Evaluation Of Seismic Performance Of Frame Columns

RC frames with special-shaped columns,i.e.columns with L,T or X-shaped cross sections,have been developed rapidly in recent decades and considered to be a structure suitable for residential buildings.This project,advised by Prof.Wang Tiecheng,has made some achievements as follows,aiming at providing experimental basis for the application of the frames in those areas of high seismic intensity.1.Pseudo-static test conducted on a 6-story RC frame with special-shaped columns.Anti-seismic property including the Ductility, plastic hinges of beams and columns has been obtained.The results show us a properly-designed frame with L and T shaped columns in it,which can resist the seismic action generated by the earthquake with 8-degree intensity,a high intensity in the classification in China's code of design.2. Through massive calculation,analysis and comparison,sum up the similarities and differences between the special-shaped cross sections and rectangular cross sections in mechanical features,between reinforced concrete special-shaped columns and rectangular columns in load-bearingcapacity,ductility performance and provide necessary basic concepts and data for furtherunderstanding the characteristics of the special-shaped columns.3.A newly-developed theory of anti-seismic design,based on the seismic behavior of structures,prompted the booming of push-over analysis,or otherwise known as static non-linear analysis.With modified strain-stress model of the concrete.Push-over analysis can be used to find out weak points of frame structures so that you don't have to waste your time to modify the whole package of your design.Furthermore,the capacity spectrum method was applied to evaluate the anti-seismic performance of the frames.The performance, points indicate that the performance is compatible with the objectives of the design.