Research and optimization of the belt truss location in high-rise RCC structure

Abstract

Rapid improvement in infrastructure to acquire the development of modern civilization is the demand of high-rise structures. As day by day, the height of structures is increasing there is problem with its stiffness which induces lateral stability and sway due to lateral forces, which has to be reduce. One more structural system has been developed to overcome problems related to lateral stability and sway of building. To reduce the lateral deflection due to earthquake or wind forces, one of the most efficient and economical structural system used to knock out these challenges is the use of belt truss and outrigger truss. It is commonly used to control the excessive drift due to lateral load, so that during minor or major earthquake, the risk of structural and non-structural damage can reduce to sufficient amount. The objective of this thesis is to optimize the location of belt truss to control the deflection or sway of building. Here, Belt truss can be shear wall, hollow steel sections, braced sections and many more. In this paper, we are going to compare the results due to different locations of shear wall and X-braced section. Structure is located in earthquake zone IV(India) on Hard rock strata. Different results to be compared are Lateral Deflection, story drift. Study provides comparison between the two, by analyzing and designing the G+24 irregular residential structure. By using belt truss at ideal location, overall lateral deflection reduces by 22%. And this ideal location is obtained when the belt truss is applied at 13th & 14th floors simultaneously. From this location of belt truss, we can conclude that the lateral deflection of the high-rise structure can be reduce by applying the belt truss in the middle floors.