Title: Seismic analysis of existing RC frame structures under near-field ground motions
Abstract: With the method of nonlinear time history analysis,the behaviors of a four-story reinforced concrete frame designed according to TJ11-78 edition seismic code for industrial and civil buildings was studied under the action of near-field ground motions with forward directivity and fling-step and far-field ground motions.The results indicate that the seismic responses are magnified much when the structure is subjected to near-field ground motions with forward directivity and fling-step.When the structure is elastic,the amplification effect on base shear is remarkable,after the structure enters inelastic stage,the amplification effect on displacement becomes larger than that of base shear.The methods of nonlinear time history analysis and pushover analysis were applied to estimate the seismic performance of the structure.It is found that the global deformation of the structure exceeds the limited value from edition of 2001 of seismic code for buildings and collapses under rare strong earthquake.This work explains the phenomena quantitatively that most structures designed in 1980's collapsed during Wenchuan earthquake.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot