Displacement-based Seismic Design Method Research Of RC Frames

The performance-based seismic design theory is a new concept in the civil engineering field since 1990's.Much attention has been paid to study it and much research has been done.Direct displacement-based seismic design is one of the methods of the performance-based seismic design theory. There are two steps to design a structure according to the seismic code,design the structure according to the bearing capacity at first,then check the deformation of the designed structure However, in the direct displacement-based seismic design, the displacement is the controlling parameter and it can control the action of the structure under the earthquake action.This paper recalled the development process of structure seismic design theory, introduced the concept and design steps of displacement-based seismic design at first.And then had proposed the convenient RC frame direct displacement-based seismic design, applied it in a 12 RC frame building,also had space pushover analysis with tremendous FEA software SAP2000,and finally assessed the seismic resistance performance and level of the structure.From the design example we knew that the structure designed with direct displacement-based seismic design can control the displacement better than the structure designed according to the seismic design code because displacement or deformation can reflect the performance of the structure better than that of strength or capacity.