Seismic Responses Analysis of Skew Multi-Ribbed Frame Structure Based on ETAbs

In order to study seismic response of the skew multi-rib frame structure under small earthquake and its components yield sequence under larger earthquake,the models are calculated by ETAbs program,and variation rules of basic dynamic characteristics are compared by changing the structures of multi-ribbed units.Elastic analysis shows that the multi-ribbed units can improve lateral stiffness of the frame and change the appearing sequence of unfavorable models,so the whole stress characteristics of the structure are more reasonable.Pushover analysis shows that the transmission way of inclined members is more direct to participate in seismic,and the structure possess ductility destruction mechanism is the first unit,then is the outer frame,and the modern aseismic design principles of the structure are achieved.It is very significant to put forward the skew multi-ribbed open-web frame structure to improve seismic performance of the common frame structure in high earthquake intensity area.