In present work, Forty storey buildings (120m) have been modeled using software STAAD Pro V8i by P-delta analysis. All the analyses has been carried out as per the Indian Standard code books. Based on the literature of previous studies most effective positioning of shear walls has been chosen. In this paper P-delta analysis of building structures is performed, The methods reviewed include the amplification factor method, the direct method, the iterative method, the negative property member method and second order computer program method. The influence of asymmetry of building on the P-delta effect in elastic ranges of behaviour is evaluated. The result indicated that the effect of P-delta is quite sensitive to characteristics of ground motion such as the frequency content of earthquake. Under P-Delta effect, displacement varies exponentially with increase in height or increment in stories. Axial force also varies with the height of the structure. Because of wide variation in displacement with increase in slenderness, P-Delta analysis is required for structures taller than 7 storeys. the P- Delta effect will be substantial when lateral forces exist on the structure and this increases with increase in number of storey. The P-Delta effect is not predominant on buildings up to seven storeys and it is very negligible when only gravity loading exists on the structure.
Article Details
Unique Paper ID: 155959
Publication Volume & Issue: Volume 9, Issue 2
Page(s): 439 - 441
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