less drift at the ground floor than no shear wall model in Y-direction.

Fig. 2. (a) Storey drift in X-direction; (b) Storey drift in Y-direction.