Analytical prediction of experimental building pounding

Abstract

SUMMARYValuable insights on the problem of seismic pounding have been obtained recently from analytical studies. So far, the proposed analytical models have not been validated experimentally. This paper presents the results of shake table tests of pounding between adjacent three-and eight-storey single-bay steel framed model structures. The pounding response of the frames was measured for various earthquake intensities and initial separations. The experimental results were compared to the predictions resulting from two existing pounding analysis programs. The solution strategy of the first program, SLAM-2, is based on a modal superposition technique. The second program, PC-ANSR, is a non-linear timestep analysis code in which an elastic gap element has been included. Modelling the pounding effect by elastic gap elements in the two programs produced accurate displacement and impact force results. Amplitudes of short acceleration pulses were not well predicted, however, for practical time-step increments. Relative rotations between adjacent floors induced grinding contacts which cannot be captured by uni-axial gap elements.

A Hertz contact model with non-linear damping for pounding simulation

“…Among the various experimental studies, only van Mier et al [25] and Papadrakakis and Mouzakis [26] involve concrete as the material. The study by Papadrakakis and Mouzakis [27] attempted to validate the elastic stereomechanical model. Thus, it is possible to select the sti ness parameter of the Hertz model from the range of values (2 kN=mm 3=2 (60 kip in −3=2 ) to 80 kN=mm 3=2 (2300 kip in −3=2 )) described by van Mier et al [25].…”

“…Filiatrault et al [27] conducted shaking table tests on dynamic impact between adjacent three-and eight-storey single-bay steel frames (1=8 scale model), with 0 and 15 mm gap separations, subject to the 1940 El Centro earthquake. The experimental results were compared to analytical predictions based on a linear, elastic spring, with a sti ness of 12.8 kN=mm (73 kips=in).…”

Influence of soil-structure interaction on pounding response of adjacent buildings due to near-source earthquakes

“…After transforming the ground excitation from the time domain into the Laplace domain (7) where s = ƒÂ + iƒÖ is the Laplace parameter and i = •ã-1 , we…”

Prediction of Critical Distance Between Two MDOF Systems Subjected to Seismic Excitation in Terms of Artificial Neural Networks

“…Kasai and Maison [23] proposed the spectral difference method based on random vibration theory that considers the first mode approximation for displacements of elastic multi-storey buildings. Filatrault et al [24] improved the equation of separation distance by using effect of damping ratio. Penzien et al [25] have also recommended calculating an effective period to use original period.…”