Evaluation of Seismic Pounding Effects in Buildings

摘要

Structural pounding is a phenomenon which might be seen during earthquakes. It can occur between adjacent buildings which were built without enough separation distance. When adjacent buildings vibrate out of phase and collide with each other under strong excitation because of different dynamic characteristics, the structural pounding can take place. In this study two buildings (G+4) and (G+12) storey, in four different combinations are studied and analyzed. Three types of analyses have been carried out to determine the various structural parameters. A parametric study is conducted to investigate the minimum seismic pounding gap between two adjacent structures by response Spectrum analysis for medium soil and El-Centro Earthquake recorded excitation are used for input in the dynamic analysis on different models. Time History analysis is used to study floor responses of four combination models. Push over analysis is used to study the displacement of (G+4) and (G+12) building at performance point. The result shows that introduction of gap element between two adjacent buildings reduces the maximum response of the buildings. The floor response of building increases with increase in floor number. High rise building gives more defection, the displacement at performance point in high-rise buildings is more compared to low rise buildings. Also, increasing gap width is likely to be effective when the separation is sufficiently wide practically to eliminate contact.