SEISMIC VULNERABILITY AND STRUCTURAL DESIGN OPTIMIZATION OF MULTI-STOREY BUILDINGS USING STAAD

Abstract

Multi storey building is defined as a building with more than one floor in the building. Multi-storey buildings seek to maximize the floor area of the building but not the area of the land and save money. Conventional methods deal with lot of complications and edacious calculations when analysing multistorey building frames. Such analysis is a time consuming activity. Substitute frame methodology of analysis may prove useful in rough and fast analysis rather than bidding process. Designers have so far used this technique in vertical loading conditions. The given plan which is represented as the office use can be expanded with the minimal facilities. The bending moments in general may cause buildings to fail, the latter refers to shear forces exerted on building members. Remembering these failures, we developed beams, columns, footings under the consideration of maximum loads on members. To simplify the calculation time is saved by using substitute frame method to reduce complexity of loads calculation. It is important in urban regions in particular, we know that R.C structural system is most prevalent nowadays in the urban areas having multi-bay and multi-storeys, which makes its significance in the urban areas more than ever. A building frame comprises of number of bays and storey. A frame with many storeys and many panels is a complex statically intermediate frame. A G+15 storey frame work of R.C building is assumed. The plan (30m 20m) building includes columns constructed monolithically in a network form. The design is prepared by the use of a software on structural analysis design (staad-pro). The construction was exposed to the vertical forces as well as to the horizontal forces. Vertical load is made up of dead load of structural elements like beams, columns, slabs etc and live loads. Horizontal load is made up of the wind forces thereby constructing is made according to IS 875 dead load, live load, and wind load and seismic loads. The structure is the design used in the form of a vertical frame which is two-dimensional and trial and error analysis of the overall building according to the IS 456- 2000 to determine the maximum and the minimum bending moments and the shear forces of the building. The assistance is borrowed by the software in the institute and the calculations of loads, moments and shear force and through this software.