A. Filiatrault et al., ANALYTICAL PREDICTION OF EXPERIMENTAL BUILDING POUNDING, Earthquake engineering & structural dynamics, 24(8), 1995, pp. 1131-1154
Valuable insights on the problem of seismic pounding have been obtaine
d recently from analytical studies. So far, the proposed analytical mo
dels have not been validated experimentally. This paper presents the r
esults of shake table tests of pounding between adjacent three- and ei
ght-storey single-bay steel framed model structures. The pounding resp
onse of the frames was measured for various earthquake intensities and
initial separations. The experimental results were compared to the pr
edictions resulting from two existing pounding analysis programs. The
solution strategy of the first program, SLAM-2, is based on a modal su
perposition technique. The second program, PC-ANSR, is a non-linear ti
me-step analysis code in which an elastic gap element has been include
d. Modelling the pounding effect by elastic gap elements in the two pr
ograms produced accurate displacement and impact force results. Amplit
udes of short acceleration pulses were not well predicted, however, fo
r practical time-step increments. Relative rotations between adjacent
floors induced grinding contacts which cannot be captured by uni-axial
gap elements.