“ANALYSIS OF SEISMIC POUNDING EFFECTS BETWEEN ADJACENT STRUCTURES

CIVIL ENGINEERING

Major seismic events during the past decade such as those that have occurred in Northridge, Imperial Valley (May 18, 1940), California (1994), Kobe, Japan (1995), Turkey (1999), Taiwan (1999) and Bhuj, Central Western India (2001) have continued to demonstrate the destructive power of earthquakes, with destruction of engineered buildings, bridges, industrial and port facilities as well as giving rise to great economic losses. Among the possible structural damages, seismic induced pounding has been commonly observed in several earthquakes. As a result, a parametric study on buildings pounding response as well as proper seismic hazard mitigation practice for adjacent buildings is carried out. Therefore, the needs to improve seismic performance of the built environment through the development of performance-oriented procedures have been developed. To estimate the seismic demands, linearity of the structure is to be considered during devastating earthquakes. Despite the increase in the accuracy and efficiency of the computational tools related to dynamic analysis, engineers tend to adopt simplified solution oriented procedures instead of doing rigorous analysis when evaluating seismic demands. This is due to the problems related to its complexities and suitability for practical design applications. This project entitled “Study of Seismic Pounding Effects Between Adjacent Buildings” aims at studying seismic gap between adjacent buildings by linear dynamic analysis in ETABS .A parametric study is conducted to investigate the minimum seismic pounding gap between two adjacent structures by response Spectrum analysis for hard soil and Earthquake recorded excitation are used for input in the dynamic analysis on different models. Pounding produces acceleration and shear at various story levels that are greater than those obtained from the no pounding case, while the peak drift depends on the input excitation characteristics. Also, increasing gap width is likely to be effective when the separation is sufficiently wide practically to eliminate contact.

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