Effect of the rotational ground motion on the response of slender towers
The effect of the rotational (rocking) component of seismic ground motion on the response of slender, tower-shaped structures has been investigated. The rotational motion has been obtained by differentiating random field of strong ground motion with respect to spatial coordinate. Substantial contribution (about 30 to 40%) of rotational motion in the bending moment in the shaft of r/c chimney has been observed (see figure below taken from ZEMBATY Z. and BOFFI G., Effect of rotational seismic ground motion on dynamic response of slender towers, European Earthquake Engineering , vol.8, 1994, no. 1, pp.3-11.
For more information about structural response under rotational seismic effects see updated list of the papers published in peer reviewed papers e.g.:
BONKOWSKI P.A., KUS, J. ZEMBATY, Z. , Seismic rocking effects on a mine tower under induced and natural earthquakes, Archives of Civil and Mechanical Engineering, vol.21, 65, 2021
BONKOWSKI P.A., ZEMBATY Z., MINCH Y.M., Seismic effects on leaning slender structures and tall buildings, Engineering Structures, 2019, vol. 198, 109518
BONKOWSKI P., ZEMBATY Z., MINCH Y.M., Engineering analysis of strong ground rocking and its effect on tall structures, Soil Dynamics and Earthquake Engineering, 2019, vol.116, pp. 358-370 , doi:10.1016/j.soildyn.2018.10.026
BONKOWSKI P., ZEMBATY Z., MINCH Y.M., Time history response analysis of a slender tower under translational-rocking seismic excitations, Engineering Structures, 2018, vol.155, pp. 387-393