Experimental investigation of spatially varying effect of ground motions on bridge pounding

摘要: SUMMARY Pounding between adjacent bridge structures with insufficient separation distance has been identified as one of the primary causes damage in many major earthquakes. It takes place because closing relative movement is larger than structural gap provided structures. This response controlled not only by dynamic properties participating but also characteristics ground excitations. The consequence spatial variation motions studied researchers; however, most these studies were performed numerically. objective present research to experimentally evaluate influence on pounding behaviour three segments. investigation using shake tables. input spatially varying excitations are simulated based New Zealand design spectra for soft soil, shallow soil and strong rock an empirical coherency loss function. Results confirm that nonniform increase displacement girders forces. Copyright © 2012 John Wiley & Sons, Ltd.