Effect of P- Δ (delta) analysis for slender building structures

High-rise buildings are essential in metro cities of developing countries. One of the important aspect of design of tall buildings/frames is to ensure its lateral stability taking care of maximum drift stipulation. This paper includes guidelines stipulated in various codes [such as UBC – Vol. 3 (1997) , IS: 800 Draft (2006), IS: 1893 (2002 Part-1), etc.] to restrict the P-A effect. According to the recent trends for economic limit state design, it is necessary to carry out the nonlinear dynamic analysis in seismic condition for highly ductile material. This also helps to avail advantage of high strength within elastic range. As steel is more ductile than reinforced concrete, geometric non-linearity including stress softening P-A effect is an important factor in the design of tall slender steel structures. This also ensures suitability of steel intensive construction including steel-concrete composite construction over the conventional RCC framed construction.