Department of Civil Engineering and Construction, Bradley University, USA. From the BNBC table titled Basic wind speeds for selected locations in Bangladesh, the Basic Wind Speed (, From the Seismic Zone Map of Bangladesh, the Seismic Zone Coefficient (, According to the BNBC, the site soil characteristic is considered as, Table.1 shows the floor panel sizes, column positions, column heights, column sizes, and periphery beam sizes, which are used for the parametric study. If ns is greater than 1.0, then the column is considered to have a slenderness effect. Rathbone (2002) noted that P- effects in structures will always occur and always requires consideration. SAFE perform iterative uplift analysis,any one having experience how to check the results of this analysis?? For a non-sway frame, a designer can neglect slenderness effect if and for a sway frame slenderness effect can be neglected if klu/r < 22, where k is the effective height factor; lu is the unsupported height taken as the clear distance between two floor slabs, beams, or other members providing lateral support; r is the radius of gyration of the cross-section of the column associated with the axis about which bending is occur; M1 is the value of the smaller end moment calculated from a conventional first-order elastic analysis (positive if the column is bent in a single curvature and negative if it is bent in a double curvature); and M2 is the value of the larger factored end moment on the column, and is always positive. calculation of sway and non sway column in Etabs According to Figure 2(a), the value of kl/r is greater or equals to 40 for six corner columns. PDF ETABS v20.0.0 Release Notes - Computers and Structures { Close this window and log in. The unit weight of the concrete is taken as 150 lb/cubic feet (2403 kg/cubic meter). P- is only one of many second-order effects (Dobson & Arnot, 2003). ACI 318 Limit on Second-Order Effects You can have that amount with normal mixing. A slab panel smaller than 15' (4572 mm) does not frequently use in commercial buildings because the column spacing is small for ground floor car parking. The 20' (6096 mm) edge column for the 25'x25' (6096 mm x 6096 mm) panel size showed slenderness effect. Nonlinear Finite Element Analysis of Short and Long Reinforced Concrete Columns Confined with GFRP Tubes.