Comparative Study of Direct Displacement Based and Forced Based Design Method

Abstract

The structure of seismic design has traditionally been force based. The major factor for damage is displacement rather than force. The most popular alternative procedure for seismic design, is performance based design method. The global parameter of performance based design method is displacement. For seismic design of structure direct displacement based design method has been used. Using Displacement based design method and Forced based design method the paper attempts to design moment resisting RC-frame G+7-storey building. The parameters like base shear and lateral load distribution are taken for the study. It has been observed that base shear of RC building calculated by DDBD is compared to FBD. It is noticed that fully Operational, Immediate Occupancy, Life Safety, and Near Collapse are the four performance levels. In this paper, a G+7 structure is lay to ground vibrations from earthquakes in India. The standard used to categorize the performance levels is displacement. Operational, Immediate Occupancy, Life Safety, and Collapse Prevention performance levels are 0.37 %, 0.70 %, %, and 5.0 %respectively of the overall height of the building. To perform non-linear dynamic analysis time History Analysis is used. The STAAD Pro software is used for analysis. The change in displacements which in turn brought changes in Performance levels was observed.